BUFR and CREX Code & Flag Tables

As used by SoftBUFR and T-CREX Class Libraries

version 9.02 (created 2000-12-17), based on WMO Code&Flag Table version 9

© Northern Lighthouse Ltd           Northern Lighthouse home

Please consult the original WMO file or printed manual for more details and for possible notes!

01 02 08 10 11 13 19 20 21 22 23 24 25 26 29 30 31 33 35


Class 01


0'01'003 - WMO Region number/geographical area

 C 001003
     0 Antarctica
     1 Region I
     2 Region II
     3 Region III
     4 Region IV
     5 Region V
     6 Region VI
     7 Missing value

0'01'007 - Satellite identifier

  • 001-099: Allocated to European Union
  • 100-199: Allocated to Japan
  • 200-299: Allocated to USA
  • 300-399: Allocated to Russian Federation
  • 400-499: Allocated to India
  • 500-599: Allocated to China
  • 600-699: Allocated to European Union
  • 700-799: Allocated to USA
     C 001007
         0 Reserved
         1 ERS1
         2 ERS2
         3 METOP-1
         4 METOP-2
         5 METOP-3
        20 SPOT1
        21 SPOT2
        22 SPOT3
        23 SPOT4
        50 METEOSAT 3
        51 METEOSAT 4
        52 METEOSAT 5
        53 METEOSAT 6
        54 METEOSAT 7
        59 METEOSAT 2
        71 MSG-1
        72 MSG-2
        73 MSG-3
       120 ADEOS
       150 GMS 3
       151 GMS 4
       152 GMS 5
       171 MTSAT-1
       200 NOAA 8
       201 NOAA 9
       202 NOAA 10
       203 NOAA 11
       204 NOAA 12
       205 NOAA 14
       206 NOAA 15
       207 NOAA 16
       208 NOAA 17
       209 NOAA 18
       220 LANDSAT 5
       221 LANDSAT 4
       222 LANDSAT 7
       240 DMSP 7
       241 DMSP 8
       242 DMSP 9
       243 DMSP 10
       244 DMSP 11
       245 DMSP 12
       246 DMSP 13
       250 GOES 6
       251 GOES 7
       252 GOES 8
       253 GOES 9
       254 GOES 10
       255 GOES 11
       256 GOES 12
       281 QUIKSCAT
       310 GOMS 1
       311 GOMS 2
       320 METEOR 2-21
       321 METEOR 3-5
       322 METEOR 3M-1
       323 METEOR 3M-2
       341 RESURS 01-4
       430 INSAT 1B
       431 INSAT 1C
       432 INSAT 1D
       450 INSAT 2A
       451 INSAT 2B
       452 INSAT 2E
       470 INSAT 3A
       471 INSAT 3D
       472 INSAT 3E
       500 FY-1C
       501 FY-1D
       510 FY-2
       700 TIROS M (ITOS 1)
       701 NOAA 1
       702 NOAA 2
       703 NOAA 3
       704 NOAA 4
       705 NOAA 5
       706 NOAA 6
       707 NOAA 7
       708 TIROS-N
       710 GOES (SMS 1)
       711 GOES (SMS 2)
       731 GOES 1
       732 GOES 2
       733 GOES 3
       734 GOES 4
       735 GOES 5
      1023 Missing value
     
    800-1022 Reserved

    0'01'031 - Identification of originating/generating centre

    (See 0'01'033, which should be used instead for encoding)


    0'01'033 - Identification of originating/generating centre

  • 01-09: WMCs
  • 10-25: Centres in Region I
  • 26-40: Centres in Region II
  • 41-50: Centres in Region III
  • 51-63: Centres in Region IV
  • 64-73: Centres in Region V
  • 74-99: Centres in Region VI
     C 001033
         0 WMO Secretariat
         1 Melbourne
         2 Melbourne
         4 Moscow
         5 Moscow
         7 US National Weather Service, National Centres for Environmental Prediction (NCEP)
         8 US National Weather Service Telecommunications Gateway (NWSTG)
         9 US National Weather Service - Other
        10 Cairo (RSMC/RAFC)
        12 Dakar (RSMC/RAFC)
        14 Nairobi (RSMC/RAFC)
        16 Reserved
        17 Reserved
        18 Tunis-Casablanca (RSMC)
        20 Las Palmas (RAFC)
        21 Algiers (RSMC)
        22 Reserved
        23 Reserved
        24 Pretoria (RSMC)
        25 La Reunion (RSMC)
        26 Khabarovsk (RSMC)
        28 New Delhi (RSMC/RAFC)
        30 Novosibirsk (RSMC)
        32 Tashkent (RSMC)
        33 Jeddah (RSMC)
        34 Tokyo (RSMC), Japan Meteorological Agency
        36 Bangkok
        37 Ulan Bator
        38 Beijing (RSMC)
        40 Seoul
        41 Buenos Aires (RSMC/RAFC)
        43 Brasilia (RSMC/RAFC)
        45 Santiago
        46 Brazilian Space Agency - INPE
        51 Miami (RSMC/RAFC)
        52 Miami (RSMC), National Hurricane Centre
        53 Montreal (RSMC)
        55 San Francisco
        56 Reserved
        57 US Air Force - Air Force Global Weather Central
        58 Fleet Numerical Meteorology and Oceanography Centre, Monterey, CA, USA
        59 The NOAA Forecast Systems Laboratory, Boulder, CO, USA
        60 United States National Centre for Atmospheric Research (NCAR)
        64 Honolulu
        65 Darwin (RSMC)
        67 Melbourne (RSMC)
        69 Wellington (RSMC/RAFC)
        71 Nadi (RSMC)
        74 UK Meteorological Office, Bracknell (RSMC)
        76 Moscow (RSMC/RAFC)
        78 Offenbach (RSMC)
        80 Rome (RSMC)
        82 Norrköping
        84 Reserved
        85 Toulouse (RSMC)
        86 Helsinki
        87 Belgrade
        88 Oslo
        89 Prague
        90 Episkopi
        91 Ankara
        92 Frankfurt/Main (RAFC)
        93 London (WAFC)
        94 Copenhagen
        95 Rota
        96 Athens
        97 European Space Agency (ESA)
        98 European Centre for Medium Range Weather Forecasts (ECMWF) (RSMC)
        99 De Bilt
       110 Hong Kong
       160 US NOAA/NESDIS
       210 Frascati (ESA/ESRIN)
       211 Lanion
       212 Lisboa
       213 Reykjavik
       254 EUMETSAT Operation Centre
       255 Missing value
    
    NOTES: 
    (3) With BUFR, to indicate whether the originating/generating centre is a sub-centre or not, the following procedure should be applied:
    Use in BUFR of Octet 5, Section 1 with the following meaning:
    Code figure 0 Not a sub-centre, the originating/generating centre is the centre defined by Octet 6, Section 1 of BUFR. 1 to 254 Identifier of the sub-centre which is the originating/generating centre. The identifier of the sub-centre is allocated by the associated centre which is defined by octet 6, Section 1 of BUFR. The sub-centre(s) identifiers should be supplied to the WMO Secretariat by the associated centre(s) for publication.

    0'01'034 - Identification of originating/generating sub-centre

    (To be defined by centres themselves)

    
    

    Class 02


    0'02'001 - Type of station

     C 002001
         0 Automatic
         1 Manned
         2 Hybrid: both manned and automatic
         3 Missing value
    

    0'02'002 - Type of instrumentation for wind measurement

    Type of instrumentation and original units for wind measurement (measured in m/s unless otherwise indicated)

     F 002002
         1 Certified instruments
         2 Originaly measured in knots
         3 Originaly measured in km h-1
     
    All 4 Missing value

    0'02'003 - Type of measuring equipment used

     C 002003
         0 Pressure instrument associated with wind measuring equipment
         1 Optical theodolite
         2 Radio theodolite
         3 Radar
         4 VLF-Omega
         5 Loran-C
         6 Wind profiler
         7 Satellite navigation
         8 Radio-Acoustic Sounding System (RASS)
         9 Sodar
        14 Pressure instrument associated with wind measurement equipment but pressure element failed during ascent
        15 Missing value
     
    10-13 Reserved

    0'02'004 - Type of instrument for evaporation measurement or type of crop for which evapotranspiration is reported

    Instrument or crop type - Type of data

     C 002004
         0 USA open pan evaporimeter (without cover) - Evaporation
         1 USA open pan evaporimeter (mesh covered) - Evaporation
         2 GGI-3000 evaporimeter (sunken) - Evaporation
         3 20 m² tank - Evaporation
         4 Others - Evaporation
         5 Rice - Evapotraspiration
         6 Wheat - Evapotraspiration
         7 Maize - Evapotraspiration
         8 Sorghum - Evapotraspiration
         9 Other crops - Evapotraspiration
        15 Missing value
     
    10-14 Reserved

    0'02'011 - Radiosonde type

     C 002011
         0 Reserved
         1 Reserved
         2 No radiosonde - passive target (e.g. reflector)
         3 No radiosonde - active target (e.g. transponder)
         4 No radiosonde - passive temperature-humidity profiler
         5 No radiosonde - active temperature-humidity profiler
         6 No radiosonde - radio-acoustic sounder
         7 No radiosonde - ... (reserved)
         8 No radiosonde - ... (reserved)
         9 No radiosonde - system unknown or not specified
        10 VIZ type A pressure-commutated (USA)
        11 VIZ type B time-commutated (USA)
        12 RS SDC (Space Data Corporation - USA)
        13 Astor (no longer made - Australia)
        14 VIZ MARK I MICROSONDE (USA)
        15 EEC Company type 23 (USA)
        16 Elin (Austria)
        17 GRAW G. (Germany)
        18 Reserved for allocation of radiosondes
        19 GRAW M60 (Germany)
        20 Indian Meteorological Service MK3 (India)
        21 VIZ/Jin Yang MARK I MICROSONDE (South Korea)
        22 Meisei RS2-80 (Japan)
        23 Mesural FMO 1950A (France)
        24 Mesural FMO 1945A (France)
        25 Mesural MH73A (France)
        26 Meteolabor Basora (Switzerland)
        27 AVK-MRZ (Russian Federation)
        28 Meteorit Marz2-1 (Russian Federation)
        29 Meteorit Marz2-2 (Russian Federation)
        30 Oki RS2-80 (Japan)
        31 VIZ/Valcom type A pressure-commutated (Canada)
        32 Shanghai Radio (China)
        33 UK Met Office MK3 (UK)
        34 Vinohrady (Czechoslovakia)
        35 Vaisala RS18 (Finland)
        36 Vaisala RS21 (Finland)
        37 Vaisala RS80 (Finland)
        38 VIZ LOCATE Loran-C (USA)
        39 Sprenger E076 (Germany)
        40 Sprenger E084 (Germany)
        41 Sprenger E085 (Germany)
        42 Sprenger E086 (Germany)
        43 AIR IS - 4A - 1680 (USA)
        44 AIR IS - 4A - 1680 X (USA)
        45 RS MSS (USA)
        46 Air IS - 4A - 403 (USA)
        47 Meisei RS2-91 (Japan)
        48 VALCOM (Canada)
        49 VIZ MARK II (USA)
        50 GRAW DFM-90 (Germany)
        51 VIZ-B2 (USA)
        52 Vaisala RS80-57H
        53 AVK-RF95 (Russian Federation)
        60 Vaisala RS80/MicroCora (Finland)
        61 Vaisala RS80/DigiCora or Marwin (Finland)
        62 Vaisala RS80/PCCora (Finland)
        63 Vaisala RS80/Star (Finland)
        64 Orbital Sciences Corporation, Space Data Division, transponder radiosonde, type 909-11-XX, where XX correspond to the model of the instrument (USA)
        65 VIZ transponder radiosonde, model number 1499-520 (USA)
        71 RS90/DigiCora or Marwin (Finland)
        72 RS90/PC-Cora (Finland)
        73 RS90/Autosonde (Finland)
        74 RS90/Star (Finland)
        75 AVK-MRZ-ARMA (Russian Federation)
        76 AVK-RF95-ARMA (Russian Federation)
        77 GEOLINK GPSonde GL98 (France)
        90 Radiosonde not specified or unknown
        91 Pressure-only radiosonde
        92 Pressure-only radiosonde plus transponder
        93 Pressure-only radiosonde plus radar-reflector
        94 No-pressure radiosonde plus transponder
        95 No-pressure radiosonde plus radar-reflector
        96 Descending radiosonde
       255 Missing value
     
    54- 59 Reserved for allocation of radiosondes 66- 70, 78-89 Reserved for additional automated sounding systems 97- 99 Reserved for allocation of sounding systems with incomplete sondes 100-254 Reserved for allocation of sounding systems with incomplete sondes

    NOTES:

    1. References to countries in brackets indicate the manufacturing location rather than the country using the instrument.
    2. Some of the radiosondes listed are no longer in use but are retained for archiving purposes.

    0'02'012 - Radiosonde computational method

    (To be developed)


    0'02'013 - Solar and infrared radiation correction

     C 002013
         0 No correction
         1 CIMO solar corrected and CIMO infrared corrected
         2 CIMO solar corrected and infrared corrected
         3 CIMO solar corrected only
         4 Solar and infrared corrected automatically by radiosonde system
         5 Solar corrected automatically by radiosonde system
         6 Solar and infrared corrected as specified by country
         7 Solar corrected as specified by country
        15 Missing value
     
    8-14 Reserved

    0'02'014 - Tracking technique/status of system used

  • 1-19: TRACKING TECHNIQUE/STATUS OF ASAP SYSTEM
  • 20-29: STATUS OF SHIP SYSTEM
  • 30-39: SOUNDING SYSTEM
  • 40-49: LAUNCH FACILITIES
  • 50-59: DATA ACQUISITION SYSTEM
  • 60-69: COMMUNICATIONS
     C 002014
         0 No windfinding
         1 Automatic with auxiliary optical direction finding
         2 Automatic with auxiliary radio direction finding
         3 Automatic with auxiliary ranging
         4 Not used
         5 Automatic with multiple VLF-Omega signals
         6 Automatic cross chain Loran-C
         7 Automatic with auxiliary wind profiler
         8 Automatic satellite navigation
        19 Tracking technique not specified
        20 Vessel stopped
        21 Vessel diverted from original destination
        22 Vessel's arrival delayed
        23 Container damaged
        24 Power failure to container
        29 Other problems
        30 Major power problems
        31 UPS inoperative
        32 Receiver hardware problems
        33 Receiver software problems
        34 Processor hardware problems
        35 Processor software problems
        36 NAVAID system damaged
        37 Shortage of lifting gas
        38 Reserved
        39 Other problems
        40 Mechanical defect
        41 Material defect (hand launcher)
        42 Power failure
        43 Control failure
        44 Pneumatic/hydraulic failure
        45 Other problems
        46 Compressor problems
        47 Balloon problems
        48 Balloon release problems
        49 Launcher damaged
        50 R/S receiver antenna defect
        51 NAVAID antenna defect
        52 R/S receiver cabling (antenna) defect
        53 NAVAID antenna cabling defect
        59 Other problems
        60 ASAP communications defect
        61 Communications facility rejected data
        62 No power at transmitting antenna
        63 Antenna cable broken
        64 Antenna cable defect
        65 Message transmitted power below normal
        69 Other problems
        70 All systems in normal operation
        99 Status of system and its components not specified
       127 Missing value
     
    25-28 Reserved for future use 9-18, 54-58, 66-68, 71-98, 100-126 Reserved

    0'02'015 - Radiosonde completeness

     C 002015
         0 Reserved
         1 Pressure only radiosonde
         2 Pressure only radiosonde plus transponder
         3 Pressure only radiosonde plus radar reflector
         4 No-pressure radiosonde plus transponder
         5 No-pressure radiosonde plus radar reflector
        15 Missing value
     
    6-14 Reserved

    0'02'019 - Satellite instruments

    Agency - Type - Instrument short name

     C 002019
         1 ASI       Lidar               Laser cornercube reflectors
        10 BNSC      Radiometer          AATSR
        11 BNSC      Radiometer          ATSR
        12 BNSC      Radiometer          ATSR-2
        13 BNSC      Radiometer          MWR
        30 CNES      Communications      ARGOS
        40 CNES      Lidar               Laser reflectors
        41 CNES      Lidar               DORIS
        42 CNES      Lidar               DORIS-NG
        45 CNES      Radar               POSEIDON
        46 CNES      Radar               POSEIDON-2
        47 CNES      Radar               SSALT
        48 CNES      Radar               SSALT-2
        50 CNES      Radiometer          ATSR/M
        51 CNES      Radiometer          HRG
        52 CNES      Radiometer          HRV
        53 CNES      Radiometer          HRVIR
        54 CNES      Radiometer          ScaRaB/MV2
        55 CNES      Radiometer          POLDER
        60 CNES      Spectrometer        VEGETATION
        61 CNES      Spectrometer        WINDII
        73 CNES      TBD                 UGT
        80 CSA       Communications      RADARSAT DTT
        81 CSA       Communications      RADARSAT TTC
        85 CSA       Radar               SAR (CSA)
        90 CSA       Radiometer          MOPITT
       100 DARA      Radiometer          AMAS
       101 DARA      Radiometer          MOMS-2P
       102 DARA      Radiometer          CHAMP GPS Sounder
       116 DARA      Magnetometer        CHAMP gravity package (Accelerometer+GPS)
       117 DARA      Magnetometer        CHAMP magnetometry package (1 Scalar+2 Vector Magnetometer)
       118 DARA      Lidar               PRARE
       120 ESA       Communications      ENVISAT Comms
       121 ESA       Communications      ERS Comms
       130 ESA       Lidar               ALADIN
       131 ESA       Lidar               ATLID
       140 ESA       Radar               AMI/SAR/Image
       141 ESA       Radar               AMI/SAR/wave
       142 ESA       Radar               AMI/scatterometer
       143 ESA       Radar               ASAR
       144 ESA       Radar               ASAR (image mode)
       145 ESA       Radar               ASAR (wave mode)
       146 ESA       Radar               CPR
       147 ESA       Radar               RA-2/MWR
       148 ESA       Radar               RA/MWR
       149 ESA       Radar               RADAR
       150 ESA       Radar               SCATTEROMETER
       160 ESA       Radiometer          MIMR
       161 ESA       Radiometer          MIPAS
       162 ESA       Radiometer          MWR-2
       163 ESA       Radiometer          SOPRANO
       164 ESA       Radiometer          PRISM
       170 ESA       Spectrometer        GOME
       171 ESA       Spectrometer        GOMI
       172 ESA       Spectrometer        GOMOS
       173 ESA       Spectrometer        MASTER
       174 ESA       Spectrometer        MERIS
       175 ESA       Spectrometer        SCIAMACHY
       180 EUMETSAT  Communications      MCP
       181 EUMETSAT  Communications      METEOSAT Comms
       182 EUMETSAT  Communications      MSG Comms
       190 EUMETSAT  Radar               ASCAT
       200 EUMETSAT  Radiometer          GERB
       201 EUMETSAT  Radiometer          GPS-S
       202 EUMETSAT  Radiometer          GRAS
       203 EUMETSAT  Radiometer          MHS
       204 EUMETSAT  Radiometer          MTS
       205 EUMETSAT  Radiometer          MVIRI
       206 EUMETSAT  Radiometer          OMI
       207 EUMETSAT  Radiometer          SEVIRI
       208 EUMETSAT  Radiometer          VIRI
       220 EUMETSAT  Spectrometer        GOME-2
       221 EUMETSAT  Spectrometer        IASI
       240 INPE      Communications      DCP
       245 INPE      Radiometer          CCD
       246 INPE      Radiometer          HSB
       247 INPE      Radiometer          IR multi-scanner
       248 INPE      Radiometer          OBA
       249 INPE      Radiometer          VWFI
       250 INPE      Radiometer          WFI
       255 INPE      Spectrometer        IRMSS
       260 ISRO      Communications      BSS & FSS transponders
       261 ISRO      Communications      DRT-S&R
       262 ISRO      Communications      INSAT Comms
       268 ISRO      Radiometer          HR-PAN
       269 ISRO      Radiometer          MSMR
       270 ISRO      Radiometer          VHRR
       271 ISRO      Radiometer          WiFS
       272 ISRO      Radiometer          WiFS'
       275 ISRO      Spectro-radiometer  AWiFS
       276 ISRO      Spectro-radiometer  LISS-I
       277 ISRO      Spectro-radiometer  LISS-II
       278 ISRO      Spectro-radiometer  LISS-III
       279 ISRO      Spectro-radiometer  LISS-IV
       284 ISRO      Spectro-radiometer  PAN
       285 ISRO      Spectrometer        MOS
       286 ISRO      Spectrometer        OCM
       290 JMA       Communications      MTSAT Comms
       295 JMA       Radiometer          IMAGER/MTSAT
       296 JMA       Radiometer          VISSR (GMS4)
       300 NASA      Lidar               GLAS
       301 NASA      Lidar               LRA
       302 NASA      Lidar               MBLA
       310 NASA      Radar               DFA
       311 NASA      Radar               LightSAR
       312 NASA      Radar               NSCAT
       313 NASA      Radar               SeaWinds
       330 NASA      Radiometer          ACRIM
       331 NASA      Radiometer          ACRIM II
       335 NASA      Radiometer          AHiRDLS
       336 NASA      Radiometer          ALI
       337 NASA      Radiometer          AMLS
       340 NASA      Radiometer          AMR
       341 NASA      Radiometer          AMR + SSALT
       345 NASA      Radiometer          AMSR/E
       346 NASA      Radiometer          AMSU
       347 NASA      Radiometer          ASTER
       348 NASA      Radiometer          CERES
       349 NASA      Radiometer          EOSP
       350 NASA      Radiometer          ETM
       351 NASA      Radiometer          GPSDR
       352 NASA      Radiometer          GRACE
       353 NASA      Radiometer          HiRDLS
       354 NASA      Radiometer          HRDI
       355 NASA      Radiometer          LATI
       356 NASA      Radiometer          LIS
       357 NASA      Radiometer          NMP Vis/IR Land Imager
       358 NASA      Radiometer          PEM
       376 NASA      Radiometer          POLDER II
       359 NASA      Radiometer          SeaWiFS
       360 NASA      Radiometer          SUSIM (UARS)
       361 NASA      Radiometer          T/P GDR
       362 NASA      Radiometer          T/P IGDR
       365 NASA      Radiometer          TMI
       366 NASA      Radiometer          JMR
       367 NASA      Radiometer          TPFO GDR
       368 NASA      Radiometer          TPFO IGDR
       375 NASA      Radiometer          VIRS
       380 NASA      Spectro-radiometer  AMISR
       381 NASA      Spectro-radiometer  AMODIS
       382 NASA      Spectro-radiometer  CLAES
       383 NASA      Spectro-radiometer  HALOE
       384 NASA      Spectro-radiometer  ISAMS
       385 NASA      Spectro-radiometer  MISR
       386 NASA      Spectro-radiometer  MLS
       387 NASA      Spectro-radiometer  MLS (EOS-CHEM)
       388 NASA      Spectro-radiometer  MLS (UARS)
       389 NASA      Spectro-radiometer  MODIS
       400 NASA      Spectro-radiometer  SAGE II
       401 NASA      Spectro-radiometer  SAGE III
       420 NASA      Spectrometer        AIRS
       421 NASA      Spectrometer        AIRS + AMSU
       424 NASA      Spectrometer        ATES
       426 NASA      Spectrometer        SOLSTICE
       427 NASA      Spectrometer        SOLSTICE II
       430 NASA      Spectrometer        TES
       431 NASA      Spectrometer        TOMS
       450 NASDA     Communications      ADEOS Comms
       451 NASDA     Communications      DCS (NASDA)
       452 NASDA     Communications      DPC
       453 NASDA     Communications      GMS Comms
       454 NASDA     Communications      JERS-1 Comms
       460 NASDA     Lidar               RIS
       461 NASDA     Radar               PR
       462 NASDA     Radar               SAR
       463 NASDA     Radar               VSAR
       470 NASDA     Radar               PALSAR
       480 NASDA     Radiometer          ALOS/PRISM
       481 NASDA     Radiometer          AMSR
       482 NASDA     Radiometer          AVNIR
       483 NASDA     Radiometer          AVNIR-2
       484 NASDA     Radiometer          GLI
       485 NASDA     Radiometer          MESSR
       486 NASDA     Radiometer          MSR
       487 NASDA     Radiometer          OCTS
       488 NASDA     Radiometer          OPS
       489 NASDA     Radiometer          VISSR (GMS5)
       490 NASDA     Radiometer          VTIR
       510 NASDA     Spectrometer        ILAS
       511 NASDA     Spectrometer        ILAS-II
       512 NASDA     Spectrometer        IMG
       513 NASDA     Spectrometer        ODUS
       514 NASDA     Spectrometer        SEM (NASDA)
       540 NOAA      Communications      DCS (NOAA)
       541 NOAA      Communications      GOES Comms
       542 NOAA      Communications      LANDSAT Comms
       543 NOAA      Communications      NOAA Comms
       544 NOAA      Communications      S&R (GOES)
       545 NOAA      Communications      S&R (NOAA)
       546 NOAA      Communications      WEFAX
       560 NOAA      Radiometer          (HIRS/2 + SBUV/2)
       561 NOAA      Radiometer          (HIRS/3 + SBUV/2)
       570 NOAA      Radiometer          AMSU-A
       571 NOAA      Radiometer          AMSU-A1-1
       572 NOAA      Radiometer          AMSU-A1-2
       573 NOAA      Radiometer          AMSU-A2
       574 NOAA      Radiometer          AMSU-B
       580 NOAA      Radiometer          ATOVS (HIRS/3 + AMSU + AVHRR/3)
       590 NOAA      Radiometer          AVHRR/2
       591 NOAA      Radiometer          AVHRR/3
       592 NOAA      Radiometer          AVHRR/4
       600 NOAA      Radiometer          ERBE
       601 NOAA      Radiometer          ETM+
       605 NOAA      Radiometer          HIRS/2
       606 NOAA      Radiometer          HIRS/3
       607 NOAA      Radiometer          HIRS/4
       615 NOAA      Radiometer          IMAGER
       616 NOAA      Radiometer          IMAGER/NP
       620 NOAA      Radiometer          CrSS
       621 NOAA      Radiometer          MICROWAVE/NP
       622 NOAA      Radiometer          MSS
       623 NOAA      Radiometer          MSU
       624 NOAA      Radiometer          SBUV/2
       625 NOAA      Radiometer          SBUV/3
       626 NOAA      Radiometer          SOUNDER
       627 NOAA      Radiometer          SSU
       628 NOAA      Radiometer          TM
       629 NOAA      Radiometer          TOVS (HIRS/2 + MSU + SSU)
       630 NOAA      Radiometer          VAS
       645 NOAA      Spectrometer        SEM
       650 NRSCC     Radiometer          MVIRSR (10 channel)
       651 NRSCC     Radiometer          MVIRSR (3 channel)
       652 NRSCC     Radiometer          MVIRSR (5 channel)
       670 NSAU      Radar               RLSBO
       671 NSAU      Radar               RLSBO with scatterometer
       672 NSAU      Radar               SAR (NSAU)
       680 NSAU      Radiometer          MSU-EU
       681 NSAU      Radiometer          MSU-UM
       682 NSAU      Radiometer          RM-08
       683 NSAU      Radiometer          SU-UMS
       684 NSAU      Radiometer          SU-VR
       685 NSAU      Radiometer          TRASSER
       692 NSAU      Spectro-radiometer  Spectroradiometer medium resolution
       693 NSAU      Spectro-radiometer  TIR spectroradiometer
       700 RSA       Communications      KONDOR-2
       701 RSA       Communications      BRK
       710 RSA       Lidar               ALISSA
       711 RSA       Lidar               Balkan-1
       712 RSA       Lidar               Balkan-2 lidar
       715 RSA       Lidar               MK-4
       716 RSA       Lidar               MK-4M
       730 RSA       Radar               Greben
       731 RSA       Radar               SAR-10
       732 RSA       Radar               SAR-3
       733 RSA       Radar               SAR-70
       740 RSA       Radar               SLR-3
       745 RSA       Radar               Travers SAR
       750 RSA       Radiometer          174-K
       751 RSA       Radiometer          BTVK
       752 RSA       Radiometer          Chaika
       753 RSA       Radiometer          DELTA-2
       755 RSA       Radiometer          IKAR-D
       756 RSA       Radiometer          IKAR-N
       757 RSA       Radiometer          IKAR-P
       760 RSA       Radiometer          ISP
       761 RSA       Radiometer          KFA-1000
       762 RSA       Radiometer          KFA-200
       763 RSA       Radiometer          KFA-3000
       770 RSA       Radiometer          Klimat
       771 RSA       Radiometer          Klimat-2
       775 RSA       Radiometer          MIRAS
       776 RSA       Radiometer          MIVZA
       777 RSA       Radiometer          MIVZA-M
       780 RSA       Radiometer          MR-2000
       781 RSA       Radiometer          MR-2000M
       785 RSA       Radiometer          MR-900
       786 RSA       Radiometer          MR-900B
       790 RSA       Radiometer          MSU-E
       791 RSA       Radiometer          MSU-E1
       792 RSA       Radiometer          MSU-E2
       793 RSA       Radiometer          MSU-M
       794 RSA       Radiometer          MSU-S
       795 RSA       Radiometer          MSU-SK
       796 RSA       Radiometer          MSU-V
       810 RSA       Radiometer          MTZA
       811 RSA       Radiometer          MVZA
       815 RSA       Radiometer          MZOAS
       820 RSA       Radiometer          R-225
       821 RSA       Radiometer          R-400
       822 RSA       Radiometer          R-600
       830 RSA       Radiometer          RMS
       831 RSA       Radiometer          Scanning IR radiometer
       832 RSA       Radiometer          Scanning microwave radiometer 5-120 GHz
       835 RSA       Radiometer          TV camera
       836 RSA       Radiometer          SILVA
       840 RSA       Spectro-radiometer  SROSMO
       850 RSA       Spectrometer        BUFS-2
       851 RSA       Spectrometer        BUFS-4
       855 RSA       Spectrometer        ISTOK-1
       856 RSA       Spectrometer        SFM-2
       857 RSA       Spectrometer        DOPI
       858 RSA       Spectrometer        KGI-4
       859 RSA       Spectrometer        Ozon-M
       860 RSA       Spectrometer        RMK-2
       870 RSA       TBD                 BNR (280k)
       871 RSA       TBD                 BRIZ
       875 RSA       TBD                 EFO-2
       877 RSA       TBD                 Pheniks
       878 RSA       TBD                 Priroda-5
       900 US DoD    Radiometer          MAXIE
       901 US DoD    Radiometer          OLS
       905 US DoD    Radiometer          SSM/I
       906 US DoD    Radiometer          SSM/T-1
       907 US DoD    Radiometer          SSM/T-2
       908 US DoD    Radiometer          SSMIS
       910 US DoD    Radiometer          SXI
       930 US DoD    Spectrometer        EHIC
       931 US DoD    Spectrometer        X-ray astronomy payload
      2047 Missing value
     
    932- 999 Reserved 1000-2046 Reserved for long-term future use

    0'02'020 - Satellite classification

     C 002020
         0 Nimbus
         1 VTPR
         2 Tiros 1 (Tiros, NOAA-6 to NOAA-13)
         3 Tiros 2 (NOAA-14 onwards)
        31 DMSP
        61 EUMETSAT Polar System (EPS)
        91 ERS
       121 ADEOS
       241 GOES
       271 GMS
       301 INSAT
       331 METEOSAT Operational Programme (MOP)
       332 METEOSAT Transitional Programme (MTP)
       333 METEOSAT Second Generation Programme (MSG)
       351 GOMS
       381 FY-2
       511 Missing value
     
    382-510 Reserved

    0'02'021 - Satellite instrument data used in processing

     F 002021
         1 High resolution infra red sounder (HIRS)
         2 Microwave sounding unit (MSU)
         3 Stratospheric sounding unit (SSU)
         4 AMI wind mode
         5 AMI wave mode
         6 AMI image mode
         7 RADAR altimeter
         8 ATSR
     
    All 9 Missing value

    0'02'022 - Satellite data-processing technique used

    Bit flags denoting the elements included in processing sounding data

     F 002022
         1 Processing technique not defined
         2 Automated statistical regression
         3 Clear path
         4 Partly cloudy path
         5 Cloudy path
         6 Reserved
         7 Reserved
     
    All 8 Missing value

    Notes:

    1. Clear path means the sounding has been generated from clear radiances derived from actual clear spot measurements. Tropospheric and stratospheric HIRS data, as well as MSU and SSU data, have been used.
    2. Partly cloudy path means the sounding has been generated from clear radiances which have been calculated from partly cloudy spots. Tropospheric and stratospheric HIRS data, as well as MSU and SSU data, have been used.
    3. Cloudy path means the sounding has been generated only from stratospheric HIRS data, MSU data and SSU data. Tropospheric HIRS data have not been used because of cloudy conditions.

    0'02'023 - Satellite derived wind computation method

     C 002023
         0 Reserved
         1 Wind derived from cloud motion observed in the infrared channel
         2 Wind derived from cloud motion observed in the visible channel
         3 Wind derived from cloud motion observed in the water vapour channel
         4 Wind derived from motion observed in a combination of spectral channels
         5 Wind derived from motion observed in the water vapour channel in clear air
         6 Wind derived from motion observed in the ozone channel
         7 Wind derived from cloud motion observed in water vapour channel (cloud or clear air not specified)
        15 Missing value
     
    8-14 Reserved

    0'02'024 - Integrated mean humidity computational method

     C 002024
         0 Reserved
         1 Table with full range of humidity variation in layer
         2 Regression technique on 2 humidity values in layer
        15 Missing value
     
    3-14 Reserved

    0'02'025 - Satellite channel(s) used in computation

     C 002025
         1 Reserved
         2 HIRS - Group 1
         3 MSU - Group 1
         4 Reserved
         5 Reserved
         6 HIRS - Group 2
         7 MSU - Group 2
         8 Reserved
         9 Reserved
        10 HIRS (1, 2, 3, 8, 9, 16, 17) - Group 3
        11 HIRS (1, 2, 3, 9, 17) - Group 3
        12 MSU - Group 3
        13 Reserved
        14 Reserved
        15 HIRS - Group 4
        16 HIRS* - Group 4
        17 MSU - Group 4
        18 SKINTK (ocean only) - Group 4
        19 Reserved
        20 Reserved
        21 HIRS* - Group 5
        22 SSU - Group 5
        23 MSU (3, 4) - Group 5
        24 Reserved
     
    All 25 Missing value
    Note: HIRS* is equivalent to: HIRS channels 1 (669 cm-1) 2 (679 cm-1) 3 (690 cm-1) 4 (2358 cm-1)

    0'02'030 - Method of current measurement

     C 002030
         0 Reserved
         1 ADCP (Acoustic Doppler Current Profiler)
         2 GEK (Geomagnetic EloctroKinetograph)
         3 Ship's set and drift determined by fixes 3-6 hours apart
         4 Ship's set and drift determined by fixes more than 6 hours but less than 12 hours apart
         5 Drift of buoy
         6 Reserved
         7 Missing value
    

    0'02'031 - Duration and time of current measurement

     C 002031
         0 Reserved
         1 Instantaneous - between H-1 and H
         2 Averaged over 3 minutes or less - between H-1 and H
         3 Averaged over more than 3 minutes, but 6 at the most - between H-1 and H
         4 Averaged over more than 6 minutes, but 12 at the most - between H-1 and H
         5 Instantaneous - between H-2 and H-1
         6 Averaged over 3 minutes or less - between H-2 and H-1
         7 Averaged over more than 3 minutes, but 6 at the most - between H-2 and H-1
         8 Averaged over more than 6 minutes, but 12 at the most - between H-2 and H-1
         9 Vector or Doppler current profiling method not used
        10 Reserved
        11 1 Hour or less
        12 More than 1 hour but 2 at the most
        13 More than 2 hours but 4 at the most
        14 More than 4 hours but 8 at the most
        15 More than 8 hours but 12 at the most
        16 More than 12 hours but 18 at the most
        17 More than 18 hours but 24 at the most
        18 Reserved
        19 Drift method not used
        31 Missing
     
    20-30 Reserved

    Notes:

    1. Code figures 1-9: Duration and time of current measurement (vector or Doppler current profiling method).
    2. Code figures 11-19: Period of current measurement (drift method).
    3. H = Time of observation.

    0'02'032 - Indicator for digitization

     C 002032
         0 Values at selected depths (data points fixed by the instrument or selected by any other method)
         1 Values at selected depths (data points taken from traces at significant depths)
         2 Reserved
         3 Missing value
    

    0'02'033 - Method of salinity/depth measurement

     C 002033
         0 No salinity measured
         1 In situ sensor, accuracy better than 0.02%o
         2 In situ sensor, accuracy less than 0.02%o
         3 Sample analysis
         7 Missing value
     
    4-6 Reserved

    0'02'034 - Drogue type

     C 002034
         0 Unspecified drogue
         1 Holey sock
         2 TRISTAR
         3 Window shade
         4 Parachute
         5 Non-Lagrangian sea anchor
        31 Missing value
     
    6-30 Reserved (to be developed)

    0'02'036 - Buoy type

     C 002036
         0 Drifting buoy
         1 Fixed buoy
         2 Reserved
         3 Missing value
    

    0'02'037 - Method of tidal observation

     C 002037
         0 Reserved
         1 Manual reading from vertical tide staff
         2 Manual reading from single automatic recorder at station
         3 Manual reading from multiple automatic recorders at station
         4 Automatic reading from single automatic recorder at station without level reference check
         5 Automatic reading from single automatic recorder at station with level reference check, or from multiple automatic recorders
         6 Reserved
         7 Missing
    

    0'02'038 - Method of sea-surface temperature measurement

     C 002038
         0 Ship intake
         1 Bucket
         2 Hull contact sencor
         3 Reversing thermometer
         4 STD/CTD sencor
         5 Mechanical BT
         6 Expendable BT
         7 Digital BT
         8 Thermistor Chain
         9 Infrared scanner
        10 Microwave scanner
        15 Missing value
     
    11-14 Reserved

    0'02'039 - Method of wet-bulb temperature measurement

     C 002039
         0 Measured wet-bulb temperature
         1 Iced bulb measured wet-bulb temperature
         2 Computed wet-bulb temperature
         3 Iced bulb computed wet-bulb temperature
         7 Missing value
     
    4-6 Reserved

    0'02'040 - Method of removing velocity and motion of platform from current

     C 002040
         0 Ship's motion removed by averaging - Ship's velocity removed by bottom tracking
         1 Ship's motion removed by motion compensation - Ship's velocity removed by bottom tracking
         2 Ship's motion not removed - Ship's velocity removed by bottom tracking
         3 Ship's motion removed by averaging - Ship's velocity removed by navigation
         4 Ship's motion removed by motion compensation - Ship's velocity removed by navigation
         5 Ship's motion not removed - Ship's velocity removed by navigation
         6 Doppler current profiling method not used
        15 Missing value
     
    7-14 Reserved

    0'02'041 - Method for estimating reports related to synoptic features

     C 002041
         0 Information based on manual analysis
         1 Information based on computer analysis
         2 Information based on data assimilation
         3 Information based on computer analysis or data assimilation manually modified
        10 Information based on the numerical weather prediction
        63 Missing value
     
    4-9 Reserved 11-62 Reserved for future use

    0'02'044 - Indicator for method of calculation of spectral wave data

     C 002044
         0 Reserved for future use
         1 Longuet-Higgins (1964)
         2 Longuet-Higgins (F3 method)
         3 Maximum likelihood method
         4 Maximum entropy method
        15 Missing value
     
    5-14 Reserved

    0'02'045 - Indicator for type of platform

     C 002045
         0 Sea station
         1 Automatic data buoy
         2 Aircraft
         3 Satellite
        15 Missing value
     
    4-14 Reserved

    0'02'046 - Wave measurement instrumentation

     C 002046
         0 Reserved for future use
         1 Heave sensor
         2 Slope sensor
        15 Missing value
     
    3-14 Reserved

    0'02'048 - Satellite sensor indicator

     C 002048
         0 HIRS
         1 MSU
         2 SSU
         3 AMSU-A
         4 AMSU-B
         5 AVHRR
         6 SSMI
         7 NSCAT
         8 SEAWINDS
        15 Missing value
     
    9-14 Reserved

    0'02'049 - Geostationary satellite data-processing technique used

     F 002049
         1 Processing technique not defined
         2 Simultaneous physical retrieval
         3 Clear sounding
         4 Cloudy sounding
     
    5-7 Reserved for future use All 8 Missing value

    Notes:

    1. Clear sounding indicates the sounding has been generated from a set of clear radiances using all available sounder radiances.
    2. Cloudy sounding indicates that sufficient clear radiances could not be identified in the sounding area. The sounding is calculated from the cloud top (cloud pressure greater than or equal to 780 hPa) upwards.

    0'02'050 - Geostationary sounder satellite channels used

    Bit.No. - Channel - Central wavelength (micrometers)

     F 002050
         1 1  - 14.71
         2 2  - 14.37
         3 3  - 14.06
         4 4  - 13.64
         5 5  - 13.37
         6 6  - 12.66
         7 7  - 12.02
         8 8  - 11.03
         9 9  -  9.71
        10 10 -  7.43
        11 11 -  7.02
        12 12 -  6.51
        13 13 -  4.57
        14 14 -  4.52
        15 15 -  4.45
        16 16 -  4.13
        17 17 -  3.98
        18 18 -  3.74
        19 19 -  0.969
     
    All 20 Missing value

    Note: Beginning with the first bit position (high order bit), if the bit position is set to one, then the channel is used. If the bit position is set to zero, then the channel is not used.


    0'02'051 - Indicator to specify observing method for extreme temperatures

     C 002051
         0 Reserved
         1 Maximum/minimum thermometers
         2 Automated instruments
         3 Thermograph
        15 Missing value
     
    4-14 Reserved

    0'02'052 - Geostationary imager satellite channels used

    Bit.No. - Channel - Central wavelength (micrometers)

     F 002052
         1 1 - 0.55-0.75
         2 2 - 3.9
         3 3 - 6.7
         4 4 - 10.7
         5 5 - 12.0
     
    All 6 Missing value

    Note: Beginning with the first bit position (high order bit), if the bit position is set to one, then the channel is used. If the bit position is set to zero, then the channel is not used.


    0'02'053 - GOES-I/M brightness temperature characteristics

     C 002053
         0 Observed brightness temperature
         1 Brightness temperature with bias correction applied
         2 Brightness temperature calculated from first guess
         3 Brightness temperature calculated from sounding
        15 Missing value
     
    4-14 Reserved

    0'02'054 - GOES-I/M soundings parameter characteristics

     C 002054
         0 Parameter derived using observed sounder brightness temperatures
         1 Parameter derived using observed imager brightness temperatures
         2 Parameter derived using first guess information
         3 Parameter derived using NMC analysis information
         4 Parameter derived using radiosonde information
        15 Missing value
     
    5-14 Reserved

    0'02'055 - Geostationary soundings statistical parameters

     C 002055
         0 Statistics generated comparing retrieval versus radiosonde
         1 Statistics generated comparing retrieval versus first guess
         2 Statistics generated comparing radiosonde versus first guess
         3 Statistics generated comparing observed versus retrieval
         4 Statistics generated comparing observed versus first guess
         5 Statistics generated comparing radiosonde versus imager
         6 Statistics generated comparing radiosonder versus sounder
         7 Statistics generated for radiosonde
         8 Statistics generated for first guess
        15 Missing value
     
    9-14 Reserved

    0'02'056 - Geostationary soundings accuracy statistics

     C 002056
         0 Sum of differences
         1 Sums of squared differences
         2 Sample size
         3 Minimum difference
         4 Maximum difference
        15 Missing value
     
    5-14 Reserved

    0'02'057 - Origin of first guess information for GOES-I/M sounding

     C 002057
         0 Nested Grid Model (NGM)
         1 Aviation Model (AVN)
         2 Medium Range Forecast (MRF) Model
         3 Global Data Assimilation System (GDAS) Forecast Model
         4 Prior soundings (within 3 hours of current time)
         5 Climatology
        15 Missing value
     
    6-14 Reserved

    0'02'058 - Valid times of first guess information for GOES-I/M soundings

     C 002058
         0 12 hour and 18 hour
         1 18 hour and 24 hour
         2  6 hour and 12 hour
         3 Greater than 24 hours
        15 Missing value
     
    4-14 Reserved

    0'02'059 - Origin of analysis information for GOES-I/M soundings

     C 002059
         0 NCEP Nested Grid Model (NGM) Analysis
         1 NCEP Aviation Model (AVN) Analysis
         2 NCEP Medium Range Forecast (MRF) Model Analysis
         3 NCEP Global Data Assimilation System (GDAS) Forecast Model Analysis
        15 Missing value
     
    4-14 Reserved

    0'02'060 - Origin of surface information for GOES-I/M soundings

     C 002060
         0 Current surface hourly reports
         1 Current ship reports
         2 Current buoy reports
         3 One hour old surface hourly reports
         4 One hour old ship reports
         5 One hour old buoy reports
        15 Missing value
     
    6-14 Reserved

    0'02'061 - Aircraft navigation system

     C 002061
         0 Inertial navigator system
         1 OMEGA
         7 Missing value
     
    2-6 Reserved

    0'02'062 - Type of aircraft data relay system

     C 002062
         0 ASDAR
         1 ASDAR (ACARS also available but not operative)
         2 ASDAR (ACARS also available and operative)
         3 ACARS
         4 ACARS (ASDAR also available but not operative)
         5 ACARS (ASDAR also available and operative)
        15 Missing value
     
    6-14 Reserved

    0'02'064 - Aircraft roll angle quality

     C 002064
         0 Good
         1 Bad
         2 Reserved
         3 Missing value
    

    Note: Bad is currently defined as a roll angle >5 degrees from vertical.


    0'02'070 - Original specification of latitude/longitude

     C 002070
         0 Actual location in seconds
         1 Actual location in minutes
         2 Actual location in degrees
         3 Actual location in decidegrees
         4 Actual location om centidegrees
         5 Referenced to checkpoint in seconds
         6 Referenced to checkpoint in minutes
         7 Referenced to checkpoint in degrees
         8 Referenced to checkpoint in decidegrees
         9 Referenced to checkpoint in centidegrees
        10 Actual location in tenths of a minute
        11 Referenced to checkpoint in tenths of a minute
        15 Missing value
     
    12-14 Reserved

    0'02'101 - Type of antenna

     C 002101
         0 Centre front-fed paraboloid
         1 Offset front-fed paraboloid
         2 Centre Cassegrain paraboloid
         3 Offset Cassegrain paraboloid
         4 Planar array
         5 Coaxial-collinear array
         6 Yagi elements array
         7 Microstrip
        14 Other
        15 Missing value
     
    8-13 Reserved

    0'02'103 - Radome

     F 002103
         1 Radar antenna is protected by a radome
     
    All 2 Missing value

    0'02'104 - Antenna polarization

     C 002104
         0 Horizontal polarization
         1 Vertical polarization
         2 Right circular polarization
         3 Left circular polarization
         4 Horizontal and vertical polarization
         5 Right and left circular polarization
        15 Missing value
     
    6-14 Reserved

    0'02'131 - Sensitivity time control (STC)

     F 002131
         1 STC operational
     
    All 2 Missing value

    0'02'143 - Ozone instrument type

     C 002143
         0 Reserved
         1 Brewer spectrophotometer
         2 Caver Teichert
         3 Dobson
         4 Dobson (Japan)
         5 Ehmet
         6 Fecker telescope
         7 Hoelper
         8 Jodmeter
         9 Filter Ozonometer M-83
        10 Mast
        11 Oxford
        12 Paetzold
        13 Regener
        14 Reserved for future use
        15 Vassy filter Ozonometer
        16 Carbon iodide
        17 Surface ozone bubbler
        18 Filter Ozonometer M-124
        19 ECC sonde
       127 Missing value
     
    20-126 Reserved

    0'02'144 - Light source type for Brewer spectrophotometer

     C 002144
         0 Direct Sun
         1 Direct Sun, attenuator #1
         2 Direct Sun, attenuator #2
         3 Focussed Moon
         4 Focussed Sun
         5 Focussed Sun corrected with adjacent sky measurements
         6 Zenith Sky
        15 Missing value
     
    7-14 Reserved

    Note: Entries 1 and 2 should not be used.


    0'02'145 - Wavelength setting for Dobson instruments

     C 002145
         0 Wavelengths AD ordinary setting
         1 Wavelengths BD ordinary setting
         2 Wavelengths CD ordinary setting
         3 Wavelengths CC' ordinary setting
         4 Wavelengths AD focussed image
         5 Wavelengths BD focussed image
         6 Wavelengths CD focussed image
         7 Wavelengths CC' focussed image
        15 Missing value
     
    8-14 Reserved

    0'02'146 - Source condition for Dobson instruments

     C 002146
         0 On direct Sun
         1 On direct Moon
         2 On blue zenith Sky
         3 On zenith cloud (uniform stratified layer of small opacity)
         4 On zenith cloud (uniform or moderately variable layer of medium opacity)
         5 On zenith cloud (uniform or moderately variable layer of large opacity)
         6 On zenith cloud (highly variable opacity, with or without precipitation)
         7 On zenith cloud (fog)
         8 On zenith haze
         9 On direct sun through thin cloud, fog or haze
        15 Missing value
     
    10-14 Reserved

    0'02'148 - Data collection and/or location system

     C 002148
         0 Reserved
         1 Argos
         2 GPS
         3 GOES DCP
         4 METEOSAT DCP
        31 Missing value
     
    5-30 Reserved

    0'02'149 - Type of data buoy

     C 002149
         0 Unspecified drifting buoy
         1 Standard Lagrangian drifter (Global Drifter Programme)
         2 Standard FGGE type drifting buoy (non-Lagrangian meteorological drifting buoy)
         3 Wind measuring FGGE type drifting buoy (non-Lagrangian meteorological drifting buoy)
         4 Ice float
         5 Reserved
         6 Reserved
         7 Reserved
         8 Unspecified sub-surface float
         9 SOFAR
        10 ALACE
        11 MARVOR
        12 RAFOS
        13 Reserved
        14 Reserved
        15 Reserved
        16 Unspecified moored buoy
        17 Nomad
        18 3-metre discus
        19 10-12-metre discus
        20 ODAS 30 series
        21 ATLAS (e.g. TAO area)
        22 TRITON buoy
        23 Reserved
        24 Omnidirectional waverider
        25 Directional waverider
        63 Missing value
     
    26-62 Reserved

    0'02'150 - TOVS/ATOVS/AVHRR instrumentation channel number

     C 002150
         0 Reserved
         1 HIRS 1
         2 HIRS 2
         3 HIRS 3
         4 HIRS 4
         5 HIRS 5
         6 HIRS 6
         7 HIRS 7
         8 HIRS 8
         9 HIRS 9
        10 HIRS 10
        11 HIRS 11
        12 HIRS 12
        13 HIRS 13
        14 HIRS 14
        15 HIRS 15
        16 HIRS 16
        17 HIRS 17
        18 HIRS 18
        19 HIRS 19
        20 HIRS 20
        21 MSU 1
        22 MSU 2
        23 MSU 3
        24 MSU 4
        25 SSU 1
        26 SSU 2
        27 SSU 3
        28 AMSU-A 1
        29 AMSU-A 2
        30 AMSU-A 3
        31 AMSU-A 4
        32 AMSU-A 5
        33 AMSU-A 6
        34 AMSU-A 7
        35 AMSU-A 8
        36 AMSU-A 9
        37 AMSU-A 10
        38 AMSU-A 11
        39 AMSU-A 12
        40 AMSU-A 13
        41 AMSU-A 14
        42 AMSU-A 15
        43 AMSU-B 1
        44 AMSU-B 2
        45 AMSU-B 3
        46 AMSU-B 4
        47 AMSU-B 5
        48 AVHRR 1
        49 AVHRR 2
        50 AVHRR 3a
        51 AVHRR 3b
        52 AVHRR 4
        53 AVHRR 5
        63 Missing value
     
    54-62 Reserved

    0'02'151 - Radiometer identifier

     C 002151
         0 HIRS
         1 MSU
         2 SSU
         3 AMSU-A1-1
         4 AMSU-A1-2
         5 AMSU-A2
         6 AMSU-B
         7 AVHRR
        15 Missing value
     
    8-14 Reserved

    0'02'152 - Satellite instrument used in data processing

     F 002152
         1 High-resolution infrared sounder (HIRS)
         2 Microwave sounding unit (MSU)
         3 Stratospheric sounding unit (SSU)
         4 AMI wind mode
         5 AMI wave mode
         6 AMI image mode
         7 RADAR altimeter
         8 ATSR
         9 Geostationary imager
        10 Geostationary sounder
        11 Geostationary Earth radiation (GERB)
     
    12-30 Reserved All 31 Missing value

    0'02'163 - Height assignment method

     C 002163
         0 Reserved
         1 IRW height assignment
         2 WV height assignment
         3 H2O intercept height assignment
         4 CO2 slicing height assignment
         5 Low pixel max gradient
         6 Higher pixel max gradient
         7 Primary height assignment
         8 Layer thickness assignment
        15 Missing value
     
    9-14 Reserved

    0'02'164 - Tracer correlation method

     C 002164
         0 LP - Norms least square minimum
         1 EN - Euclidean norm with radiance correlation
         2 CC - Cross correlation
         7 Missing value
     
    3-6 Reserved

    0'02'166 - Radiance type

     C 002166
         0 Type not defined
         1 Automated statistical regression
         2 Clear path
         3 Partly cloudy path
         4 Cloudy path
        15 Missing value
     
    5-14 Reserved

    0'02'167 - Radiance computational method

     C 002167
         0 Method not defined
         1 1b raw radiance
         2 Processed radiance
        15 Missing value
     
    3-14 Reserved

    0'02'169 - Anemometer type

     C 002169
         0 Cup rotor
         1 Propeller rotor
         2 Wind Observation Through Ambient Noise (WOTAN)
        15 Missing value
     
    3-14 Reserved

    0'02'172 - Product type for retrieved atmospheric gases

     C 002172
         0 Reserved
         1 Retrieval from a nadir sounding
         2 Retrieval from a limb sounding
       255 Missing value
     
    3-254 Reserved

    Class 08


    0'08'001 - Vertical sounding significance

     F 008001
         1 Surface
         2 Standard level
         3 Tropopause level
         4 Maximum wind level
         5 Significant level, temperature
         6 Significant level, wind
     
    All 7 Missing value

    0'08'002 - Vertical significance (surface observation)

     C 008002
         0 Observing rules for base of lowest cloud and cloud types of FM 12 SYNOP and FM 13 SHIP apply
         1 First significant layer
         2 Second significant layer
         3 Third significant layer
         4 Cumulonimbus layer
         5 Ceiling
         6 Cloud not detected below the following height(s)
         7 Low cloud
         8 Middle cloud
         9 High cloud
        63 Missing value
     
    10-62 Reserved

    0'08'003 - Vertical significance (satellite observations)

     C 008003
         0 Surface
         1 Base of satellite sounding
         2 Cloud top
         3 Tropopause
         4 Precipitable water
         5 Sounding radiances
         6 Mean temperatures
         7 Ozone
        63 Missing value
     
    8-62 Reserved

    0'08'004 - Phase of aircraft flight

     C 008004
         0 Reserved
         1 Reserved
         2 Unsteady (UNS)
         3 Level flight, routine observation (LVR)
         4 Level flight, highest wind encountered (LVW)
         5 Ascending (ASC)
         6 Descending (DES)
         7 Missing value
    

    0'08'005 - Meteorological attribute significance

     C 008005
         0 Reserved
         1 Storm centre
         2 Outer limit or edge of storm
         3 Location of maximum wind
        15 Missing value
     
    4-14 Reserved

    0'08'006 - Ozone vertical sounding significance

     F 008006
         1 Surface
         2 Standard level
         3 Tropopause level
         4 Prominent maximum level
         5 Prominent minimum level
         6 Minimum pressure level
         7 Reserved
         8 Level of undetermined significance
     
    All 9 Missing value

    0'08'007 - Dimensional significance

     C 008007
         0 Point
         1 Line
         2 Area
         3 Volume
        15 Missing value
     
    4-14 Reserved

    Note: A consecutive sequence of 2 or more of location coordinates, such as latitude and longitude pairs, defines a line or polygon. Points shall be joined in the order given in the message. Any area described will fall left of the drawn boundary in the direction established by the order of the points given in the message. This definition is for simple non-intersecting polygons without holes.


    0'08'008 - Radiation vertical sounding significance

     F 008008
         1 Surface
         2 Standard level
         3 Tropopause level
         4 Level of beta radiation maximum
         5 Level of gamma radiation maximum
         6 Minimum pressure level
         7 Reserved
         8 Level of undetermined significance
     
    All 9 Missing value

    0'08'011 - Meteorological feature

     C 008011
         0 Quasi-stationary front at the surface
         1 Quasi-stationary front above the surface
         2 Warm front at the surface
         3 Warm front above the surface
         4 Cold front at the surface
         5 Cold front above the surface
         6 Occlusion
         7 Instability line
         8 Intertropical front
         9 Convergence line
        10 Jet stream
        11 Cloud clear
        12 Cloud
        13 Turbulence
        14 Storm
        15 Airframe icing
        16 Phenomenon
        17 Volcano
        18 Atmospherics
        19 Reserved
        20 Special clouds
        63 Missing value
     
    21-62 Reserved

    0'08'012 - Land/sea qualifier

     C 008012
         0 Land
         1 Sea
         2 Coast
         3 Missing value
    

    0'08'013 - Day/night qualifier

     C 008013
         0 Night
         1 Day
         2 Reserved
         3 Missing value
    

    0'08'014 - Qualifier for runway visual range

     C 008014
         0 10-minute mean value - normal value
         1 10-minute mean value - above the upper limit for assessments of RVR (P)
         2 10-minute mean value - below the lower limit for assessments of RVR (M)
         3 one-minute minumum value - normal value
         4 one-minute minumum value - above the upper limit for assessments of RVR (P)
         5 one-minute minumum value - below the lower limit for assessments of RVR (M)
         6 one-minute maximum value - normal value
         7 one-minute maximum value - above the upper limit for assessments of RVR (P)
         8 one-minute maximum value - below the lower limit for assessments of RVR (M)
        15 Missing value
     
    9-14 Reserved

    0'08'016 - Change qualifier of a trend-type forecast or an aerodrome forecast

     C 008016
         0 NOSIG
         1 BECMG
         2 TEMPO
         3 FM
         7 Missing value
     
    4-6 Reserved

    0'08'017 - Qualifier of the time when the forecast change is expected

     C 008017
         0 FM
         1 TL
         2 AT
         3 Missing value
    

    0'08'018 - SEAWINDS land/ice surface type

     F 008018
         1 Land is present
         2 Surface ice map indicates ice is present
        11 Ice map data not available
        12 Attenuation map data not available
     
    3-10, 13-16 Reserved All 17 Missing value

    0'08'021 - Time significance

     C 008021
         0 Reserved
         1 Time series
         2 Time averaged
         3 Accumulated
         4 Forecast
         5 Forecast time series
         6 Forecast time averaged
         7 Forecast accumulated
         8 Ensemble mean
         9 Ensemble mean time series
        10 Ensemble mean time averaged
        11 Ensemble mean accumulated
        12 Ensemble mean forecast
        13 Ensemble mean forecast time series
        14 Ensemble mean forecast averaged
        15 Ensemble mean forecast accumulated
        16 Analysis
        17 Start of phenomenon
        18 Radiosonde launch time
        19 Start of orbit
        20 End of orbit
        21 Time of ascending node
        22 Time of occurrence of wind shift
        23 Monitoring period
        24 Agreed time limit for report reception
        25 Nominal reporting time
        26 Reserved
        27 First guess
        28 Start of scan
        29 End of scan
        30 Reserved
        31 Missing value
    

    Notes:

    1. "Time averaged" indicates that values are continuously averaged over a period of time.
    2. "Ensemble mean" indicates that a number of distinct values corresponding to a set of time locations are averaged.
    3. Time significance must be qualified by appropriate time periods being specified.

    0'08'023 - First order statistics

     C 008023
         0 Reserved
         1 Reserved
         2 Maximum value
         3 Minimum value
         4 Mean value
         5 Median value
         6 Modal value
         7 Mean absolute error
         8 Reserved
         9 Best estimate of standard deviation (N-1)
        10 Standard deviation (N)
        11 Harmonic mean
        12 Root-mean-square vector error
        32 Vector mean
        63 Missing value
     
    13-31 Reserved 33-62 Reserved for local use

    Note: All first order statistics are in the units defined by the original data descriptors.


    0'08'024 - Difference statistics

     C 008024
         0 Reserved
         1 Reserved
         2 Observed minus maximum
         3 Observed minus minimum
         4 Observed minus mean
         5 Observed minus median
         6 Observed minus mode
        11 Observed minus climatology (anomaly)
        12 Observed minus analysed value
        13 Observed minus initialized analysed value
        14 Observed minus forecast value
        21 Observed minus interpolated value
        22 Observed minus hydrostatically calculated value
        63 Missing value
     
    7-10, 15-20, 23-31 Reserved 32-62 Reserved for local use

    Notes:

    1. Difference statistics are difference values; they have dimensions the same as the corresponding reported values with respect to units, but assume a range centred on zero (e.g., the difference between reported and analysed values, the difference between reported and forecast values, etc.).
    2. Where observed minus forecast values are represented, the period of the forecast shall be indicated by an appropriate descriptor from class 4.

    0'08'025 - Time difference qualifier

     C 008025
         0 Universal Time Coordinated (UTC) minus Local Standard Time (LST)
         1 Local Standard Time
         2 Universal Time Coordinated (UTC) minus Satellite clock
         5 Time difference from edge of processing segment
        15 Missing
     
    3-4, 6-14 Reserved

    0'08'035 - Type of monitoring exercise

     C 008035
         0 Global
         1 Regional
         2 National
         3 Special
         4 Bilateral
         5 Reserved
         6 Reserved
         7 Missing value
    

    0'08'036 - Type of centre or station performing monitoring

     C 008036
         0 WMO Secretariat
         1 WMO
         2 RSMC
         3 NMC
         4 RTH
         5 Observing site
         6 Other
         7 Missing value
    

    0'08'051 - Qualifier for number of missing values in calculation of statistics

     C 008051
         1 Pressure
         2 Temperature
         3 Extreme temperature
         4 Vapour pressure
         5 Precipitation
         6 Sunshine duration
         7 Missing value
    

    0'08'052 - Condition for which number of days of occurrence follows

     C 008052
         0 Mean wind speed over a 10-minute period observed or recorded equal to or more than 10 m/s or 20 knots
         1 Mean wind speed over a 10-minute period observed or recorded equal to or more than 20 m/s or 40 knots
         2 Mean wind speed over a 10-minute period observed or recorded equal to or more than 30 m/s or 60 knots
         3 Maximum temperature less than 273.2 K (0°C)
         4 Maximum temperature equal or more than 298.2 K (25°C)
         5 Maximum temperature equal or more than 303.2 K (30°C)
         6 Maximum temperature equal or more than 308.2 K (35°C)
         7 Maximum temperature equal or more than 313.2 K (40°C)
         8 Minimum temperature less than 273.2 K (0°C)
         9 Maximum temperature equal or more than 273.2 K (0°C)
        10 Precipitation equal or more than 1.0 kg/m²
        11 Precipitation equal or more than 5.0 kg/m²
        12 Precipitation equal or more than 10.0 kg/m²
        13 Precipitation equal or more than 50.0 kg/m²
        14 Precipitation equal or more than 100.0 kg/m²
        15 Precipitation equal or more than 150.0 kg/m²
        16 Snow depth more than 0.00 m
        17 Snow depth more than 0.01 m
        18 Snow depth more than 0.10 m
        19 Snow depth more than 0.50 m
        20 Horizontal visibility less than 50 m
        21 Horizontal visibility less than 100 m
        22 Horizontal visibility less than 1000 m
        23 Hail
        24 Thunderstorm
        31 Missing value
     
    25-30 Reserved

    0'08'053 - Day of occurrence qualifier

     C 008053
         0 Value occurred on only one day in the month
         1 Value occurred on more than one day in the month
         2 Reserved
         3 Missing value
    

    0'08'060 - Sample scanning mode significance

     C 008060
         0 Reserved
         1 Range
         2 Azimuth
         3 Horizontal
         4 Vertical
        15 Missing value
     
    5-14 Reserved

    0'08'070 - TOVS/ATOVS product qualifier

     C 008070
         0 Reserved
         1 Reserved
         2 Earth located instrument counts, calibration coefficients and housekeeping (level 1b)
         3 Earth located calibrated radiances (level 1c)
         4 Mapped to a common footprint, Earth located calibrated radiances (level 1d)
        15 Missing value
     
    5-14 Reserved

    0'08'072 - Pixel(s) type

     C 008072
         0 Mixed
         1 Clear
         2 Cloudy
         7 Missing value
     
    3-6 Reserved

    Class 10


    0'10'063 - Characteristics of pressure tendency

     C 010063
         0 Increasing, then decreasing: atmospheric pressure the same or higher than 3 hours ago
         1 Increasing, then steady; or increasing, then more slowly - pressure now higher than 3 hours ago
         2 Increasing (steadily or unsteadily) - pressure now higher than 3 hours ago
         3 Decreasing or steady, then increasing; or increasing, then increasing more rapidly - pressure now higher than 3 hours ago
         4 Steady; atmospheric pressure the same as 3 hours ago
         5 Decreasing; then increasing; atmospheric pressure the same or lower than 3 hours ago
         6 Decreasing, then steady; or decreasing, then decreasing more slowly - pressure now lower than 3 hours ago
         7 Decreasing (steadily or unsteadely) - pressure now lower than 3 hours ago
         8 Steady or increasing, then decreasing; or decreasing, then decreasing more rapidly - pressure now lower than 3 hours ago
        15 Missing
     
    9-14 Reserved

    Notes:

    1. In reports from automatic stations, code figure 2 shall be used when tendency is positive, 7 when negative, and 4 when the pressure is the same as 3 hours before.
    2. In reports from tropical stations reporting 24-hour pressure changes, code figure 2 shall be used when tendency is positive, 7 when negative, and 4 when pressure Is the same as 24 hours before.

    Class 11


    0'11'031 - Degree of turbulence

     C 011031
         0 Nil, in cloud
         1 Light, in cloud
         2 Moderate, in cloud
         3 Severe, in cloud
         4 Nil, in clear air
         5 Light, in clear air
         6 Moderate, in clear air
         7 Severe, in clear air
         8 Nil, cloud/clear air not specified
         9 Light, cloud/clear air not specified
        10 Moderate, cloud/clear air not specified
        11 Severe, cloud/clear air not specified
        12 Extreme, in clear air
        13 Extreme, in cloud
        14 Extreme, cloud/clear air not specified
        15 Missing value
    

    0'11'037 - Turbulence index

    Code figure Average Value of Eddy Dissipation Rate (ave) (m2/3 s-1) Peak Value of Eddy Dissipation Rate (peak) (m2/3 s-1)
     C 011037
         0        ave < 0.1          peak < 0.1
         1        ave < 0.1   0.1 <= peak < 0.2
         2 0.1 <= ave < 0.2   0.1 <= peak < 0.2
         3        ave < 0.1	  0.2 <= peak < 0.3
         4 0.1 <= ave < 0.2	  0.2 <= peak < 0.3
         5 0.2 <= ave < 0.3	  0.2 <= peak < 0.3
         6        ave < 0.1   0.3 <= peak < 0.4
         7 0.1 <= ave < 0.2	  0.3 <= peak < 0.4
         8 0.2 <= ave < 0.3	  0.3 <= peak < 0.4
         9 0.3 <= ave < 0.4	  0.3 <= peak < 0.4
        10        ave < 0.1   0.4 <= peak < 0.5
        11 0.1 <= ave < 0.2   0.4 <= peak < 0.5
        12 0.2 <= ave < 0.3   0.4 <= peak < 0.5
        13 0.3 <= ave < 0.4   0.4 <= peak < 0.5
        14 0.4 <= ave < 0.5   0.4 <= peak < 0.5
        15        ave < 0.1   0.5 <= peak < 0.8
        16 0.1 <= ave < 0.2   0.5 <= peak < 0.8
        17 0.2 <= ave < 0.3   0.5 <= peak < 0.8
        18 0.3 <= ave < 0.4	  0.5 <= peak < 0.8
        19 0.4 <= ave < 0.5   0.5 <= peak < 0.8
        20 0.5 <= ave < 0.8   0.5 <= peak < 0.8
        21        ave < 0.1   0.8 <= peak
        22 0.1 <= ave < 0.2   0.8 <= peak
        23 0.2 <= ave < 0.3   0.8 <= peak
        24 0.3 <= ave < 0.4   0.8 <= peak
        25 0.4 <= ave < 0.5   0.8 <= peak
        26 0.5 <= ave < 0.8   0.8 <= peak
        27 0.8 <= ave         0.8 <= peak
        28 Nil                Nil
        63 Missing value
     
    29-62 Reserved

    0'11'038 - Time of occurrence of peak eddy dissipation rate

    Code figure  Minutes prior to observation time (min)
     C 011038
         0        min < 1
         1   1 <= min < 2
         2   2 <= min < 3
         3   3 <= min < 4
         4   4 <= min < 5
         5   5 <= min < 6
         6   6 <= min < 7
         7   7 <= min < 8
         8   8 <= min < 9
         9   9 <= min < 10
        10  10 <= min < 11
        11  11 <= min < 12
        12  12 <= min < 13
        13  13 <= min < 14
        14  14 <= min < 15
        15	No timing information available
        31	Missing value
     
    16-30 Reserved

    Class 13


    0'13'038 - Superadiabatic indicator

     C 013038
         0 Not superadiabatic
         1 Superadiabatic
         2 Reserved
         3 Missing value
    

    0'13'039 - Terrain type (ice/snow)

     C 013039
         0 Sea ice
         1 Snow on land
         7 Missing value
     
    2-6 Reserved

    0'13'041 - Pasquill-Gifford stability category

     C 013041
         1 A
         2 A-B
         3 B
         4 B-C
         5 C
         6 D
         7 E
         8 F
         9 G
        15 Missing value
     
    10-14 Reserved

    0'13'051 - Frequency group, precipitation

     C 013051
         0 Smaller than any value in the 30-year period
         1 In the first quintile
         2 In the second quintile
         3 In the third quintile
         4 In the fourth quintile
         5 In the fifth quintile
         6 Greater than any value in the 30-year period
        15 Missing value
     
    7-14 Reserved

    Class 19


    0'19'001 - Type of synoptic feature

     C 019001
         0 Depression or low (extratropical)
         1 Tropical depression
         2 Tropical storm
         3 Severe tropical storm
         4 Typhoon
        10 Dust/sandstorm
        63 Missing value
     
    5-9, 11-62 Reserved

    Note: New local names for storms of various strenghts shall be added as necessary.


    0'19'008 - Vertical extent of circulation

     C 019008
         0 Reserved
         1 Shallow (top of circulation below 700-hPa level)
         2 Shallow (top of between 700-hPa and 400-hPa level)
         3 Deep (top above 400-hPa level)
         7 Missing value
     
    4-6 Reserved

    0'19'010 - Method for tracking the centre of synoptic feature code figure

     C 019010
         0 Minimum value of sea level pressure
         1 Maximum value of 850 hPa relative vorticity
        15 Missing value
     
    3-14 Reserved

    Class 20


    0'20'003 - Present weather

    For more details, please check the original WMO table!

    00-49 No precipitation at the station at the time of observation

    50-99 Precipitation at the station at the time of observation

    100-199 Present weather reported from an automatic weather station

    200-299 Present weather (In addition to present weather report from either a manned or an automatic station)

    * The expression "at the station" refers to a land station or a ship.

     C 020003
         0 Cloud development not observed or not observable
         1 Clouds generally dissolving or becoming less developed
         2 State of sky on the whole unchanged
         3 Clouds generally forming or developing
         4 Visibility reduced by smoke, e.g. veldt or forest fires, industrial smoke or volcanic ashes
         5 Haze
         6 Widespread dust in suspension in the air, not raised by wind at or near the station at the time of observation
         7 Dust or sand raised by wind at or near the station at the time of observation, but no well-developed dust whirl(s) or sand whirl(s), and no duststorm or sandstorm seen; or, in the case of sea stations and coastal stations, blowing spray at the station
         8 Well-developed dust whirl(s) or sand whirl(s) seen at or near the station during the preceding hour or at the same time of observation, but no duststorm or sandstorm
         9 Duststorm or sandstorm within sight at the time of observation, or at the station during the preceding hour
        10 Mist
        11 Paches of shallow fog or ice at the station, whether on land or sea, not deeper than about 2 metres on land or 10 metres at sea
        12 More or less continuous shallow fog or ice at the station, whether on land or sea, not deeper than about 2 metres on land or 10 metres at sea
        13 Lightning visible, no thunder heard
        14 Precipitation within sight, not reaching the ground or the surface of the sea
        15 Precipitation within sight, reaching the ground or the surface of the sea, but distant, i.e. estimated to be more than 5 km from the station
        16 Precipitation within sight, reaching the ground or the surface of the sea, near to, but not at the station
        17 Thunderstorm, but no precipitation at the time of observation
        18 Squalls at or within sight of the station during the preceding hour or at the time of observation
        19 Funnel cloud(s)* at or within sight of the station during the preceding hour or at the time of observation
        20 Drizzle (not freezing) or snow grains, not falling as shower(s) - during the preceding hour but not at the time of observation
        21 Rain (not freezing), not falling as shower(s) - during the preeceding hour but not at the time of observation
        22 Snow, not falling as shower(s) - during the preceding hour but not at the time of observation
        23 Rain and snow or ice pellets, not falling as shower(s) - during the preceding hour but not at the time of observation
        24 Freezing drizzle or freezing rain, not falling as shower(s) - during the preceding hour but not at the time of observation
        25 Shower(s) of rain - during the preceding hour but not at the time of observation
        26 Shower(s) of snow, or of rain and snow - during the preceding hour but not at the time of observation
        27 Shower(s) of hail**, or of rain and hail** - during the preceding hour but not at the time of observation
        28 Fog or ice fog - during the preceding hour but not at the time of observation
        29 Thunderstorm (with or without precipitation) - during the preceding hour but not at the time of observation
        30 Slight or moderate duststorm or sandstorm - has decreased during the preceding hour
        31 Slight or moderate duststorm or sandstorm - no appreciable change during the preceding hour
        32 Slight or moderate duststorm or sandstorm - has begun or has inceased during the preceding hour
        33 Severe duststorm or sandstorm - has decreased during the preceding hour
        34 Severe duststorm or sandstorm - no appreciable change during the preceding hour
        35 Severe duststorm or sandstorm - has begun or has increased during the preceding hour
        36 Slight or moderate drifting snow, generally low (below eye level)
        37 Heavy drifting snow, generally low (below eye level)
        38 Slight or moderate blowing snow, generally high (above eye level)
        39 Heavy blowing snow, generally high (above eye level)
        40 Fog or ice fog at a distance at the time of observation, but not at the station during the preceding hour, the fog or ice fog extending to a level above that of the observer
        41 Fog or ice fog in patches
        42 Fog or ice fog, sky visible, has become thinner during the preceding hour
        43 Fog or ice fog, sky invisible, has become thinner during the preceding hour
        44 Fog or ice fog, sky visible, no appreciable change during the preceding hour
        45 Fog or ice fog, sky invisible, no appreciable change during the preceding hour
        46 Fog or ice fog, sky visible, has begun or has become thicker during the preceding hour
        47 Fog or ice fog, sky invisible, has begun or has become thicker during the preceding hour
        48 Fog, depositing rime, sky visible
        49 Fog, depositing rime, sky invisible
        50 Drizzle, not freezing, intermittent, slight at time of observation
        51 Drizzle, not freezing, continuous, slight at time of observation
        52 Drizzle, not freezing, intermittent, moderate at time of observation
        53 Drizzle, not freezing, continuous, moderate at time of observation
        54 Drizzle, not freezing, intermittent, heavy (dense) at time of observation
        55 Drizzle, not freezing, continuous, heavy (dense) at time of observation
        56 Drizzle, freezing, slight
        57 Drizzle, freezing, moderate or heavy (dense)
        58 Drizzle and rain, slight
        59 Drizzle and rain, moderate or heavy
        60 Rain, not freezing, intermittent, slight at time of observation
        61 Rain, not freezing, continuous, slight at time of observation
        62 Rain, not freezing, intermittent, moderate at time of observation
        63 Rain, not freezing, continuous. moderate at time of observation
        64 Rain, not freezing, intermittent, heavy at time of observation
        65 Rain, not freezing, continuous, heavy at time of observation
        66 Rain, freezing, slight
        67 Rain, freezing, moderate or heavy
        68 Rain or drizzle and snow, slight
        69 Rain or drizzle and snow, moderate or heavy
        70 Intermittent fall of snowflakes, slight at time of observation
        71 Continuous fall of snowflakes, slight at time of observation
        72 Intermittent fall of snowflakes, moderate at time of observation
        73 Continuous fall of snowflakes, moderate at time of observation
        74 Intermittent fall of snowflakes, heavy at time of observation
        75 Continuous fall of snowflakes, heavy at time of observation
        76 Diamond dust (with or without fog)
        77 Snow grains (with or without fog)
        78 Isolated star-like snow crystals (with or without fog)
        79 Ice pellets
        80 Rain shower(s), slight
        81 Rain shower(s), moderate or heavy
        82 Rain shower(s), violent
        83 Shower(s) of rain and snow mixed, slight
        84 Shower(s) of rain and snow mixed, moderate or heavy
        85 Snow shower(s), slight
        86 Snow shower(s), moderate or heavy
        87 Shower(s) of snow pellets or small hail, with or without rain or rain and snow mixed - slight
        88 Shower(s) of snow pellets or small hail, with or without rain or rain and snow mixed - moderate or heavy
        89 Shower(s) of hail, with or without rain or rain and snow mixed, not associated with thunder - slight
        90 Shower(s) of hail, with or without rain or rain and snow mixed, not associated with thunder - moderate or heavy
        91 Slight rain at time of observation, thunderstorm during the preceding hour but not at time of observation
        92 Moderate or heavy rain at time of observation, thunderstorm during the preceding hour but not at time of observation
        93 Slight snow, or rain and snow mixed or hail** at time of observation, thunderstorm during the preceding hour but not at time of observation
        94 Moderate or heavy snow, or rain and snow mixed or hail** at time of observation, thunderstorm during preceding hour but not at time of observation
        95 Thunderstorm, slight or moderate, without hail**, but with rain and/or snow at time of observation
        96 Thunderstorm, slight or moderate, with hail** at time of observation
        97 Thunderstorm, heavy, without hail**, but with rain and/or snow at time of observation
        98 Thunderstorm combined with duststorm or sandstorm at time of observation
        99 Thunderstorm, heavy, with hail** at time of observation
       100 No significant weather observed
       101 Clouds generally dissolving or becoming less developed during the past hour
       102 State of sky on the whole unchanged during the past hour
       103 Clouds generally forming or developing during the past hour
       104 Haze or smoke, or dust in suspension in the air, visibility equal to, or greater than, 1 km
       105 Haze or smoke, or dust in suspension in the air, visibility less than 1 km
       110 Mist
       111 Diamond dust
       112 Distant lightning
       118 Squalls
       120 Fog
       121 PRECIPITATION
       122 Drizzle (not freezing) or snow grains
       123 Rain (not freezing)
       124 Snow
       125 Freezing drizzle or freezing rain
       126 Thunderstorm (with or without precipitation)
       127 BLOWING OR DRIFTING SNOW OR SAND
       128 Blowing or drifting snow or sand, visibility equal to, or greater than, 1 km
       129 Blowing or drifting snow or sand, visibility less than 1 km
       130 FOG
       131 Fog or ice fog, in patches
       132 Fog or ice fog, has become thinner during past hour
       133 Fog or ice fog, no appreciable change during past hour
       134 Fog or ice fog, has begun or become thicker during past hour
       135 Fog, depositing rime
       140 PRECIPITATION
       141 Precipitation, slight or moderate
       142 Precipitation, heavy
       143 Liquid precipitation, slight or moderate
       144 Liquid precipitation, heavy
       145 Solid precipitation, slight or moderate
       146 Solid precipitation, heavy
       147 Freezing precipitation, slight or moderate
       148 Freezing precipitation, heavy
       150 DRIZZLE
       151 Drizzle, not freezing, slight
       152 Drizzle, not freezing, moderate
       153 Drizzle, not freezing, heavy
       154 Drizzle, freezing, slight
       155 Drizzle, freezing, moderate
       156 Drizzle, freezing, heavy
       157 Drizzle and rain, slight
       158 Drizzle and rain, moderate or heavy
       160 RAIN
       161 Rain, not freezing, slight
       162 Rain, not freezing, moderate
       163 Rain, not freezing, heavy
       164 Rain, freezing, slight
       165 Rain, freezing, moderate
       166 Rain, freezing, heavy
       167 Rain (or drizzle) and snow, slight
       168 Rain (or drizzle) and snow, moderate or heavy
       170 SNOW
       171 Snow, slight
       172 Snow, moderate
       173 Snow, heavy
       174 Ice pellets, slight
       175 Ice pellets, moderate
       176 Ice pellets, heavy
       180 SHOWER(S) or INTERMITTENT PRECIPITATION
       181 Rain shower(s) or intermittent rain, slight
       182 Rain shower(s) or intermittent rain, moderate
       183 Rain shower(s) or intermittent rain, heavy
       184 Rain shower(s) or intermittent rain, violent
       185 Snow shower(s) or intermittent snow, slight
       186 Snow shower(s) or intermittent snow, moderate
       187 Snow shower(s) or intermittent snow, heavy
       190 THUNDERSTORM
       191 Thunderstorm, slight or moderate, with no precipitation
       192 Thunderstorm, slight or moderate, with rain showers and/or snow showers
       193 Thunderstorm, slight or moderate, with hail
       194 Thunderstorm, heavy, with no precipitation
       195 Thunderstorm, heavy, with rain showers and/or snow showers
       196 Thunderstorm, heavy, with hail
       199 Tornado
       204 Volcanic ash suspended in the air aloft
       206 Thick dust haze, visibility less than 1 km
       207 Blowing spray at the station
       208 Drifting dust (sand)
       209 Wall of dust or sand in distance (like habob)
       210 Snow haze
       211 Whiteout
       213 Lightning, cloud to surface
       217 Dry thunderstorm
       219 Tornado cloud (destructive) at or within sight of the station during preceding hour or at the time of observation
       220 Deposition of volcanic ash
       221 Deposition of dust or sand
       222 Deposition of dew
       223 Deposition of wet snow
       224 Deposition of soft rime
       225 Deposition of hard rime
       226 Deposition of hoar frost
       227 Deposition of glaze
       228 Deposition of ice crust (ice slick)
       230 Duststorm or sandstorm with temperature below 0°C
       239 Blowing snow, impossible to determine whether snow is falling or not
       241 Fog on sea
       242 Fog in valleys
       243 Arctic or Antarctic sea smoke
       244 Steam fog (sea, lake or river)
       245 Steam fog (land)
       246 Fog over ice or snow cover
       247 Dense fog visibility 60-90 m
       248 Dense fog visibility 30-60 m
       249 Dense fog visibility less than 30 m
       250 Drizzle, rate of fall less than 0.10 mm/h
       251 Drizzle, rate of fall 0.10 - 0.19 mm/h
       252 Drizzle, rate of fall 0.20 - 0.39 mm/h
       253 Drizzle, rate of fall 0.40 - 0.79 mm/h
       254 Drizzle, rate of fall 0.80 - 1.59 mm/h
       255 Drizzle, rate of fall 1.60 - 3.19 mm/h
       256 Drizzle, rate of fall 3.20 - 6.39 mm/h
       257 Drizzle, rate of fall 6.4 mm/h or more
       259 Drizzle and snow
       260 Rain, rate of fall less than 1.0 mm/h
       261 Rain, rate of fall 1.0 - 1.9 mm/h
       262 Rain, rate of fall 2.0 - 3.9 mm/h
       263 Rain, rate of fall 4.0 - 7.9 mm/h
       264 Rain, rate of fall 8.0 - 15.9 mm/h
       265 Rain, rate of fall 16.0 - 31.9 mm/h
       266 Rain, rate of fall 32.0 - 63.9 mm/h
       267 Rain, rate of fall 64.0 mm/h or more
       270 Snow, rate of fall less than 1.0 cm/h
       271 Snow, rate of fall 1.0 - 1.9 cm/h
       272 Snow, rate of fall 2.0 - 3.9 cm/h
       273 Snow, rate of fall 4.0 - 7.9 cm/h
       274 Snow, rate of fall 8.0 - 15.9 cm/h
       275 Snow, rate of fall 16.0 - 31.9 cm/h
       276 Snow, rate of fall 32.0 - 63.9 cm/h
       277 Snow, rate of fall 64.0 cm/h or more
       278 Snow or ice cristal precipitation from a clear sky
       279 Wet snow, freezing on contact
       280 Precipitation of rain
       281 Precipitation of rain, freezing
       282 Precipitation of rain and snow mixed
       283 Precipitation of snow
       284 Precipitation of snow pellets or small hail
       285 Precipitation of snow pellets or small hail, with rain
       286 Precipitation of snow pellets or small hail, with rain and snow mixed
       287 Precipitation of snow pellets or small hail, with snow
       288 Precipitation of hail
       289 Precipitation of hail, with rain
       290 Precipitation of hail, with rain and snow mixed
       291 Precipitation of hail, with snow
       292 Shower(s) or thunderstorm over sea
       293 Shower(s) or thunderstorm over mountains
       508 No significant phenomena to report, present and past weather omitted
       509 Not observation, data not available, present and past weather omitted
       510 Present and past weather missing, but expected
       511 Missing value
     
    106-109, 113-117, 119, 136-139, 149, 159, 169, 177-179, 188-189, 197-198, 300-507 Reserved 200-203, 205, 212, 214-216, 218, 229, 231-238, 240, 258, 268-269, 294-299 Not used

    * Tornado cloud or water-spout.
    ** Hail, small hail, snow pellets.

    Notes:

    1. The middle portion of this code table (code figures 100-199) includes terms on several levels to cover simple and increasingly complex automatic stations.
    2. Generic terms for weather (e.g. fog, drizzle) are intended for use at automatic stations capable of determining types of weather but no other information. Generic terms are included in the code table using all capital letters.
    3. Code figures for generic precipitation (code figures 140-148) are arranged in order of increasing complexity. For example, a very simple station that can sense only the presence or absence of precipitation would use code figure 140 (precipitation). At the next level, an automatic station capable of sensing amount but not type would use code figure 141 or 142. An automatic station capable of sensing gross type (liquid, solid, freezing) and amount would use code figures 143-148. An automatic station capable of reporting actual types of precipitation (e.g. drizzle rain), but not the amount, would use the appropriate whole decile number (e.g. 150 for generic drizzle, 160 for generic rain).

    0'20'004 - Past weather (1)

     C 020004
         0 Cloud covering 1/2 or less of the sky throughout the appropriate period
         1 Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period
         2 Cloud covering more than 1/2 of the sky throughout the appropriate period
         3 Sandstorm, duststorm or blowing snow
         4 Fog or ice or thick haze
         5 Drizzle
         6 Rain
         7 Snow, or rain and snow mixed
         8 Shower(s)
         9 Thunderstorm(s) with or without precipitation
        10 No significant weather observed
        11 VISIBILITY REDUCED
        12 Blowing phenomena, visibility reduced
        13 FOG
        14 PRECIPITATION
        15 Drizzle
        16 Rain
        17 Snow or ice pellets
        18 Showers or intermittent precipitation
        19 Thunderstorm
        31 Missing value
     
    20-30 Reserved

    Note: The weather descriptions in code figures 10 to 19 are progressively complex, to accommodate the different levels of weather discrimination capability of various automatic stations. Stations having only basic sensing capability may use the lower code figures and basic generic descriptions (shown in capital letters). Stations with progressively higher discrimination capability shall use the more detailed descriptions (higher codes).


    0'20'005 - Past weather (2)

     C 020005
         0 Cloud covering 1/2 or less of the sky throughout the appropriate period
         1 Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period
         2 Cloud covering more than 1/2 of the sky throughout the appropriate period
         3 Sandstorm, duststorm or blowing snow
         4 Fog or ice or thick haze
         5 Drizzle
         6 Rain
         7 Snow, or rain and snow mixed
         8 Shower(s)
         9 Thunderstorm(s) with or without precipitation
        10 No significant weather observed
        11 VISIBILITY REDUCED
        12 Blowing phenomena, visibility reduced
        13 FOG
        14 PRECIPITATION
        15 Drizzle
        16 Rain
        17 Snow or ice pellets
        18 Showers or intermittent precipitation
        19 Thunderstorm
        31 Missing value
     
    20-30 Reserved

    Note: The weather descriptions in code figures 10 to 19 are progressively complex, to accommodate the different levels of weather discrimination capability of various automatic stations. Stations having only basic sensing capability may use the lower code figures and basic generic descriptions (shown in capital letters). Stations with progressively higher discrimination capability shall use the more detailed descriptions (higher codes).


    0'20'008 - Cloud distribution for aviation

     C 020008
         0 Sky clear
         1 Few
         2 Scattered
         3 Broken
         4 Overcast
         5 Reserved
         6 Scattered/broken
         7 Broken/overcast
         8 Isolated
         9 Isolated embedded
        10 Occasional
        11 Occasional embedded
        12 Frequent
        13 Dense
        14 Layers
        31 Missing
     
    15-30 Reserved

    0'20'009 - General Weather Indicator (TAF/METAR)

     C 020009
         0 Reserved
         1 NSC Nil Significant Cloud
         2 CAVOK
         3 SKC Sky Clear
         4 NSW Nil Significant Weather
        15 Missing
     
    5-14 Reserved

    0'20'011 - Cloud amount

     C 020011
         0 0 oktas (0/10)
         1 1 okta or less, but not zero (1/10 or less, but not zero)
         2 2 oktas (2/10 - 3/10)
         3 3 oktas (4/10)
         4 4 oktas (5/10)
         5 5 oktas (6/10)
         6 6 oktas (7/10 - 8/10)
         7 7 oktas or more, but not 8 oktas (9/10 or more, but not 10/10)
         8 8 oktas (10/10)
         9 Sky obscured by fog and/or other meteorological phenomena
        10 Sky partially obscured by fog and/or other meteorological phenomena
        11 Scattered
        12 Broken
        13 Few
        14 Reserved
        15 Cloud cover is indiscernible for reasons other than fog or other meteorological phenomena, or observation is not made
    

    Notes:

    1. For use of code figure 15, see Regulation 12.1.4.
    2. `Clear' and `overcast' are coded by 0 and 8 respectively.

    0'20'012 - Cloud type

     C 020012
         0 Cirrus (Ci)
         1 Cirrocumulus (Cc)
         2 Cirrostratus (Cs)
         3 Altocumulus (Ac)
         4 Altostratus (As)
         5 Nimbostratus (Ns)
         6 Stratocumulus (Sc)
         7 Stratus (St)
         8 Cumulus (Cu)
         9 Cumulonimbus (Cb)
        10 No CH clouds
        11 Cirrus fibratus, sometimes uncinus, not progressively invading the sky
        12 Cirrus spissatus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a Cumulonimbus; or Cirrus castellanus or floccus
        13 Cirrus spissatus cumulonimbogenitus
        14 Cirrus uncinus or fibratus, or both, progressively invading the sky; they generally thicken as a whole
        15 Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon
        16 Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered
        17 Cirrostratus covering the whole sky
        18 Cirrostratus not progressively invading the sky and not entirely covering it
        19 Cirrocumulus alone, or Cirrocumulus predominant among the CH clouds
        20 No CM clouds
        21 Altostratus translucidus
        22 Altostratus opacus or Nimbostratus
        23 Altocumulus translucidus at a single level
        24 Patches (often lenticular) of Altocumulus translucidus, continually changing and occuring at one or more levels
        25 Altocumulus translucidus in bands, or one or more layers of Altocumulus translucidus or opacus, progressively invading the sky; these Altocumulus clouds generally thicken as a whole
        26 Altocumulus cumulogenitus (or cumulonimbogenitus)
        27 Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus
        28 Altocumulus castellanus or floccus
        29 Altocumulus of chaotic sky, generally at several levels
        30 No CL clouds
        31 Cumulus humilis or Cumulus fractus other than of bad weather*, or both
        32 Cumulus mediocris or congestus, Towering Cumulus (TCU), with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level
        33 Cumulonimbus calvus, with or without Cumulus, Stratocumulus or Stratus
        34 Stratocumulus cumulogenitus
        35 Stratocumulus other than Stratocumulus cumulogenitus
        36 Stratus nebulosus or Stratus fractus other than of bad weather, or both
        37 Stratus fractus or Cumulus fractus of bad weather*, or both (pannus), usually below Altostratus or Nimbostratus
        38 Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels
        39 Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus
        40 CH
        41 CM
        42 CL
        59 Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena
        60 CH clouds invisible owing to darkness, fog, blowing dust or sand, or other similar phenomena, or because of a continuous layer of lower clouds
        61 CM clouds invisible owing to darkness, fog, blowing dust or sand, or other similar phenomena, or because of a continuous layer of lower clouds
        62 CL clouds invisible owing to darkness, fog, blowing dust or sand, or other similar phenomena
        63 Missing value
     
    43-58 Reserved

    * "Bad weather" denotes the conditions which generally exist during precipitation and a short time before and after.


    0'20'017 - Cloud top description

     C 020017
         0 Isolated cloud fragments of cloud
         1 Continuous cloud, flat tops
         2 Broken cloud - small breaks, flat tops
         3 Broken cloud - large breaks, flat tops
         4 Continuous cloud - undulating tops
         5 Broken cloud - small breaks, undulated tops
         6 Broken cloud - large breaks, undulated tops
         7 Continuous or almost continuous waves with towering clouds above the top of the layer
         8 Groups of waves with towering clouds above the top of the layer
         9 Two or more layers at different levels
        15 Missing value
     
    10-14 Reserved

    0'20'018 - Tendency of runway visual range

     C 020018
         0 Increasing (U)
         1 Decreasing (D)
         2 No distinct change (N)
         3 Missing value
    

    0'20'032 - Rate of ice accretion

     C 020032
         0 Ice not building up
         1 Ice building up slowly
         2 Ice building up quickly
         3 Ice melting or breaking up slowly
         4 Ice melting or breaking up rapidly
         5 Reserved
         6 Reserved
         7 Missing value
    

    0'20'033 - Cause of ice accretion

     F 020033
         1 Icing from ocean spray
         2 Icing from fog
         3 Icing from rain
     
    All 4 Missing value

    0'20'034 - Sea ice concentration

     C 020034
         0 No sea ice in sight
         1 Ship in open lead more than 1.0 nautical mile wide, or ship in fast ice with boundary beyond limit of visibility
         2 Sea ice present in concentration less than 3/10 (3/8), open water or very open pack ice, sea ice concentration is uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         3 4/10 to 6/10 (3/8 to less than 6/8), open pack ice, sea ice concentration is uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         4 7/10 to 8/10 (6/8 to less than 7/8), close pack ice, sea ice concentration is uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         5 9/10 or more, but not 10/10 (7/8 to less than 8/8), very close pack ice, sea ice concentration is uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         6 Strips and patches of pack ice with open water between, sea ice concentration is not uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         7 Strips and patches of close or very close pack ice with areas of lesser concentration between, sea ice concentration is not uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         8 Fast ice with open water, very open or open pack ice to seaward of the ice boundary, sea ice concentration is not uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
         9 Fast ice close or very close pack ice to seaward of the ice boundary, sea ice concentration is not uniform in the observation area, ship in ice or within 0.5 nautical mile of ice edge
        14 Unable to report, because of darkness, lack of visibility, or because ship is more than 0.5 nautical mile away from ice edge
        31 Missing value
     
    10-13, 15-30 Reserved

    0'20'035 - Amount and type of ice

     C 020035
         0 No ice of land origin
         1 1-5 icebergs, no growlers or bergy bits
         2 6-10 icebergs, no growlers or bergy bits
         3 11-20 icebergs, no growlers or bergy bits
         4 Up to and including 10 growlers and bergy bits - no icebergs
         5 More than 10 growlers and bergy bits - no icebergs
         6 1-5 icebergs, with growlers and bergy bits
         7 6-10 icebergs, with growlers and bergy bits
         8 11-20 icebergs, with growlers and bergy bits
         9 More than 20 icebergs,with growlers and bergy bits - a major hazard to navigation
        14 Unable to report, because of darkness, lack of visibility or because only sea ice is visible
        15 Missing value
     
    10-13 Reserved

    0'20'036 - Ice situation

     C 020036
         0 Ship in open water with floating ice in sight
         1 Ship in easily penetrable ice; conditions improving
         2 Ship in easily penetrable ice; conditions not changing
         3 Ship in easily penetrable ice; conditions worsening
         4 Ship in ice difficult to penetrate; conditions improving
         5 Ship in ice difficult to penetrate; conditions not changing
         6 Ship in ice difficult to penetrate; conditions worsening. Ice forming and floes freezing together
         7 Ship in ice difficult to penetrate and conditions worsening. Ice under slight pressure
         8 Ship in ice difficult to penetrate and  conditions worsening. Ice under moderate or severe pressure
         9 Ship in ice difficult to penetrate and conditions worsening. Ship beset
        30 Unable to report, because of darkness or lack of visibility
        31 Missing value
     
    10-29 Reserved

    0'20'037 - Ice development

     C 020037
         0 New ice only (frazil ice, grease ice, slush, shuga)
         1 Nilas or ice rind, less than 10 cm thick
         2 Young ice (grey ice, grey-white ice), 10-30 cm thick
         3 Predominantly new and/or young ice with some first-year ice
         4 Predominantly thin first-year ice with some new and/or young ice
         5 All thin first-year ice (30-70 cm thick)
         6 Predominantly medium first-year ice (70-120 cm thick) and thick first-year ice (>120 cm thick) with some thinner (younger) first-year ice
         7 All medium and thick first-year ice
         8 Predominantly medium and thick first-year ice with some old ice (usually more than 2 metres thick)
         9 Predominantly old ice
        30 Unable to report, because of darkness, lack of visibility or because only ice of land origin is visible or because ship is more than 0.5 nautical mile away from ice edge
        31 Missing value
     
    10-29 Reserved

    0'20'041 - Airframe icing

     C 020041
         0 No icing
         1 Light icing
         2 Light icing in cloud
         3 Light icing in precipitation
         4 Moderate icing
         5 Moderate icing in cloud
         6 Moderate icing in precipitation
         7 Severe icing
         8 Severe icing in cloud
         9 Severe icing in precipitation
        10 Trace of icing
        11 Trace of icing in cloud
        12 Trace of icing in precipitation
        13 Reserved
        14 Reserved
        15 Missing value
    

    0'20'062 - State of the ground

  • 0-10: without snow or measurable ice cover
  • 11-19: with snow or measurable ice cover
     C 020062
         0 Surface of ground dry (without cracks and no appreciable amount of dust or loose sand)
         1 Surface of ground moist
         2 Surface of ground wet (standing water in small or large pools on surface)
         3 Flooded
         4 Surface of ground frozen
         5 Glaze on ground
         6 Loose dry dust or sand not covering ground completely
         7 Thin cover of loose dry dust or sand covering ground completely
         8 Moderate or thick cover of loose dry dust or sand covering ground completely
         9 Extremely dry with cracks
        10 Ground predominantly covered by ice
        11 Compact or wet snow (with or without ice) covering less than one-half of the ground
        12 Compact or wet snow (with or without ice) covering at least one-half of the ground but ground not completely covered
        13 Even layer of compact or wet snow covering ground completely
        14 Uneven layer of compact or wet snow covering ground completely
        15 Loose dry snow covering less than one-half of the ground
        16 Loose dry snow covering at least one-half of the ground but ground not completely covered
        17 Even layer of loose dry snow covering ground completely
        18 Uneven layer of loose dry snow covering ground completely
        19 Snow covering ground completely; deep drifts
        31 Missing value
     
    20-30 Reserved

    Notes:

    1. The definitions in code numbers 0 to 2 and 4 apply to representative bare ground and numbers 3, 5 to 9 and 10 to 19 to an open representative area.
    2. In all instances the highest code figures applicable are to be reported.
    3. In the above code table, whenever reference is made to ice, it also includes solid precipitation other than snow.

    0'20'063 - Special phenomena

    (To be developed)


    0'20'071 - Accuracy of fix and rate of atmospherics

    Accuracy of fix (estimated error) - Repetition rate

     C 020071
         0 No assessment                        No assessment
         1 Less than 50 km                      Less than 1 per second
         2 Between 50 and 200 km                Less than 1 per second
         3 More than 200 km                     Less than 1 per second
         4 Less than 50 km                      1 or more per second
         5 Between 50 and 200 km                1 or more per second
         6 More than 200 km                     1 or more per second
         7 Less than 50 km                      Rate so rapid number cannot be counted
         8 Between 50 and 200 km                Rate so rapid number cannot be counted
         9 More than 200 km                     Rate so rapid number cannot be counted
        15 Missing value
     
    10-14 Reserved

    0'20'090 - Special clouds

     C 020090
         0 Reserved
         1 Nacreous clouds
         2 Noctilucent clouds
         3 Clouds from waterfalls
         4 Clouds from fires
         5 Clouds from volcanic eruptions
        15 Missing value
     
    6-14 Reserved

    Class 21


    0'21'066 - Wave scatterometer product confidence data

     F 021066
         1 Processing equipment not working
         2 Equipment failed
         3 PRF code changed during image generation
         4 Sampling window changd during image generation
         5 Gain changed during image generation
         6 Chirp replica exceeds specified value
         7 Input data mean and standard deviation of in-phase and quadrature out of range
         8 Doppler centroid confidence > MMCC value
         9 Doppler centroid absolute value > PRF/2
        10 Doppler ambiguity confidence < MMCC value
        11 Output data mean and standard deviation =< MMCC value
     
    All 12 Missing value

    Notes:

    1. MMCC is Mission Management Control Centre
    2. PRF is Pulse Repitition Frequency

    0'21'067 - Wind product confidence data

     F 021067
         1 No forebeam calculation
         2 No midbeam calculation
         3 No aftbeam calculation
         4 Forebeam arcing detected
         5 Midbeam arcing detected
         6 Aftbeam arcing detected
         7 Any beam noise content above or equal to threshold
         8 Land (any land in cell footprint)
         9 Autonomous ambiguity removal not used
        10 Meteorologicl background not used
        11 Minimum residual exceeded threshold
        12 Frame checksum error detected
     
    All 13 Missing value

    0'21'068 - Radar altimeter product confidence data

     F 021068
         1 Standard deviation of wind speed outside MMCC limit
         2 Standard deviation of significant wave height outside MMCC limit
         3 Standard deviation of altitude outside MMCC limit
         4 Mean peakiness outside MMCC limit
         5 Frame checksum error detected
         6 Height-time loop time constant correction not performed
         7 Not enough measurements (N<10)
     
    All 8 Missing value

    Note: MMCC is Mission Management Control Centre.


    0'21'069 - SST product confidence data

     F 021069
         1 12.0 micrometer channel present in source data
         2 11.0 micrometer channel present in source data
         3  3.7 micrometer channel present in source data
         4  1.6 micrometer channel present in source data
         5 Cloud identification used 1.6 micrometer histogram reflectance cloud test
         6  1.6 micrometer histogram reflectance cloud test used dynamic threshold
         7 Sun glint detected by 1.6 micrometer reflectance cloud test
         8 3.7 micrometer channel used in sea-surface temperature retrieval
         9 Sea-surface temperature derivation used daytime data (night-time if zero)
     
    All 10 Missing value

    0'21'070 - SST product confidence data (SADIST-2)

      1- 9 Nadir-only view SST retrieval used 3.7 micron channel (one bit per 10-arcmin cell)
     10-18 Dual view SST retrieval used 3.7 micron channel (one bit per 10-arcmin cell)
     F 021070
         1 Cell 1:nadir-only view SST used 3.7 micron channel
         2 Cell 2:nadir-only view SST used 3.7 micron channel  Cell numbering:
         3 Cell 3:nadir-only view SST used 3.7 micron channel    NW       NE
         4 Cell 4:nadir-only view SST used 3.7 micron channel       7 8 9
         5 Cell 5:nadir-only view SST used 3.7 micron channel       4 5 6
         6 Cell 6:nadir-only view SST used 3.7 micron channel       1 2 3
         7 Cell 7:nadir-only view SST used 3.7 micron channel    SW       SE
         8 Cell 8:nadir-only view SST used 3.7 micron channel
         9 Cell 9:nadir-only view SST used 3.7 micron channel
        10 Cell 1:nadir-only view SST used 3.7 micron channel
        11 Cell 2:nadir-only view SST used 3.7 micron channel  Cell numbering:
        12 Cell 3:nadir-only view SST used 3.7 micron channel    NW       NE
        13 Cell 4:nadir-only view SST used 3.7 micron channel       7 8 9
        14 Cell 5:nadir-only view SST used 3.7 micron channel       4 5 6
        15 Cell 6:nadir-only view SST used 3.7 micron channel       1 2 3
        16 Cell 7:nadir-only view SST used 3.7 micron channel    SW       SE
        17 Cell 8:nadir-only view SST used 3.7 micron channel
        18 Cell 9:nadir-only view SST used 3.7 micron channel
        19 Nadir view contains day-time data (night if zero)
        20 Forward view contains day-time data (night if zero)
        21 Record contains contributions from instrument scans acquired when ERS platform not in yaw-steering mode
        22 Record contains contributions from instrument scans for which Product Confidence Data show quality is poor or unknown
     
    All 23 Missing value

    0'21'072 - Satellite altimeter calibration status

     F 021072
         1 Height error correction applied instead of open loop calibration
         2 Microwave sounder used for troposphere correction
         3 AGC output correction applied instead of open loop calibration
     
    All 4 Missing value

    0'21'073 - Satellite altimeter instrument mode

     F 021073
         1 Blank data record
         2 Test
         3 Calibration (closed loop)
         4 BITE
         5 Acquisition on ice
         6 Acquisition on ocean
         7 Tracking on ice
         8 Tracking on ocean
     
    All 9 Missing value

    0'21'076 - Representation of intensities

     C 021076
         0 Linear
         1 Logarithmic (base e)
         2 Logarithmic (base 10)
         7 Missing value
     
    3-6 Reserved

    0'21'109 - SEAWINDS wind vector call quality

     F 021109
         1 Not enough good sigma-0 available for wind retrieval
         2 Poor azimuth diversity among sigma-0 for wind retrieveal
         8 Some portion of wind vector cell is over land
         9 Some portion of wind vector cell is over ice
        10 Wind retrieval not performed for wind vector cell
        11 Reported wind speed is greater than 30 m s-1
        12 Reported wind speed is less than or equal to 3 m s-1
     
    3-7, 13-16 Reserved All 17 Missing value

    0'21'115 - SEAWINDS sigma-0 quality

     F 021115
         1 Sigma-0 measurement is not usable
         2 Signal to noise ratio is low
         3 Sigma-0 is negative
         4 Sigma-0 is outside of acceptable range
         5 Scatterometer pulse quality is not acceptable
         6 Sigma-0 cell location algorithm does not converge
         7 Frequency shift lies beyond the range of the x factor table
         8 Spacecraft temperature is beyond calibration coefficient range
         9 No applicable altitude records were found for this sigma-0
        10 Interpolated ephemeris data are not acceptable for this sigma-0
     
    11-16 Reserved All 17 Missing value

    0'21'116 - SEAWINDS sigma-0 mode

     F 021116
         1 Calibration/measurement pulse flag (1)
         2 Calibration/measurement pulse flag (2)
         3 Outer antenna beam
         4 Sigma-0 cell is aft of spacecraft
         5 Current mode (1)
         6 Current mode (2)
         7 Effective gate width - slice resolution (1)
         8 Effective gate width - slice resolution (2)
         9 Effective gate width - slice resolution (3)
        10 Low resolution mode - whole pulse data
        11 Scatterometer electronic subsystem B
        12 Alternate spin rate - 19.8 rpm
        13 Receiver protection on
        14 Slices per composite flag (1)
        15 Slices per composite flag (2)
        16 Slices per composite flag (3)
     
    All 17 Missing value

    0'21'119 - Wind scatterometer geophysical model function

     C 021119
         0 Reserved
         1 SASS
         2 SASS2
         3 NSCAT0
         4 NSCAT1
         5 NSCAT2
         6 QSCAT0
         7 QSCAT1
        31 CMOD1
        32 CMOD2
        33 CMOD3
        34 CMOD4
        35 CMOD5
        63 Missing value
     
    8-30 & 36-62 Reserved

    Class 22


    0'22'061 - State of the sea

     C 022061
         0 Calm (glassy)      0
         1 Calm (rippled)     0    -  0.1
         2 Smooth (wavelets)  0.1  -  0.5
         3 Slight             0.5  -  1.25
         4 Moderate           1.25 -  2.5
         5 Rough              2.5  -  4
         6 Very rough         4    -  6
         7 High               6    -  9
         8 Very high          9    - 14
         9 Phenomenal           Over 14
        15 Missing value
     
    10-14 Reserved

    Notes:

    1. These values refer to well-developed wind waves of the open sea. While priority shall be given to the descriptive terms, these height values may be used for guidance by the observer when reporting the total state of agitation of the sea resulting from various factors such as wind, swell, currents, angle between swell and wind, etc.
    2. The exact bounding height shall be assigned for the lower code figure; e.g., a height of 4 m is coded as 5.

    0'22'067 - Instrument type for water temperature profile measurement with fall rate equation coefficients

    Instrument make - Equation coefficients a and b

     C 022067
        1 Sippican T-4        6.472	-2.16
        2 Sippican T-4        6.691	-2.25
       11 Sippican T-5        6.828	-1.82
       21 Sippican Fast Deep  6.346	-1.82
       31 Sippican T-6        6.472	-2.16
       32 Sippican T-6        6.691	-2.25
       41 Sippican T-7        6.472	-2.16
       42 Sippican T-7        6.691	-2.25
       51 Sippican Deep Blue  6.472	-2.16
       52 Sippican Deep Blue  6.691	-2.25
       61 Sippican T-10       6.301	-2.16
       71 Sippican T-11       1.779	-0.255
      201 TSK T-4             6.472	-2.16
      202 TSK T-4             6.691	-2.25
      211 TSK T-6             6.472	-2.16
      212 TSK T-6             6.691	-2.25
      221 TSK T-7             6.472	-2.16
      222 TSK T-7             6.691	-2.25
      231 TSK T-5             6.828	-1.82
      241 TSK T-10            6.301	-2.16
      251 TSK Deep Blue       6.472	-2.16
      252 TSK Deep Blue       6.691	-2.25
      261 TSK AXBT
      401 Sparton XBT-1       6.301	-2.16
      411 Sparton XBT-3       5.861	-0.0904
      421 Sparton XBT-4       6.472	-2.16
      431 Sparton XBT-5       6.828	-1.82
      441 Sparton XBT-5DB     6.828	-1.82
      451 Sparton XBT-6       6.472	-2.16
      461 Sparton XBT-7       6.472	-2.16
      462 Sparton XBT-7       6.705	-2.28
      471 Sparton XBT-7DB     6.472	-2.16
      481 Sparton XBT-10      6.301	-2.16
      491 Sparton XBT-20      6.472	-2.16
      501 Sparton XBT-20DB    6.472	-2.16
      510 Sparton 536 AXBT    1.524	0
      700 Sippican XCTD standard
      710 Sippican XCTD deep
      720 Sippican AXCTD
      730 Sippican SXCTD
      741 TSK XCTD
      751 TSK AXCTD
      800 Mechanical BT       Not applicable
      810 Hydrocast           Not applicable
      820 Thermistor Chain    Not applicable
      830 CTD                 Not applicable
      831 CTD-P-ALACE float   Not applicable
      840 PROVOR              No conductivity sensor
      841 PROVOR              Seabird conductivity sensor
      842 PROVOR              FSI conductivity sensor
      845 Web Research        No conductivity sensor
      846 Web Research        Seabird conductivity sensor
      847 Web Research        FSI conductivity sensor
      850 SOLO                No conductivity sensor
      851 SOLO                Seabird conductivity sensor
      852 SOLO                FSI conductivity sensor
     
    853-1023 Reserved

    Notes:

    1. The depth is calculated from coefficients a and b and the time t as follows:
            z = a*t + (10**-3) * bt**2
    2. All unassigned numbers are reserved for future use.
    3. The values of a and b are supplied for information only.

    0'22'068 - Water temperature profile recorder types

     C 022068
         1 Sippican Strip Chart Recorder
         2 Sippican MK2A/SSQ-61
         3 Sippican MK-9
         4 Sippican AN/BHQ-7/MK8
         5 Sippican MK-12
        10 Sparton SOC BT/SV Processor Model 100
        11 Lockheed-Sanders Model OL5005
        20 ARGOS XBT-ST
        21 CLS-ARGOS / Protecno XBT-ST Model-1
        22 CLS-ARGOS / Protecno XBT-ST Model-2
        30 BATHY Systems SA-810
        31 Scripps Metrobyte Controller
        32 Murayama Denki Z-60-16 III
        33 Murayama Denki Z-60-16 II
        34 Protecno ETSM2
        35 Nautilus Marine Service NMS-XBT
        40 TSK MK-2A
        41 TSK MK-2S
        42 TSK MK-30
        43 TSK MK-30N
        45 TSK MK-100
        46 TSK MK-130 Compatible recorder for both XBT and XCTD
        48 TSK AXBT RECEIVER MK-300
        50 JMA ASTOS
        60 ARGOS communications, sampling on up transit
        61 ARGOS communications, sampling on down transit
        62 Orbcomm communications, sampling on up transit
        63 Orbcomm communications, sampling on down transit
        99 Unknown
       127 Missing value
    

    Note: All unassigned numbers are reserved for future use.


    0'22'120 - Tide station automated water level check

     C 022120
         0 Good data
         1 Maximum (high) water level limit exceeded
         2 Minimum (low) water level limit exceeded
         3 Rate of change limit for water level exceeded
         4 Flat limit for water level exceeded
         5 Observed minus predicted water level value limit exceeded
         6 Observed value from primary water level sensor minus backup water level sensor
         7 Value exceeded specified tolerance from expected value
         8 Water level QA parameter (sigmas and/or outliers) limits exceeded
         9 Sea temperature outside of expected range
        10 Multiple QC checks (above) failed
        11 No automated water level checks performed
        31 Missing value
     
    12-30 Reserved

    0'22'121 - Tide station manual water level check

     C 022121
         0 Operational
         1 Possible clogging problem or otherwise degraded water level data
         2 Possible datum shift
         3 Unknown status of water level sensor
         4 Suspected or known sea temperature sensor problem
         5 Multiple possible problems (above)
         6 Bad data - DO NOT DISSEMINATE!
         7 No manual water level checks performed
        31 Missing value
     
    8-30 Reserved

    0'22'122 - Tide station automated meteorological data check

     C 022122
         0 Good data from all sensors
         1 Wind direction outside of allowable range
         2 Wind speed outside of expected range
         3 Barometric pressure outside of expected range
         4 Air temperature outside of expected range
         5 Multiple sensors failed QC checks
         6 No automated meteorological data checks performed
        31 Missing value
     
    7-30 Reserved

    0'22'123 - Tide station manual meteorological data check

     C 022123
         0 Operational
         1 Suspected or known problem with wind sensor
         2 Suspected or known problem with barometric pressure sensor
         3 Suspected or known problem with air temperature sensor
         4 Unknown status of all sensors
         5 Suspected or known problems with multiple sensors
         6 Bad data - DO NOT DISSEMINATE!
         7 No manual meteorological data checks performed
        31 Missing value
     
    8-30 Reserved

    Class 23


    0'23'001 - Accident early notification - article applicable

     C 023001
         0 Reserved
         1 Articles 1 and 2
         2 Article 3
         3 Article 5.2
         7 Missing value
    

    0'23'002 - Activity or facility involved in incident

     C 023002
         0 Reserved
         1 Nuclear reactor on ground
         2 Nuclear reactor at sea
         3 Nuclear reactor in space
         4 Nuclear fuel facility
         5 Radioactive waste management facility
         6 Transport of nuclear fuel or radioactive waste
         7 Storage of nuclear fuel or radioactive waste
         8 Manufacture of radio-isotopes
         9 Use of radio-isotopes
        10 Storage of radio-isotopes
        11 Disposal of radio-isotopes
        12 Transport of radio-isotopes
        13 Use of radio-isotopes for power generation
        30 Other
        31 Missing data
     
    14-29 Reserved

    0'23'003 - Type of release

     C 023003
         0 No release
         1 Release to atmosphere
         2 Release to water
         3 Release to both atmosphere and water
         4 Expected release to atmosphere
         5 Expected release to water
         6 Expected release to both atmosphere and water
         7 Missing value
    

    0'23'004 - Countermeasures taken near border

     C 023004
         0 No countermeasures
         1 Evacuation
         2 Sheltering
         3 Prophylaxis
         4 Water
         7 Missing value
     
    5-6 Reserved

    0'23'005 - Cause of the incident

     C 023005
         0 Incident State does not understand what happened
         1 Incident State knows the cause of the incident
         2 Reserved
         3 Missing value
    

    0'23'006 - Incident situation

     C 023006
         0 No improvement
         1 Unstable
         2 No detoriation
         3 Improving
         4 Stable
         5 Deteriorating
         6 Reserved
         7 Missing value
    

    0'23'007 - Characteristics of release

     C 023007
         0 No release
         1 Release has stopped
         2 Release
         3 Release is continuing
         7 Missing value
     
    4-6 Reserved

    0'23'008 - State of current or expected release

     C 023008
         0 Gaseous
         1 Particulate
         2 Mixture of gaseous and particulate
         3 Missing value
    

    0'23'009 - State of current or expected release

     C 023009
         0 Gaseous
         1 Particulate
         2 Mixture of gaseous and particulate
         3 Missing value
    

    0'23'016 - Possibility of significant chemical toxic health effect

     C 023016
         0 No significant chemical toxic health effect
         1 Significant chemical toxic health effect
         2 Reserved
         3 Missing value
    

    0'23'018 - Release behiaviour over time

     C 023018
         0 Release no longer occurring
         1 Release still occurring
         2 Release expected to increase in next six hours
         3 Release expected to remain constant in next six hours
         4 Release expected to decrease in next six hours
         7 Missing value
     
    5-6 Reserved

    0'23'031 - Possibility that plume will encounter precipitation in State in which incident occurred

     C 023031
         0 Plume will not encounter precipitation in incident State
         1 Plume will encounter precipitation in incident State
         2 Reserved
         3 Missing value
    

    0'23'032 - Plume will encounter change in wind direction and/or speed

     C 023032
         0 No significant change expected within the next six hours
         1 Anticipated significant change expected within the next six hours
         2 Reserved
         3 Missing value
    

    Class 24


    0'24'003 - Composition of release

     C 024003
         0 Noble gases
         1 Iodines
         2 Caesium
         3 Transuranics
        31 Missing value
     
    4-30 Reserved

    Class 25


    0'25'004 - Echo processing

     C 025004
         0 Incoherent
         1 Coherent (Doppler)
         2 Reserved
         3 Missing value
    

    0'25'005 - Echo integration

     C 025005
         0 Logarithm - 2.5 dB
         1 Linear
         2 Special
         3 Missing value
    

    0'25'006 - Z to R conversion

     C 025006
         0 ZH to R conversion
         1 (ZH,ZDR) to (NO,DO) to R
         2 (Z(F1),Z(F2)) to attenuation to R
         6 Other
         7 Missing value
     
    3-5 Reserved

    0'25'009 - Calibration method

     F 025009
         1 None
         2 Calibration target or signal
         3 Against raingauges
         4 Against other instruments (distrometer - attenuation)
     
    All 4 Missing value

    0'25'010 - Clutter treatment

     C 025010
         0 None
         1 Map
         2 Insertion of higher elevation data and map
         3 Analysis of the fluctuating logarithm signal (clutter detection)
         4 Extraction of the fluctuating part of the signal (clutter suppression)
         5 Clutter suppression - Doppler
         6 Multiparameter analysis
        15 Missing value
     
    7-14 Reserved

    0'25'011 - Ground occultation correction (screening)

     C 025011
         0 None
         1 Map of correction factors
         2 Interpolation (azimuth or elevation)
         3 Missing value
    

    0'25'012 - Range attenuation correction

     C 025012
         0 Hardware
         1 Software
         2 Hardware and software
         3 Missing value
    

    0'25'013 - Bright-band correction

     F 025013
         1 Bright-band correction
     
    All 2 Missing value

    0'25'015 - Radome attenuation correction

     F 025015
         1 Radome attenuation correction
     
    All 2 Missing value

    0'25'017 - Precipitation attenuation correction

     F 025017
         1 Precipitation attenuation correction
     
    All 2 Missing value

    0'25'020 - Mean speed estimation

     C 025020
         0 FFT (fast Fourier transform)
         1 PPP (pulse-pair processing)
         2 VPC (vector-phase shange)
         3 Missing value
    

    0'25'021 - Wind computation enhancement

     F 025021
         1 Simple average
         2 Consensus average
         3 Median check
         4 Vertical consistency check
         5 Other
     
    6-7 Reserved All 8 Missing value

    0'25'030 - Running mean sea-surface temperature usage

     C 025030
         0 Running mean sea-surface temperature not used because usage criteria not met
         1 Running mean sea-surface temperature not used because data not available
         2 Running mean sea-surface temperature used as predictor
         3 Missing value
    

    0'25'032 - NOAA wind profiler information

     C 025032
         0 Reserved
         1 Data from low mode
         2 Data from high mode
         3 Missing value
    

    0'25'033 - NOAA wind profiler submode information

     C 025033
         0 Wind profiler operating in submode A
         1 Wind profiler operating in submode B
         2 Reserved
         3 Missing value
    

    0'25'034 - NOAA wind profiler quality control test results

    Meaning (1 = true, 0 = false)

     F 025034
         1 Test A performed and failed
         2 Test B performed and failed
         3 Test results inconclusive
         4 Reserved
     
    All 4 Missing value

    0'25'036 - Atmospherics location method

     C 025036
         0 Network of several direction-finders operating on the same individual atmospherics
         1 Network of several arrival-time stations operating on the same individual atmospherics
         6 Single station range bearing technique
        15 Missing value
     
    2-5 and 7-14 Reserved

    0'25'040 - CO2 wind product derivation

     C 025040
         0 Non-specific mode
         1 First guess data
         2 Cloud data
         3 Average vector data
         4 Primary data
         5 Guess data
         6 Vector data
         7 Tracer data; this image
         8 Tracer data to next image
        15 Missing value
     
    9-14 Reserved

    0'25'041 - Moving platform direction reporting method

     C 025041
         0 Direction originally reported in true degrees
         1 Direction originally reported using Code table 0700, FM 13
         2 Reserved
         3 Missing value
    

    NOTE: Where the original reporting method is as indicated by code figure 1, the following conversion is reccommended to obtain a suitable data value corresponding to descriptor 0'01'012:

    Reported value	Data value
    	0	0
    	1	45
    	2	90
    	3	135
    	4	180
    	5	225
    	6	270
    	7	315
    	8	360
    	9	511
    

    0'25'042 - Moving platform speed reporting method

     C 025042
         0 Speed originally reported in metres per second
         1 Speed originally reported using Code table 4451, FM 13
         2 Reserved
         3 Missing vallue
    

    NOTE: Where the original reporting method is as indicated by code figure 1, the following conversion is recommended to obtain a suitable data value corresponding to descriptor 0'01'013:

    Reported value	Data value
    	0	0
    	1	1
    	2	4
    	3	7
    	4	9
    	5	12
    	6	14
    	7	17
    	8	19
    	9	21
    	/	1023
    

    0'25'045 - HIRS channel combination

     F 025045
         1-20 Beginning with first bit position (high order bit),
              if bit position is set to 1, then channel is present,
              if bit position is set to 0, then channel is not present
     
    All 21 Missing value

    0'25'046 - MSU channel combination

     F 025046
         1-4 Beginning with first bit position (high order bit),
             if bit position is set to 1, then channel is present,
             if bit position is set to 0, then channel is not present
     
    All 5 Missing value

    0'25'047 - SSU channel combination

     F 025047
         1-3 Beginning with first bit position (high order bit),
             if bit position is set to 1, then channel is present,
             if bit position is set to 0, then channel is not present
     
    All 4 Missing value

    0'25'048 - AMSU-A channel combination

     F 025048
         1-15 Beginning with first bit position (high order bit),
              if bit position is set to 1, then channel is present,
              if bit position is set to 0, then channel is not present
     
    All 16 Missing value

    0'25'049 - AMSU-B channel combination

     F 025049
         1-5 Beginning with first bit position (high order bit),
             if bit position is set to 1, then channel is present,
             if bit position is set to 0, then channel is not present
     
    All 6 Missing value

    0'25'051 - AVHRR channel combination

     F 025051
         1-6 Beginning with first bit position (high order bit),
             if bit position is set to 1, then channel is present,
             if bit position is set to 0, then channel is not present
     
    All 7 Missing value

    0'25'053 - Observation quality

     F 025053
         1 Good
         2 Redundant
         3 Questionable
         4 Bad
         5 Experimantal
         6 Precipitating
     
    7-11 Reserved
    All 12 Missing value

    0'25'086 - Depth correction indicator

     C 025086
         0 Depths are not corrected
         1 Depths are corrected
         2 Reserved
         3 Missing value
    

    0'25'093 - RASS computation correction

     F 025093
         1 No correction
         2 Vertical velocity correction
         7 All corrections
     
    3-6 Reserved
    All 8 Missing value

    Class 26


    0'26'010 - Hours included

     F 026010
         1 0100 included
         2 0200 included
         3 0300 included
         4 0400 included
         5 0500 included
         6 0600 included
         7 0700 included
         8 0800 included
         9 0900 included
        10 1000 included
        11 1100 included
        12 1200 included
        13 1300 included
        14 1400 included
        15 1500 included
        16 1600 included
        17 1700 included
        18 1800 included
        19 1900 included
        20 2000 included
        21 2100 included
        22 2200 included
        23 2300 included
        24 2400 included
        25 Unknown mixture of hours
     
    All 26 Missing value

    Class 29


    0'29'001 - Projection type

     C 029001
         0 Gnomonic projection
         1 Polar stereographic projection
         2 Lambert's conformal conic projection
         3 Mercator's projection
         4 Scanning cone (radar)*
         7 Missing value
     
    5-6 Reserved

    0'29'002 - Coordinate grid type

     C 029002
         0 Cartesian
         1 Polar
         2 Other
         7 Missing value
     
    3-6 Reserved

    Class 30


    0'30'031 - Picture type

     C 030031
         0 PPI
         1 Composite
         2 CAPPI
         3 Vertical section
         4 Alphanumeric data
         5 Map of subject clutter
         6 Map
         7 Test picture
         8 Comments
         9 Map of ground occultation
        10 Map of radar beam height
        14 Other
        15 Missing value
     
    11-13 Reserved

    0'30'032 - Combination with other data

     F 030032
         1 Map
         2 Satellite IR
         3 Satellite VIS
         4 Satellite WV
         5 Satellite multispectral
         6 Synoptic observations
         7 Forecast parameters
         8 Lightning data
        15 Other data
     
    9-14 Reserved All 16 Missing value

    Class 31


    0'31'021 - Associated field significance

     C 031021
         0 Reserved
         1 1-bit indicator of quality; 0=good, 1=suspect or bad
         2 2-bit indicator of quality; 0=good, 1=slightly suspected, 2=highly suspected, 3=bad
         7 Percentage confidence
        21 1-bit indicator of correction (see Note 2); 0=original value, 1=substituted/corrected value
        63 Missing value
     
    3-6, 8-20 Reserved 22-62 Reserved for local use

    N o t e s

    1. Associated field significance shall be used initially in conjunction with the quality of observed data.
    2. The code figure 21 may be used within corrected messages with the corrected/ substituted values identified.
    3. Further applications may be developed.

    0'31'031 - Data present indicator

     C 031031
         0 Data present
         1 Data not present
    

    Class 33


    0'33'002 - Quality information

     C 033002
         0 Data not suspect
         1 Data suspect
         2 Reserved
         3 Quality information not given
    

    0'33'003 - Quality information

     C 033003
         0 Data not suspect
         1 Data slightly suspect
         2 Data highly suspect
         3 Data considered unfit for use
         7 Quality information not given
     
    4-6 Reserved

    0'33'020 - Quality control indication of following value

     C 033020
         0 Good
         1 Inconsistent
         2 Doubtful
         3 Wrong
         4 Not checked
         5 Has been changed
         6 Reserved
         7 Missing value
    

    0'33'021 - Quality of following value

     C 033021
         0 Within limits
         1 Outside limits
         2 Reserved
         3 Missing value
    

    0'33'022 - Quality of buoy satellite transmission

     C 033022
         0 Good (several identical reports have been received)
         1 Dubious (no identical reports have been received)
         2 Reserved
         3 Missing value
    

    0'33'023 - Quality of buoy location

     C 033023
         0 Reliable (location was made over two satellite passes)
         1 Latest known (no location over the corresponding pass)
         2 Dubious (location made over one pass only; a second solution is possible in 5 per cent of the cases)
         3 Missing value
    

    0'33'024 - Station elevation quality mark (for mobile stations)

     C 033024
         0 Reserved
         1 Excellent - within 3 meters
         2 Good - within 10 meters
         3 Fair - within 20 meters
         4 Poor - more than 20 meters
         5 Excellent - within 10 feet
         6 Good - within 30 feet
         7 Fair - within 60 feet
         8 Poor - more than 60 feet
        15 Missing value
     
    9-14 Reserved

    0'33'025 - ACARS interpolated values

     C 033025
         0 Time interpolated, latitude and longitude reported
         1 Time reported, latitude and longitude interpolated
         2 Time, latitude, and longitude interpolated
         3 Time, latitude, and longitude reported
         7 Missing value
     
    4-6 Reserved

    0'33'026 - Moisture quality

     C 033026
         0 Normal operations - measurement mode
         1 Normal operations - non-measurement mode
         2 Small RH
         3 Humidity element is wet
         4 Humidity element contaminated
         5 Heater fail
         6 Heater fail and wet/contaminated humidity element
         7 At least one of the input parameters used in the calculation of mixing ratio is invalid
         8 Numeric error
         9 Sensor not installed
        63 Missing value
     
    10-62 Reserved

    0'33'027 - Location quality class (range of radius of 66% confidence)

     C 033027
         0 Radius >= 1500 m
         1 500 m <= Radius < 1500 m
         2 250 m <= Radius < 500 m
         3 Radius < 250 m
         7 Missing value
     
    4-6 Reserved

    0'33'030 - Scan line status flags for ATOVS

     F 033030
         1 Do not use scan for product generation
         2 Time sequence error detected with this scan
         3 Data gap precedes this scan
         4 No calibration
         5 No Earth location
         6 First good time following a clock update
         7 Instrument status changed with this scan
     
    8-23 Reserved All 24 Missing value

    Notes: If bit is set to 1 then statement is true.


    0'33'031 - Scan line quality flags for ATOVS

     F 033031
         1 Time field is bad but can probably be inferred from the previous good time
         2 Time field is bad and can't be inferred from the previous good time
         3 This record starts a sequence that is inconsistent with previous times (i.e. there is a time discontinuity). This may or may not be associated with a spacecraft clock update (see scan line status flags for ATOVS)
         4 Start of a sequence that apparently repeats scan times that have been previously accepted
         5 Scan line was not calibrated because of bad time
         6 Scan line was calibrated using fewer than the preferred number of scan lines because of proximity to start or end of data or to a data gap
         7 Scan line was not calibrated because of bad or insufficient PRT data
         8 Scan line was calibrated but with marginal PRT data
         9 Some uncalibrated channels on this scan
        10 Uncalibrated due to instrument mode
        11 Questionable calibration because of antenna position error of space view
        12 Questionable calibration because of antenna position error of black body
        13 Not Earth located because of bad time
        14 Earth location questionable because of questionable time code (see time problem code bits)
        15 Earth location questionable - only marginal agreement with reasonableness check
        16 Earth location questionable - fails reasonableness check
        17 Earth location questionable because of antenna position check
        18 Scan line calibration cold black body
        19 Scan line calibration warm black body
        20 Scan line calibration space view
        21 Earth view
     
    22-23 Reserved All 24 Missing value

    Notes:

    1. If bit is set to 1 then statement is true.
    2. Bits 1-4 represent TIME PROBLEM CODE. All bits off implies the scan time is as expected.
    3. Bits 5-10 represent CALIBRATION PROBLEM CODE. All bits set to zero indicates normal calibration. Where any of bits 5,7,10 are set, secondary calibration coefficients have been used.
    4. Bits 11-17 represent EARTH LOCATION PROBLEM CODE. All bits set to zero implies the earth location was normal.

    0'33'032 - Channel quality flags for ATOVS

     F 033032
         1 No good blackbody counts for scan line
         2 No good space view counts for this line
         3 No good PRTs for this line
         4 Some bad blackbody view counts for this line
         5 Some bad space view counts for this line
         6 Some bad PRT temps on this line
     
    7-23 Reserved (bits set to zero) All 24 Missing value

    Notes: All bits off implies a good calibration


    0'33'033 - Field of view quality flags for ATOVS

     F 033033
         1 Set if secondary calibration used
        22 Set if all the channels are missing
        23 Suspect
      2-21 Bit n set to 1 if brightness temperature in channel n-1 is physically
           unreasonable or has not been calculated due to calibration problems
     
    All 24 Missing value

    Notes:

    1. All bits off implies a good calibration.
    2. Bits 2-21 used for HIRS, but only bits 2-16 used for AMSU-A and only bits 2-6 used for AMSU-B

    0'33'035 - Manual/automatic quality control

     C 033035
         0 Automatic quality control passed and not manually checked
         1 Automatic quality control passed and manually checked and passed
         2 Automatic quality control passed and manually checked and deleted
         3 Automatic quality control failed and manually not checked
         4 Automatic quality control failed and manually checked and failed
         5 Automatic quality control failed and manually checked and re-inserted
        15 Missing value
     
    6-14 Reserved

    0'33'037 - Wind correlation error

     F 033037
         1 U departure from guess
         2 V departure from guess
         3 U and V departure from guess
         4 U acceleration
         5 V acceleration
         6 U and V acceleration
         7 Possible land feature
         8 U acceleration and possible land feature
         9 V acceleration and possible land feature
        10 U and V acceleration and possible land feature
        11 Bad wind guess
        12 Correlation failure
        13 Search box off edge of area
        14 Target box off edge of area
        15 Pixel brightness out of bounds (noisy line)
        16 Target outside of latitude/longitude box
        17 Target outside of pressure minimum/maximum
        18 Autoeditor flagged slow vector
        19 Autoeditor flagged vectors
     
    All 20 Missing value

    0'33'041 - Attribute of following value

     C 033041
         0 The following value is the true value
         1 The following value is higher than the true value (the measurement hit the lower limit of the instrument)
         2 The following value is lower than the true value (the measurement hit the higher limit of the instrument)
         3 Missing value
    

    NOTE: This descriptor will be associated with visibility data or height of cloud data to specify if the value is bounded. If the reported data is the true value, the code figure is 0. However, the measurement can hit the limit of the instrument measurement capability. If the reported value is higher than the true value, the code figure is 1; if the reported value is lower than the true value, the code figure is 2.


    Class 35


    0'35'000 - FM and Regional Code number

     C 035000
       000-099 International FM Codes
       100-199 RA I Codes
       200-299 RA II Codes
       300-399 RA III Codes
       400-499 RA IV Codes
       500-599 RA V Codes
       600-699 RA VI Codes
       700-799 Antarctic Codes
       800-999 Reserved
       1000-1022 Not used
       1023 Missing value
    

    0'35'001 - Time-frame for monitoring

     C 035001
         0 Real time
         1 Near-real time
         2 Non-real time
         7 Missing value
     
    3-6 Reserved

    0'35'030 - Discrepancies in the availability of expected data

     C 035030
         0 No discrepancies
         1 Non-compliance with standard and recommended practices and procedures including those of monitoring
         2 Catalogues of meteorological bulletins not updated in a timely manner
         3 Incorrect routeing directories
         4 Lack of flexibility in the routeing arrangements
         5 Deficiencies in the operation of GTS centres and circuits
         6 Loss of data or delays in relaying data on the GTS
         7 Routeing of data different from the routeing provided in the plan
         8 Various malpractices
        15 Missing value
     
    9-14 Reserved

    0'35'031 - Qualifier on monitoring results

     C 035031
         1 Sufficient and all of acceptable quality
         2 Sufficient but partly of acceptable quality
         3 Insufficient but all of acceptable quality
         4 Insufficient and of unacceptable quality
         5 Some messages not complete
         6 Suspect or wrongly coded groups could not be interpreted confidently
         7 Gross coding errors
         8 Transmission sequential order not observed
         9 Report completely garbled and thus discarded
        10 Deficiencies identified and rectified
        11 Deficiencies identified but not rectified
        12 Deficiencies not identified
        13 Measuring errors
        14 Mutual inconsistency
        15 Temporal inconsistency
        16 Forecast error
        17 Bias
        18 Improve system of quality control
        19 Expand training programmes
       123 Missing value
     
    20-98 Reserved 99-122 Not used

    0'35'032 - Cause of missing data

     C 035032
         1 Data groups missing due to radio fading
         2 Data groups missing due to outage of centre
         3 Data groups missing due to outage of circuit
         4 Non-implementation or maintenance of required RBSN density
         5 Shortage of qualified staff to man stations
         6 Lack of consumables
         7 Instrument failure
         8 Non-adherence to telecommunication procedures
         9 Some observing programmes ceased
        15 Missing value
     
    10-14 Not used

    0'35'033 - Observation and collection deficiency

     C 035033
         1 No deficiency
         2 Observations not made regularly
         3 Observations not made at right time
         4 Observations made but not disseminated
         5 Observations made and sent to incorrect users
         6 Collection not received
         7 Collection transmitted late
         8 Collection not transmitted
         9 Difficulties in HF propagation and selection of suitable frequency
        10 Difficulties in maintenance of communication equipment at remote stations
        11 No alternative arrangement for routeing meteorological observation
       123 Missing value
     
    12-99 Reserved 100-122 Not used

    0'35'034 - Statistical trends for availability of data (during the survey period(s))

     C 035034
         1 Slight improvement
         2 Significant improvement
         3 Most significant improvement
         4 Steady
         5 Decreasing
         6 Efforts required to improve night-time observations
         7 Missing value