APPL$ROOT:[DOCUMENTS.DOCUMENTATION]
                                                         GF3_MEDS_CODES.DOC

                                                  GF3 parameter code tables
                                              Author: M. Jones, IOS.BIDSTON
                                                  Last updated: 7 Jan, 1988
                            Last MEDS additions (J.R. Keeley):  8 Jul, 1996
                              Last MEDS additions (Don Spear): 8 Sept, 1998
                           Last MEDS additions (Andre Bolduc): 24 Feb, 1999
                             Last MEDS additions (Bob Keeley): 11 Oct, 2000

     Contents:
     ---------
     1.0 GF3 codes sorted alphabetically
     2.0 GF3 codes sorted alphabetically within GF3 tables
     3.0 MEDS codes sorted alphabetically
     4.0 MEDS codes sorted alphabetically within GF3 tables

     1.0 GF3 Parameter Code Table sorted alphabetically
     --------------------------------------------------
     PPPP  KMMS       Parameter Name                          Units
     
     ABSH  7XXA   ABSOLUTE HUMIDITY                          g/m**3
     ALKY  7XXD   TOTAL ALKALINITY                           mmol/m**3
     ALTG  7XXN   HEIGHT/ALTITUDE ABOVE GROUND LEVEL         metres
     ALTS  7XXN   HEIGHT/ALTITUDE ABOVE MEAN SEA LEVEL       metres
     AMON  7--D   AMMONIUM (NH4-N) CONTENT                   mmol/m**3
     APER  7XXN   AVERAGING PERIOD FOR MEASUREMENT           CODE
                   (WMO CODE TABLE 2604)
     ASTD  7XXB   AIR-SEA TEMPERATURE DIFFERENCE             degrees C
     ATCK  7XXN   ANGLE OF ATTACK (AIRCRAFT)                 degrees
     ATMP  7XXA   ATMOSPHERIC PRESSURE AT ALTITUDE           hPa
     ATMS  7XXA   ATMOSPHERIC PRESSURE AT SEA LEVEL          hPa
     ATPT  7XXA   ATMOSPHERIC PRESSURE TENDENCY              hPa/hr
     ATRK  7XXN   ALONG TRACK DISPLACEMENT                   metres
     BAND  7XXN   BANDWIDTH OF SPECTRAL ANALYSIS             hertz
     BATH  7--N   BATHYMETRIC DEPTH                          metres
     BDIR  7XXN   BANDWIDTH OF DIRECTIONAL ANALYSIS          degrees
     BEST  7XXN   BANDWIDTH OF SPECTRAL COMPONENT            hertz
     BRIT  7XXA   BRIGHTNESS (RADIATIVE) TEMPERATURE         degrees C
     CALK  7XXD   CARBONATE ALKALINITY                       mmol/m**3
     CAST  7--N   HYDROGRAPHIC CAST TYPE                     code
     CCCC  7--N   DATA CYCLE OVERFLOW INDICATOR              code
     CCVR  7XXA   TOTAL CLOUD COVER IN TENTHS OF SKY         ----
     CFLG  7--N   DATA CONTINUATION FLAG                     code
     CHAN  7XXN   NUMBER OF SENSOR CHANNELS                  ----
     CHCH  7XXA   TYPE OF HIGH ALTITUDE CLOUD                code
                  (WMO CODE 0509)
     CHLR  7--D   CHLORINITY (PARTS/THOUSAND)                g/kg
     CHLS  7--D   CHLOROSITY                                 kg/m**3
     CLCL  7XXA   TYPE OF LOW ALTITUDE CLOUD                 code
                  (WMO CODE 0513)
     CLCM  7XXA   AMOUNT OF LOW/MEDIUM ALTITUDE CLOUD        code
                  (OKTAS - WMO CODE 2700)
     CLDA  7XXA   TOTAL CLOUD AMOUNT (OKTAS-WMO CODE 2700)   code
     CLDB  7XXA   CLOUD BASE ALTITUDE                        metres
     CLDH  7XXA   CLOUD BASE HEIGHT (WMO CODE 1600)          code
     CLDT  7XXA   CLOUD TYPE (WMO CODE 0500)                 code
     CMCM  7XXA   TYPE OF MEDIUM ALTITUDE CLOUD              code
                  (WMO CODE 0515)
     CNDC  7XXD   ELECTRICAL CONDUCTIVITY                    mhos/m
     CNQF  7--N   CHEMICAL CONTENT QUALIFIER FLAG            code
     CORG  7--D   ORGANIC CARBON CONTENT                     mmol/m**3
     CPHL  7XXD   CHLOROPHYLL-A CONTENT                      mg/m**3
     CTOT  7--D   TOTAL CARBON (C) CONTENT                   mmol/m**3
     CVTQ  7--A   CO-VARIANCE OF AIR TEMPERATURE AND         degC.g/kg
                  SPECIFIC HUMIDITY
     CVWQ  7--A   CO-VARIANCE OF WIND SPEED AND SPECIFIC     (m/s).g/kg
                  HUMIDITY
     CVWS  7--A   CO-VARIANCE OF WIND SPEED COMPONENTS       (m/s)**2
     CVWT  7--A   CO-VARIANCE OF WIND SPEED AND AIR          degC.m/s
                  TEMPERATURE
     DATE  7--N   DATE WITHIN YEAR IN FORMAT MMDD            ----
     DATM  7--N   BATHYMETRIC DATUM                          code
     DAYS  7--N   DAY NUMBER WITHIN YEAR (Jan 1st = 1)       days
     DENS  7--D   SEA DENSITY                                kg/m**3
     DEPH  7--N   SENSOR DEPTH BELOW SEA SURFACE             metres
     DEWD  7XXA   DEW POINT DEPRESSION                       degrees C
     DEWT  7XXA   DEW POINT TEMPERATURE                      degrees C
     DIRM  7XXN   BEARING OF OBJECT FROM REFERENCE POINT     degrees
                  (relative to magnetic North)
     DIRT  7XXN   BEARING OF OBJECT FROM REFERENCE POINT     degrees
                  (relative to True North)
     DISE  7XXN   DISTANCE OF OBJECT IN DIRECTION TRUE       metres
                  EAST FROM REFERENCE POINT
     DISN  7XXN   DISTANCE OF OBJECT IN DIRECTION TRUE       metres
                  NORTH FROM REFERENCE POINT
     DOXY  7--D   DISSOLVED OXYGEN                           mmol/m**3
     DPSF  7XXN   DEPTH BELOW SEA FLOOR                      metres
     DRDP  7XXD   DEPTH OF DROGUE                            metres
     DRHR  7--N   DURATION (HOURS)                           hours
     DRMN  7--N   DURATION (MINUTES)                         minutes
     DRSC  7--N   DURATION (SECONDS)                         seconds
     DRYT  7XXA   DRY BULB TEMPERATURE                       degrees C
     DTDZ  7--A   VERTICAL AIR TEMPERATURE GRADIENT          degC/m
     EAZM  7XXN   AZIMUTH OF MAJOR AXIS OF NAVIGATION        degrees
                  ERROR ELLIPSE
     EEEE  7XXN   DECIMAL EXPONENT                           ----
     ELEV  7XXN   ELEVATION ANGLE OF OBJECT FROM             degrees
                  REFERENCE POINT
     EMAJ  7XXN   LENGTH OF SEMIMAJOR AXIS OF NAVIGATION     metres
                  ERROR ELLIPSE
     EMIN  7XXN   LENGTH OF SEMIMINOR AXIS OF NAVIGATION     metres
                  ERROR ELLIPSE
     ETHR  7XXN   ELAPSED TIME (HOURS)                       hours
     ETMN  7XXN   ELAPSED TIME (MINUTES)                     minutes
     ETSC  7XXN   ELAPSED TIME (SECONDS)                     seconds
     EWCM  7--D   EAST (MAGNETIC) COMPONENT OF CURRENT       m/s
     EWCT  7--D   EAST (TRUE) COMPONENT OF CURRENT           m/s
     FFFF  7--N   QUALITY CONTROL FLAG                       code
     FIXF  7--N   PRIME NAVIGATION AID FIX FLAG              code
     FREQ  7--N   FREQUENCY                                  hertz
     GBGA  7XXN   BOUGER GRAVITY ANOMALY                     milligals
     GDIR  7XXA   DIRECTION FROM WHICH GUST WIND IS          degrees
                  BLOWING (relative to True North)
     GEOT  7--N   GRAVITY EOTVOS CORRECTION                  milligals
     GFAA  7--N   FREE AIR GRAVITY ANOMALY                   milligals
     GGCD  7XXN   PERIOD OF CURRENT MEASUREMENT (DRIFT)      code
                  (WMO CODE 2265)
     GGCM  7XXN   INDICATOR FOR METHOD OF CURRENT            code
                  MEASUREMENT (WMO CODE 2266)
     GGDI  7XXN   INDICATOR FOR DIGITIZATION                 code
                  (WMO CODE 2262)
     GGEC  7XXN   DURATION AND TIME OF EULERIAN CURRENT      code
                  MEASUREMENT (WMO CODE 2264)
     GGIN  7--N   IGOSS BATHY/TESAC INDICATORS               code
     GGLC  7XXN   QUALITY OF LOCATION (WMO CODE 3311)        code
     GGMS  7--N   IGOSS MESSAGE IDENTIFIER                   code
     GGQF  7--N   QUALITY CONTROL FLAGS FOR DATE, TIME,      code
                  POSITION AND SEA FLOOR DEPTH
     GGSL  7XXN   METHOD OF SALINITY/DEPTH MEASUREMENT       code
                  (WMO CODE 2263)
     GGST  7XXN   QUALITY OF BUOY SATELLITE TRANSMISSION     code
                  (WMO CODE 3313)
     GGWI  7XXN   WIND SPEED INDICATOR (WMO CODE 1853)       code
     GRAV  7XXN   OBSERVED GRAVITY                           milligals
     GSPD  7XXA   GUST WIND SPEED                            m/s
     HCDM  7--D   DIRECTION TO WHICH HORIZONTAL CURRENT      degrees
                  IS FLOWING (relative to Magnetic North)
     HCDT  7--D   DIRECTION TO WHICH HORIZONTAL CURRENT      degrees
                  IS FLOWING (relative to True North)
     HCSP  7--D   HORIZONTAL CURRENT SPEED                   m/s
     HEAD  7XXN   PLATFORM HEADING                           degrees
                  (relative to True North)
     HGHT  7XXN   HEIGHT/ALTITUDE ABOVE SEA SURFACE          metres
     HHMM  7--N   TIME WITHIN DAY IN FORMAT HHMM             ----
     HIGF  7XXN   HIGH FREQUENCY CUT OFF FOR INTEGRATION     hertz
                  UNDER SPECTRUM
     HMXR  7XXA   HUMIDITY MIXING RATIO                      g/kg
     HOUR  7--N   HOURS WITHIN DAY                           hours
     HSUL  7--D   HYDROGEN SULPHIDE (H2S-S) CONTENT          mmol/m**3
     HTSF  7XXN   HEIGHT ABOVE SEA FLOOR                     metres
     ICEF  7--N   FLAG FOR ICE IN VICINITY OF HYDROGRAPHIC   code
                  OBSERVATIONS
     IDEN  7XXN   DATA IDENTIFIER                            ----
     LATD  7--N   LATITUDE DEGREES (North +ve)               degrees
     LATM  7--N   LATITUDE MINUTES WITHIN DEGREE             mins arc
                  (North +ve)
     LINC  7XXA   LONG-WAVE INCOMING RADIATION               W/m**2
     LOND  7--N   LONGITUDE DEGREES (East +ve)               degrees
     LONM  7--N   LONGITUDE MINUTES WITHIN DEGREE            mins arc
                  (East +ve)
     LOUT  7XXA   LONG-WAVE OUTGOING RADIATION               W/m**2
     LOWF  7XXN   LOW FREQUENCY CUT OFF FOR INTEGRATION      hertz
                  UNDER SPECTRUM
     LVLS  7--N   SELECTION OF DEPTH LEVELS                  code
     LWCT  7XXA   LIQUID WATER CONTENT                       g/m**3
     MAGC  7XXN   MAGNETIC FIELD CORRECTION                  nanoteslas
     MAGN  7XXN   MAGNETIC VARIATION FROM TRUE NORTH         degrees
     MAGR  7--N   RESIDUAL MAGNETIC FIELD                    nanoteslas
     MAGT  7XXN   TOTAL MAGNETIC FIELD                       nanoteslas
     MINS  7--N   MINUTES WITHIN HOUR                        minutes
     MMFX  7XXN   METHOD CODE FOR POSITION FIXING            code
     MMMM  7--N   METHOD CODE IN USER DEFINED AREA           code
     MNTH  7--N   CALENDAR MONTH (MM) WITHIN YEAR            ----
     NETR  7XXA   NET RADIATION                              W/m**2
     NIRR  7XXA   NEAR-INFRARED RADIATION                    W/m**2
     NORG  7--D   ORGANIC NITROGEN CONTENT                   mmol/m**3
     NSCM  7--D   NORTH (MAGNETIC) COMPONENT OF CURRENT      m/s
     NSCT  7--D   NORTH (TRUE) COMPONENT OF CURRENT          m/s
     NTHR  7--N   INTERVAL (HOURS)                           hours
     NTMN  7--N   INTERVAL (MINUTES)                         minutes
     NTOT  7--D   TOTAL NITROGEN (N) CONTENT                 mmol/m**3
     NTRA  7--D   NITRATE (NO3-N) CONTENT                    mmol/m**3
     NTRI  7--D   NITRITE (NO2-N) CONTENT                    mmol/m**3
     NTRZ  7--D   NITRATE + NITRITE CONTENT                  mmol/m**3
     NTSC  7--N   INTERVAL (SECONDS)                         seconds
     PAIR  7XXN   COUNT OF PARAMETER PAIRS IN DATA CYCLE     ----
     PHOS  7--D   PHOSPHATE (PO4-P) CONTENT                  mmol/m**3
     PHPH  7XXD   HYDROGEN ION CONCENTRATION (pH)            ----
     PLAT  7--N   PLATFORM IDENTIFIER                        code
     POTM  7--D   POTENTIAL TEMPERATURE                      degrees C
     POTT  7XXA   POTENTIAL AIR TEMPERATURE                  degrees C
     PRES  7--D   SEA PRESSURE (sea surface = 0)             decibars
     PRHB  7--N   PROBE HIT BOTTOM INDICATOR                 code
     PRRT  7XXA   PRECIPITATION RATE                         mm/hr
     PRTN  7XXA   PRECIPITATION AMOUNT                       mm
     PSAL  7--D   PRACTICAL SALINITY                         ----
     PTCH  7XXN   PITCH ANGLE                                degrees
     PVAR  7XXN   VARIANCE OF PRECEDING PARAMETER            ----
     QPOS  7--N   QUALITY CONTROL FLAG FOR GEOGRAPHIC        code
                  POSITION
     QSOL  7XXG   GROUND HEAT FLUX                           W/m**2
     QTIM  7--N   QUALITY CONTROL FLAG FOR SERIES            code
                  DATE/TIME
     RADD  7XXN   HORIZONTAL DISTANCE OF OBJECT FROM         metres
                  REFERENCE POINT
     RANG  7XXN   DIRECT DISTANCE OF OBJECT FROM             metres
                  REFERENCE POINT
     RELH  7XXA   RELATIVE HUMIDITY                          percent
     RELP  7--D   RELATIVE TOTAL PRESSURE                    decibars
     ROLL  7XXN   ROLL ANGLE                                 degrees
     SALD  7--N   SALINITY UNITS FLAG                        code
     SCDT  7--D   DIRECTION TO WHICH SEA SURFACE CURRENT     degrees
                  IS FLOWING (relative to True North)
     SCSP  7--D   SEA SURFACE CURRENT SPEED                  m/s
     SDAT  7--A   STANDARD DEVIATION OF AIR TEMPERATURE      degrees C
     SDEV  7XXN   STANDARD DEVIATION OF PRECEDING            ----
                  PARAMETER
     SDHU  7XXA   STANDARD DEVIATION OF SPECIFIC HUMIDITY    g/kg
     SDIF  7XXA   SHORT-WAVE DIFFUSE RADIATION               W/m**2
     SDIR  7XXA   SHORT-WAVE DIRECT RADIATION                W/m**2
     SDWS  7--A   STANDARD DEVIATION OF WIND SPEED           m/s
     SEAS  7XXD   SEA STATE (WMO CODE 3700)                  code
     SECC  7XXD   SECCHI DISC DEPTH                          metres
     SECS  7--N   SECONDS WITHIN MINUTE                      seconds
     SIDE  7XXN   ANGLE OF SIDESLIP (AIRCRAFT)               degrees
     SINC  7XXA   SHORT-WAVE INCOMING RADIATION              W/m**2
     SLCA  7--D   SILICATE (SIO4-SI) CONTENT                 mmol/m**3
     SLEV  7XXD   OBSERVED SEA LEVEL                         metres
     SOLT  7XXG   GROUND (SOIL) TEMPERATURE                  degrees C
     SOUT  7XXA   SHORT-WAVE OUTGOING RADIATION              W/m**2
     SPCF  7XXN   FREQUENCY OF SPECTRAL COMPONENT            hertz
     SPDG  7XXN   TRUE PLATFORM SPEED ACROSS THE GROUND      m/s
     SPDI  7XXN   INDICATED PLATFORM SPEED (AIRCRAFT)        m/s
     SPDR  7XXN   RELATIVE PLATFORM SPEED THROUGH THE        m/s
                  AIR/WATER
     SPDV  7XXN   VERTICAL PLATFORM SPEED                    m/s
     SPEH  7XXA   SPECIFIC HUMIDITY                          g/kg
     SSAL  7--D   SALINITY (PRE-1978 DEFINITION)             g/kg
                  (PARTS/THOUSAND)
     SSPS  7--D   SEA SURFACE PRACTICAL SALINITY             ----
     SSSL  7--D   SEA SURFACE SALINITY (PRE-1978             g/kg
                  DEFINITION) (PARTS/THOUSAND)
     SSTP  7--D   SEA SURFACE TEMPERATURE                    degrees C
     STAG  7XXA   STAGNATION TEMPERATURE                     degrees C
     SVCZ  7XXN   BATHYMETRY SOUND VELOCITY CORRECTION       ----
                  AREA
     SVEL  7--D   SOUND VELOCITY                             m/s
     SWDR  7--D   DIRECTION FROM WHICH SWELL IS COMING       degrees
                  (relative to True North)
     SWHT  7--D   SWELL HEIGHT                               metres
     SWPR  7--D   SWELL PERIOD                               seconds
     TDFL  7--D   TRACE DIRECTION FLAG                       code
     TDIF  7--A   AIR TEMPERATURE DIFFERENCE BETWEEN TWO     degrees C
                  LEVELS (UPPER-LOWER)
     TEMP  7--D   SEA TEMPERATURE                            degrees C
     TEXT  7XXN   PLAIN LANGUAGE TEXT                        ----
     TGRD  7--D   SEA TEMPERATURE GRADIENT                   degC/m
     TIME  7--N   TIME WITHIN DAY IN FORMAT HHMMSS           ----
     TOTP  7--D   TOTAL PRESSURE (atmosphere+sea pressure)   decibars
     TPHS  7--D   TOTAL PHOSPHOROUS (P) CONTENT              mmol/m**3
     TWCT  7XXA   TOTAL WATER CONTENT                        g/m**3
     TWTT  7XXN   BATHYMETRIC TWO WAY TRAVEL TIME            seconds
     ULTR  7XXA   ULTRA-VIOLET RADIATION                     W/m**2
     USAL  7--D   UNDEFINED SALINITY (Prac. Salin or         ----
                  parts/thousand) - see also SALD7AAN
     VAPP  7XXA   ACTUAL WATER VAPOUR PRESSURE               hPa
     VAVH  7--D   AVERAGE HEIGHT HIGHEST ONE THIRD WAVES     metres
     VBRF  7--D   WAVES SPECTRAL WIDTH (BROADNESS)           ----
     VCAR  7--D   CHARACTERISTIC WAVE HEIGHT (4*RMS)         metres
     VCMX  7--D   MAXIMUM CREST TO TROUGH WAVE HEIGHT        metres
     VCXX  7--D   AUTO-SPECTRUM OF NORTH-SOUTH TILT          deg**2/Hz
     VCXY  7--D   CO-SPECTRUM OF NORTH-SOUTH AND             deg**2/Hz
                  EAST-WEST TILTS
     VCYY  7--D   AUTO-SPECTRUM OF EAST-WEST TILT            deg**2/Hz
     VCZX  7--D   CO-SPECTRUM OF HEAVE AND NORTH-SOUTH       m.deg/Hz
                  TILT
     VCZY  7--D   CO-SPECTRUM OF HEAVE AND EAST-WEST TILT    m.deg/Hz
     VDEP  7XXN   SPECIFIED DIRECTION OF WAVE ENERGY         degrees
                  PROPAGATION
     VDIR  7--D   VISUAL ESTIMATE OF DIRECTION FROM WHICH    degrees
                  WAVES ARE COMING(relative to True North)
     VDSD  7--D   DIRECTIONAL WAVE SPECTRUM DENSITY          m**2/Hz
     VERT  7XXN   VERTICAL DISTANCE OF OBJECT ABOVE          metres
                  REFERENCE POINT
     VEST  7--D   VISUAL AVERAGE WAVE HEIGHT                 metres
     VIRT  7XXA   VIRTUAL AIR TEMPERATURE                    degrees C
     VISB  7XXA   HORIZONTAL VISIBILITY                      metres
     VMED  7--D   WAVE SPECTRUM MEAN ENERGY DIRECTION        degrees
     VMNL  7--D   MINIMUM WAVE LEVEL                         metres
     VMTA  7--D   ZEROETH MOMENT OF WAVE SPECTRUM            m**2
     VMTB  7--D   FIRST MOMENT OF WAVE SPECTRUM              m**2.Hz
     VMTC  7--D   SECOND MOMENT OF WAVE SPECTRUM             (m.Hz)**2
     VMTD  7--D   THIRD MOMENT OF WAVE SPECTRUM              m**2.Hz**3
     VMTE  7--D   FOURTH MOMENT OF WAVE SPECTRUM             m**2.Hz**4
     VMTM  7--D   FIRST NEGATIVE MOMENT OF WAVE SPECTRUM     m**2/Hz
     VMTN  7--D   SECOND NEGATIVE MOMENT OF WAVE SPECTRUM    (m/Hz)**2
     VMWD  7--D   MEAN WAVE DIRECTION FROM CROSS SPECTRA     degrees
     VMXL  7--D   MAXIMUM WAVE LEVEL                         metres
     VNUM  7--D   WAVE NUMBER FROM CROSS SPECTRA             degrees/m
     VPED  7--D   WAVE SPECTRUM PEAK ENERGY DIRECTION        degrees
     VPER  7--D   VISUAL ESTIMATE OF WAVE PERIOD             seconds
     VQXY  7--D   QUAD-SPECTRUM OF NORTH-SOUTH AND           deg**2/Hz
                  EAST-WEST TILTS
     VQZX  7--D   QUAD-SPECTRUM OF HEAVE AND NORTH-SOUTH     m.deg/Hz
                  TILT
     VQZY  7--D   QUAD-SPECTRUM OF HEAVE AND EAST-WEST       m.deg/Hz
                  TILT
     VRAT  7--A   VARIANCE OF AIR TEMPERATURE                degC**2
     VRHU  7XXA   VARIANCE OF SPECIFIC HUMIDITY              (g/kg)**2
     VRMS  7--D   RMS WAVE DISPLACEMENT                      metres
     VRWS  7--A   VARIANCE OF WIND SPEED                     (m/s)**2
     VSDN  7--D   WAVE VARIANCE SPECTRAL DENSITY : S(f)      m**2/Hz
     VSMA  7--D   SPECTRAL MOMENTS (-1,0) WAVE PERIOD        seconds
     VSMB  7--D   SPECTRAL MOMENTS (0,1) WAVE PERIOD         seconds
     VSMC  7--D   SPECTRAL MOMENTS (0,2) WAVE PERIOD         seconds
     VSMD  7--D   SPECTRAL MOMENTS (2,4) WAVE PERIOD         seconds
     VSPR  7--D   WAVE DIRECTIONAL SPREAD FROM CROSS         degrees
                  SPECTRA
     VSWD  7--D   WAVES SPECTRAL WIDTH FROM MOMENTS          ----
     VTCA  7--D   AVERAGE WAVE CREST PERIOD                  seconds
     VTDH  7--D   TUCKER DRAPER SIGNIFICANT WAVE HEIGHT      metres
     VTKC  7--D   SECOND HIGHEST WAVE CREST                  metres
     VTKD  7--D   SECOND LOWEST WAVE TROUGH                  metres
     VTPK  7--D   WAVE SPECTRUM PEAK PERIOD                  seconds
     VTZA  7--D   AVERAGE ZERO CROSSING WAVE PERIOD          seconds
     VTZM  7--D   PERIOD OF MAXIMUM ZERO CROSSING WAVE       seconds
     VWSA  7--D   INSTANTANEOUS HEAVE ACCELERATION           m/s**2
     VWSE  7--D   INSTANTANEOUS WATER SURFACE ELEVATION      metres
     VWSH  7XXA   VERTICAL WIND SHEAR                        (m/s)/km
     VWTE  7--D   WATER SURFACE EAST-WEST TILT ANGLE         degrees
     VWTN  7--D   WATER SURFACE NORTH-SOUTH TILT ANGLE       degrees
     VZMX  7--D   MAXIMUM ZERO CROSSING WAVE HEIGHT          metres
     WCLR  7XXD   WATER COLOUR (FOREL-ULE SCALE)             code
     WDIR  7XXA   DIRECTION FROM WHICH WIND IS BLOWING       degrees
                  (relative to True North)
     WETT  7XXA   WET BULB TEMPERATURE                       degrees C
     WFBS  7XXA   WIND FORCE ON BEAUFORT SCALE               code
     WMDP  7--D   MEAN WATER DEPTH                           metres
     WRDP  7--D   MEAN RECORD WATER DEPTH                    metres
     WSDP  7--D   STILL WATER DEPTH                          metres
     WSPD  7XXA   HORIZONTAL WIND SPEED                      m/s
     WSPE  7XXA   EASTWARD (TRUE) COMPONENT OF WIND SPEED    m/s
     WSPN  7XXA   NORTHWARD (TRUE) COMPONENT OF WIND SPEED   m/s
     WTHA  7XXA   PAST WEATHER (WMO CODE 4561)               code
     WVER  7XXA   VERTICAL WIND SPEED                        m/s
     WWCD  7XXA   PRESENT WEATHER (WMO CODE 4677)            code
     XTRK  7XXN   ACROSS TRACK DISPLACEMENT                  metres
                  (starboard +ve)
     YEAR  7--N   CALENDAR YEAR                              years
     ZNTH  7XXN   ZENITH ANGLE OF OBJECT FROM REFERENCE      degrees
                  POINT
     ZONE  7XXN   TIME ZONE CORRECTION                       hours




     2.0 GF3 Parameter Code Table sorted alphabetically within GF3 tables

     General purpose codes
     ---------------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     CCCC  7--N   DATA CYCLE OVERFLOW INDICATOR              code
     CFLG  7--N   DATA CONTINUATION FLAG                     code
     CHAN  7XXN   NUMBER OF SENSOR CHANNELS                  ----
     CHCH  7XXA   TYPE OF HIGH ALTITUDE CLOUD                code
                  (WMO CODE 0509)
     EEEE  7XXN   DECIMAL EXPONENT                           ----
     FFFF  7--N   QUALITY CONTROL FLAG                       code
     GGQF  7--N   QUALITY CONTROL FLAGS FOR DATE, TIME,      code
                  POSITION AND SEA FLOOR DEPTH
     IDEN  7XXN   DATA IDENTIFIER                            ----
     MMMM  7--N   METHOD CODE IN USER DEFINED AREA           code
     PAIR  7XXN   COUNT OF PARAMETER PAIRS IN DATA CYCLE     ----
     PLAT  7--N   PLATFORM IDENTIFIER                        code
     PVAR  7XXN   VARIANCE OF PRECEDING PARAMETER            ----
     QPOS  7--N   QUALITY CONTROL FLAG FOR GEOGRAPHIC        code
                  POSITION
     QTIM  7--N   QUALITY CONTROL FLAG FOR SERIES            code
                  DATE/TIME
     SDEV  7XXN   STANDARD DEVIATION OF PRECEDING            ----
                  PARAMETER
     TEXT  7XXN   PLAIN LANGUAGE TEXT                        ----
     
     Date and time within day codes
     ------------------------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     DATE  7--N   DATE WITHIN YEAR IN FORMAT MMDD            ----
     DAYS  7--N   DAY NUMBER WITHIN YEAR (Jan 1st = 1)       days
     HHMM  7--N   TIME WITHIN DAY IN FORMAT HHMM             ----
     HOUR  7--N   HOURS WITHIN DAY                           hours
     MINS  7--N   MINUTES WITHIN HOUR                        minutes
     MNTH  7--N   CALENDAR MONTH (MM) WITHIN YEAR            ----
     SECS  7--N   SECONDS WITHIN MINUTE                      seconds
     TIME  7--N   TIME WITHIN DAY IN FORMAT HHMMSS           ----
     YEAR  7--N   CALENDAR YEAR                              years
     ZONE  7XXN   TIME ZONE CORRECTION                       hours
     
     Time and frequency codes
     ------------------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     BAND  7XXN   BANDWIDTH OF SPECTRAL ANALYSIS             hertz
     BEST  7XXN   BANDWIDTH OF SPECTRAL COMPONENT            hertz
     DRHR  7--N   DURATION (HOURS)                           hours
     DRMN  7--N   DURATION (MINUTES)                         minutes
     DRSC  7--N   DURATION (SECONDS)                         seconds
     ETHR  7XXN   ELAPSED TIME (HOURS)                       hours
     ETMN  7XXN   ELAPSED TIME (MINUTES)                     minutes
     ETSC  7XXN   ELAPSED TIME (SECONDS)                     seconds
     FREQ  7--N   FREQUENCY                                  hertz
     HIGF  7XXN   HIGH FREQUENCY CUT OFF FOR INTEGRATION     hertz
                  UNDER SPECTRUM
     LOWF  7XXN   LOW FREQUENCY CUT OFF FOR INTEGRATION      hertz
                  UNDER SPECTRUM
     NTHR  7--N   INTERVAL (HOURS)                           hours
     NTMN  7--N   INTERVAL (MINUTES)                         minutes
     NTSC  7--N   INTERVAL (SECONDS)                         seconds
     SPCF  7XXN   FREQUENCY OF SPECTRAL COMPONENT            hertz
     
     Position and navigation codes
     -----------------------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     ALTG  7XXN   HEIGHT/ALTITUDE ABOVE GROUND LEVEL         metres
     ALTS  7XXN   HEIGHT/ALTITUDE ABOVE MEAN SEA LEVEL       metres
     ATCK  7XXN   ANGLE OF ATTACK (AIRCRAFT)                 degrees
     ATRK  7XXN   ALONG TRACK DISPLACEMENT                   metres
     DEPH  7--N   SENSOR DEPTH BELOW SEA SURFACE             metres
     DIRM  7XXN   BEARING OF OBJECT FROM REFERENCE POINT     degrees
                  (relative to magnetic North)
     DIRT  7XXN   BEARING OF OBJECT FROM REFERENCE POINT     degrees
                  (relative to True North)
     DISE  7XXN   DISTANCE OF OBJECT IN DIRECTION TRUE       metres
                  EAST FROM REFERENCE POINT
     DISN  7XXN   DISTANCE OF OBJECT IN DIRECTION TRUE       metres
                  NORTH FROM REFERENCE POINT
     DPSF  7XXN   DEPTH BELOW SEA FLOOR                      metres
     EAZM  7XXN   AZIMUTH OF MAJOR AXIS OF NAVIGATION        degrees
                  ERROR ELLIPSE
     ELEV  7XXN   ELEVATION ANGLE OF OBJECT FROM             degrees
                  REFERENCE POINT
     EMAJ  7XXN   LENGTH OF SEMIMAJOR AXIS OF NAVIGATION     metres
                  ERROR ELLIPSE
     EMIN  7XXN   LENGTH OF SEMIMINOR AXIS OF NAVIGATION     metres
                  ERROR ELLIPSE
     FIXF  7--N   PRIME NAVIGATION AID FIX FLAG              code
     HEAD  7XXN   PLATFORM HEADING                           degrees
                  (relative to True North)
     HGHT  7XXN   HEIGHT/ALTITUDE ABOVE SEA SURFACE          metres
     HTSF  7XXN   HEIGHT ABOVE SEA FLOOR                     metres
     LATD  7--N   LATITUDE DEGREES (North +ve)               degrees
     LATM  7--N   LATITUDE MINUTES WITHIN DEGREE             mins arc
                  (North +ve)
     LOND  7--N   LONGITUDE DEGREES (East +ve)               degrees
     LONM  7--N   LONGITUDE MINUTES WITHIN DEGREE            mins arc
                  (East +ve)
     MAGN  7XXN   MAGNETIC VARIATION FROM TRUE NORTH         degrees
     MMFX  7XXN   METHOD CODE FOR POSITION FIXING            code
     PTCH  7XXN   PITCH ANGLE                                degrees
     RADD  7XXN   HORIZONTAL DISTANCE OF OBJECT FROM         metres
                  REFERENCE POINT
     RANG  7XXN   DIRECT DISTANCE OF OBJECT FROM             metres
                  REFERENCE POINT
     ROLL  7XXN   ROLL ANGLE                                 degrees
     SIDE  7XXN   ANGLE OF SIDESLIP (AIRCRAFT)               degrees
     SPDG  7XXN   TRUE PLATFORM SPEED ACROSS THE GROUND      m/s
     SPDI  7XXN   INDICATED PLATFORM SPEED (AIRCRAFT)        m/s
     SPDR  7XXN   RELATIVE PLATFORM SPEED THROUGH THE        m/s
                  AIR/WATER
     SPDV  7XXN   VERTICAL PLATFORM SPEED                    m/s
     VERT  7XXN   VERTICAL DISTANCE OF OBJECT ABOVE          metres
                  REFERENCE POINT
     XTRK  7XXN   ACROSS TRACK DISPLACEMENT                  metres
                  (starboard +ve)
     ZNTH  7XXN   ZENITH ANGLE OF OBJECT FROM REFERENCE      degrees
                  POINT
 
     Physical oceanography codes
     ---------------------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     CAST  7--N   HYDROGRAPHIC CAST TYPE                     code
     CHLR  7--D   CHLORINITY (PARTS/THOUSAND)                g/kg
     CHLS  7--D   CHLOROSITY                                 kg/m**3
     CNDC  7XXD   ELECTRICAL CONDUCTIVITY                    mhos/m
     DENS  7--D   SEA DENSITY                                kg/m**3
     DOXY  7--D   DISSOLVED OXYGEN                           mmol/m**3
     DRDP  7XXD   DEPTH OF DROGUE                            metres
     EWCM  7--D   EAST (MAGNETIC) COMPONENT OF CURRENT       m/s
     EWCT  7--D   EAST (TRUE) COMPONENT OF CURRENT           m/s
     HCDM  7--D   DIRECTION TO WHICH HORIZONTAL CURRENT      degrees
                  IS FLOWING (relative to Magnetic North)
     HCDT  7--D   DIRECTION TO WHICH HORIZONTAL CURRENT      degrees
                  IS FLOWING (relative to True North)
     HCSP  7--D   HORIZONTAL CURRENT SPEED                   m/s
     ICEF  7--N   FLAG FOR ICE IN VICINITY OF HYDROGRAPHIC   code
                  OBSERVATIONS
     LVLS  7--N   SELECTION OF DEPTH LEVELS                  code
     NSCM  7--D   NORTH (MAGNETIC) COMPONENT OF CURRENT      m/s
     NSCT  7--D   NORTH (TRUE) COMPONENT OF CURRENT          m/s
     POTM  7--D   POTENTIAL TEMPERATURE                      degrees C
     PRES  7--D   SEA PRESSURE (sea surface = 0)             decibars
     PRHB  7--N   PROBE HIT BOTTOM INDICATOR                 code
     PSAL  7--D   PRACTICAL SALINITY                         ----
     RELP  7--D   RELATIVE TOTAL PRESSURE                    decibars
     SALD  7--N   SALINITY UNITS FLAG                        code
     SCDT  7--D   DIRECTION TO WHICH SEA SURFACE CURRENT     degrees
                  IS FLOWING (relative to True North)
     SCSP  7--D   SEA SURFACE CURRENT SPEED                  m/s
     SECC  7XXD   SECCHI DISC DEPTH                          metres
     SLEV  7XXD   OBSERVED SEA LEVEL                         metres
     SSAL  7--D   SALINITY (PRE-1978 DEFINITION)             g/kg
                  (PARTS/THOUSAND)
     SSPS  7--D   SEA SURFACE PRACTICAL SALINITY             ----
     SSSL  7--D   SEA SURFACE SALINITY (PRE-1978             g/kg
                  DEFINITION) (PARTS/THOUSAND)
     SSTP  7--D   SEA SURFACE TEMPERATURE                    degrees C
     SVEL  7--D   SOUND VELOCITY                             m/s
     TDFL  7--D   TRACE DIRECTION FLAG                       code
     TEMP  7--D   SEA TEMPERATURE                            degrees C
     TGRD  7--D   SEA TEMPERATURE GRADIENT                   degC/m
     TOTP  7--D   TOTAL PRESSURE (atmosphere+sea pressure)   decibars
     USAL  7--D   UNDEFINED SALINITY (Prac. Salin or         ----
                  parts/thousand) - see also SALD7AAN
     WCLR  7XXD   WATER COLOUR (FOREL-ULE SCALE)             code

     Wave codes
     ----------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     BDIR  7XXN   BANDWIDTH OF DIRECTIONAL ANALYSIS          degrees
     SEAS  7XXD   SEA STATE (WMO CODE 3700)                  code
     SWDR  7--D   DIRECTION FROM WHICH SWELL IS COMING       degrees
                  (relative to True North)
     SWHT  7--D   SWELL HEIGHT                               metres
     SWPR  7--D   SWELL PERIOD                               seconds
     VAVH  7--D   AVERAGE HEIGHT HIGHEST ONE THIRD WAVES     metres
     VBRF  7--D   WAVES SPECTRAL WIDTH (BROADNESS)           ----
     VCAR  7--D   CHARACTERISTIC WAVE HEIGHT (4*RMS)         metres
     VCMX  7--D   MAXIMUM CREST TO TROUGH WAVE HEIGHT        metres
     VCXX  7--D   AUTO-SPECTRUM OF NORTH-SOUTH TILT          deg**2/Hz
     VCXY  7--D   CO-SPECTRUM OF NORTH-SOUTH AND             deg**2/Hz
                  EAST-WEST TILTS
     VCYY  7--D   AUTO-SPECTRUM OF EAST-WEST TILT            deg**2/Hz
     VCZX  7--D   CO-SPECTRUM OF HEAVE AND NORTH-SOUTH       m.deg/Hz
                  TILT
     VCZY  7--D   CO-SPECTRUM OF HEAVE AND EAST-WEST TILT    m.deg/Hz
     VDEP  7XXN   SPECIFIED DIRECTION OF WAVE ENERGY         degrees
                  PROPAGATION
     VDIR  7--D   VISUAL ESTIMATE OF DIRECTION FROM WHICH    degrees
                  WAVES ARE COMING(relative to True North)
     VDSD  7--D   DIRECTIONAL WAVE SPECTRUM DENSITY          m**2/Hz
     VEST  7--D   VISUAL AVERAGE WAVE HEIGHT                 metres
     VMED  7--D   WAVE SPECTRUM MEAN ENERGY DIRECTION        degrees
     VMNL  7--D   MINIMUM WAVE LEVEL                         metres
     VMTA  7--D   ZEROETH MOMENT OF WAVE SPECTRUM            m**2
     VMTB  7--D   FIRST MOMENT OF WAVE SPECTRUM              m**2.Hz
     VMTC  7--D   SECOND MOMENT OF WAVE SPECTRUM             (m.Hz)**2
     VMTD  7--D   THIRD MOMENT OF WAVE SPECTRUM              m**2.Hz**3
     VMTE  7--D   FOURTH MOMENT OF WAVE SPECTRUM             m**2.Hz**4
     VMTM  7--D   FIRST NEGATIVE MOMENT OF WAVE SPECTRUM     m**2/Hz
     VMTN  7--D   SECOND NEGATIVE MOMENT OF WAVE SPECTRUM    (m/Hz)**2
     VMWD  7--D   MEAN WAVE DIRECTION FROM CROSS SPECTRA     degrees
     VMXL  7--D   MAXIMUM WAVE LEVEL                         metres
     VNUM  7--D   WAVE NUMBER FROM CROSS SPECTRA             degrees/m
     VPED  7--D   WAVE SPECTRUM PEAK ENERGY DIRECTION        degrees
     VPER  7--D   VISUAL ESTIMATE OF WAVE PERIOD             seconds
     VQXY  7--D   QUAD-SPECTRUM OF NORTH-SOUTH AND           deg**2/Hz
                  EAST-WEST TILTS
     VQZX  7--D   QUAD-SPECTRUM OF HEAVE AND NORTH-SOUTH     m.deg/Hz
                  TILT
     VQZY  7--D   QUAD-SPECTRUM OF HEAVE AND EAST-WEST       m.deg/Hz
                  TILT
     VRMS  7--D   RMS WAVE DISPLACEMENT                      metres
     VSDN  7--D   WAVE VARIANCE SPECTRAL DENSITY : S(f)      m**2/Hz
     VSMA  7--D   SPECTRAL MOMENTS (-1,0) WAVE PERIOD        seconds
     VSMB  7--D   SPECTRAL MOMENTS (0,1) WAVE PERIOD         seconds
     VSMC  7--D   SPECTRAL MOMENTS (0,2) WAVE PERIOD         seconds
     VSMD  7--D   SPECTRAL MOMENTS (2,4) WAVE PERIOD         seconds
     VSPR  7--D   WAVE DIRECTIONAL SPREAD FROM CROSS         degrees
                  SPECTRA
     VSWD  7--D   WAVES SPECTRAL WIDTH FROM MOMENTS          ----
     VTCA  7--D   AVERAGE WAVE CREST PERIOD                  seconds
     VTDH  7--D   TUCKER DRAPER SIGNIFICANT WAVE HEIGHT      metres
     VTKC  7--D   SECOND HIGHEST WAVE CREST                  metres
     VTKD  7--D   SECOND LOWEST WAVE TROUGH                  metres
     VTPK  7--D   WAVE SPECTRUM PEAK PERIOD                  seconds
     VTZA  7--D   AVERAGE ZERO CROSSING WAVE PERIOD          seconds
     VTZM  7--D   PERIOD OF MAXIMUM ZERO CROSSING WAVE       seconds
     VWSA  7--D   INSTANTANEOUS HEAVE ACCELERATION           m/s**2
     VWSE  7--D   INSTANTANEOUS WATER SURFACE ELEVATION      metres
     VWTE  7--D   WATER SURFACE EAST-WEST TILT ANGLE         degrees
     VWTN  7--D   WATER SURFACE NORTH-SOUTH TILT ANGLE       degrees
     VZMX  7--D   MAXIMUM ZERO CROSSING WAVE HEIGHT          metres
     WMDP  7--D   MEAN WATER DEPTH                           metres
     WRDP  7--D   MEAN RECORD WATER DEPTH                    metres
     WSDP  7--D   STILL WATER DEPTH                          metres

     Meteorology codes
     -----------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------    ---------
     ABSH  7XXA   ABSOLUTE HUMIDITY                          g/m**3
     ASTD  7XXB   AIR-SEA TEMPERATURE DIFFERENCE             degrees C
     ATMP  7XXA   ATMOSPHERIC PRESSURE AT ALTITUDE           hPa
     ATMS  7XXA   ATMOSPHERIC PRESSURE AT SEA LEVEL          hPa
     ATPT  7XXA   ATMOSPHERIC PRESSURE TENDENCY              hPa/hr
     BRIT  7XXA   BRIGHTNESS (RADIATIVE) TEMPERATURE         degrees C
     CCVR  7XXA   TOTAL CLOUD COVER IN TENTHS OF SKY         ----
     
     CLCL  7XXA   TYPE OF LOW ALTITUDE CLOUD                 code
                  (WMO CODE 0513)
     CLCM  7XXA   AMOUNT OF LOW/MEDIUM ALTITUDE CLOUD        code
                  (OKTAS - WMO CODE 2700)
     CLDA  7XXA   TOTAL CLOUD AMOUNT (OKTAS-WMO CODE 2700)   code
     CLDB  7XXA   CLOUD BASE ALTITUDE                        metres
     CLDH  7XXA   CLOUD BASE HEIGHT (WMO CODE 1600)          code
     CLDT  7XXA   CLOUD TYPE (WMO CODE 0500)                 code
     CMCM  7XXA   TYPE OF MEDIUM ALTITUDE CLOUD              code
                  (WMO CODE 0515)
     CVTQ  7--A   CO-VARIANCE OF AIR TEMPERATURE AND         degC.g/kg
                  SPECIFIC HUMIDITY
     CVWQ  7--A   CO-VARIANCE OF WIND SPEED AND SPECIFIC     (m/s).g/kg
                  HUMIDITY
     CVWS  7--A   CO-VARIANCE OF WIND SPEED COMPONENTS       (m/s)**2
     CVWT  7--A   CO-VARIANCE OF WIND SPEED AND AIR          degC.m/s
                  TEMPERATURE
     DEWD  7XXA   DEW POINT DEPRESSION                       degrees C
     DEWT  7XXA   DEW POINT TEMPERATURE                      degrees C
     DRYT  7XXA   DRY BULB TEMPERATURE                       degrees C
     DTDZ  7--A   VERTICAL AIR TEMPERATURE GRADIENT          degC/m
     GDIR  7XXA   DIRECTION FROM WHICH GUST WIND IS          degrees
                  BLOWING (relative to True North)
     GSPD  7XXA   GUST WIND SPEED                            m/s
     HMXR  7XXA   HUMIDITY MIXING RATIO                      g/kg
     LINC  7XXA   LONG-WAVE INCOMING RADIATION               W/m**2
     LOUT  7XXA   LONG-WAVE OUTGOING RADIATION               W/m**2
     LWCT  7XXA   LIQUID WATER CONTENT                       g/m**3
     NETR  7XXA   NET RADIATION                              W/m**2
     NIRR  7XXA   NEAR-INFRARED RADIATION                    W/m**2
     POTT  7XXA   POTENTIAL AIR TEMPERATURE                  degrees C
     PRRT  7XXA   PRECIPITATION RATE                         mm/hr
     PRTN  7XXA   PRECIPITATION AMOUNT                       mm
     QSOL  7XXG   GROUND HEAT FLUX                           W/m**2
     RELH  7XXA   RELATIVE HUMIDITY                          percent
     SDAT  7--A   STANDARD DEVIATION OF AIR TEMPERATURE      degrees C
     SDHU  7XXA   STANDARD DEVIATION OF SPECIFIC HUMIDITY    g/kg
     SDIF  7XXA   SHORT-WAVE DIFFUSE RADIATION               W/m**2
     SDIR  7XXA   SHORT-WAVE DIRECT RADIATION                W/m**2
     SDWS  7--A   STANDARD DEVIATION OF WIND SPEED           m/s
     SINC  7XXA   SHORT-WAVE INCOMING RADIATION              W/m**2
     SOLT  7XXG   GROUND (SOIL) TEMPERATURE                  degrees C
     SOUT  7XXA   SHORT-WAVE OUTGOING RADIATION              W/m**2
     SPEH  7XXA   SPECIFIC HUMIDITY                          g/kg
     STAG  7XXA   STAGNATION TEMPERATURE                     degrees C
     TDIF  7--A   AIR TEMPERATURE DIFFERENCE BETWEEN TWO     degrees C
                  LEVELS (UPPER-LOWER)
     TWCT  7XXA   TOTAL WATER CONTENT                        g/m**3
     ULTR  7XXA   ULTRA-VIOLET RADIATION                     W/m**2
     VAPP  7XXA   ACTUAL WATER VAPOUR PRESSURE               hPa
     VIRT  7XXA   VIRTUAL AIR TEMPERATURE                    degrees C
     VISB  7XXA   HORIZONTAL VISIBILITY                      metres
     VRAT  7--A   VARIANCE OF AIR TEMPERATURE                degC**2
     VRHU  7XXA   VARIANCE OF SPECIFIC HUMIDITY              (g/kg)**2
     VRWS  7--A   VARIANCE OF WIND SPEED                     (m/s)**2
     VWSH  7XXA   VERTICAL WIND SHEAR                        (m/s)/km
     WDIR  7XXA   DIRECTION FROM WHICH WIND IS BLOWING       degrees
                  (relative to True North)
     WETT  7XXA   WET BULB TEMPERATURE                       degrees C
     WFBS  7XXA   WIND FORCE ON BEAUFORT SCALE               code
     WSPD  7XXA   HORIZONTAL WIND SPEED                      m/s
     WSPE  7XXA   EASTWARD (TRUE) COMPONENT OF WIND SPEED    m/s
     WSPN  7XXA   NORTHWARD (TRUE) COMPONENT OF WIND SPEED   m/s
     WTHA  7XXA   PAST WEATHER (WMO CODE 4561)               code
     WVER  7XXA   VERTICAL WIND SPEED                        m/s
     WWCD  7XXA   PRESENT WEATHER (WMO CODE 4677)            code

     Geophysics codes
     ----------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     BATH  7--N   BATHYMETRIC DEPTH                          metres
     DATM  7--N   BATHYMETRIC DATUM                          code
     GBGA  7XXN   BOUGER GRAVITY ANOMALY                     milligals
     GEOT  7--N   GRAVITY EOTVOS CORRECTION                  milligals
     GFAA  7--N   FREE AIR GRAVITY ANOMALY                   milligals
     GRAV  7XXN   OBSERVED GRAVITY                           milligals
     MAGC  7XXN   MAGNETIC FIELD CORRECTION                  nanoteslas
     MAGR  7--N   RESIDUAL MAGNETIC FIELD                    nanoteslas
     MAGT  7XXN   TOTAL MAGNETIC FIELD                       nanoteslas
     SVCZ  7XXN   BATHYMETRY SOUND VELOCITY CORRECTION       ----
                  AREA
     TWTT  7XXN   BATHYMETRIC TWO WAY TRAVEL TIME            seconds
     
     Chemistry codes
     ---------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     ALKY  7XXD   TOTAL ALKALINITY                           mmol/m**3
     AMON  7--D   AMMONIUM (NH4-N) CONTENT                   mmol/m**3
     CALK  7XXD   CARBONATE ALKALINITY                       mmol/m**3
     CNQF  7--N   CHEMICAL CONTENT QUALIFIER FLAG            code
     CORG  7--D   ORGANIC CARBON CONTENT                     mmol/m**3
     CPHL  7XXD   CHLOROPHYLL-A CONTENT                      mg/m**3
     CTOT  7--D   TOTAL CARBON (C) CONTENT                   mmol/m**3
     HSUL  7--D   HYDROGEN SULPHIDE (H2S-S) CONTENT          mmol/m**3
     NORG  7--D   ORGANIC NITROGEN CONTENT                   mmol/m**3
     NTOT  7--D   TOTAL NITROGEN (N) CONTENT                 mmol/m**3
     NTRA  7--D   NITRATE (NO3-N) CONTENT                    mmol/m**3
     NTRI  7--D   NITRITE (NO2-N) CONTENT                    mmol/m**3
     NTRZ  7--D   NITRATE + NITRITE CONTENT                  mmol/m**3
     PHOS  7--D   PHOSPHATE (PO4-P) CONTENT                  mmol/m**3
     PHPH  7XXD   HYDROGEN ION CONCENTRATION (pH)            ----
     SLCA  7--D   SILICATE (SIO4-SI) CONTENT                 mmol/m**3
     TPHS  7--D   TOTAL PHOSPHOROUS (P) CONTENT              mmol/m**3

     Special IGOSS Indicator codes
     -----------------------------
     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------   --------
     APER  7XXN   AVERAGING PERIOD FOR MEASUREMENT           CODE
                   (WMO CODE TABLE 2604)
     GGCD  7XXN   PERIOD OF CURRENT MEASUREMENT (DRIFT)      code
                  (WMO CODE 2265)
     GGCM  7XXN   INDICATOR FOR METHOD OF CURRENT            code
                  MEASUREMENT (WMO CODE 2266)
     GGDI  7XXN   INDICATOR FOR DIGITIZATION                 code
                  (WMO CODE 2262)
     GGEC  7XXN   DURATION AND TIME OF EULERIAN CURRENT      code
                  MEASUREMENT (WMO CODE 2264)
     GGIN  7--N   IGOSS BATHY/TESAC INDICATORS               code
     GGLC  7XXN   QUALITY OF LOCATION (WMO CODE 3311)        code
     GGMS  7--N   IGOSS MESSAGE IDENTIFIER                   code
     GGSL  7XXN   METHOD OF SALINITY/DEPTH MEASUREMENT       code
                  (WMO CODE 2263)
     GGST  7XXN   QUALITY OF BUOY SATELLITE TRANSMISSION     code
                  (WMO CODE 3313)
     GGWI  7XXN   WIND SPEED INDICATOR (WMO CODE 1853)       code



     3.0 MEDS non-standard codes.
      Note that codes generated by NODC are 3 alphanumerics followed by a
     # symbol.

     SVA$ = specific volume anomaly in units of ???
     SGT$ = sigma-t in units ?? (unitsof density)
     SDA$ = sea density anomaly in units ???

     PPPP  KMMS       Parameter Name                          Units
     ----  ----   ---------------------------------------    --------
     ACC$         MEDS accesion number                       ----
     ADID         AODC database ID                           ----
     ADNB         Number of blocks averaged in the           ----
                  spectrum. (Note that this is the same as 
                  NBL1) 
     ADNS         Number of samples per fourier block        ----
     ADST         Automatic gain control                     ----
     ADSV         Automatic gain control variance            ----
     AED1         AES wave direction (from METOC hindcast).  degrees
                  This is probably the wind direction. 
     APC1         Averaging period (in TRACKOB: mC) for      minutes
                  surface current
     APR$         The group in TRACKOB supplying the         ----
                  averging periods used for temperature,
                  salinity, currents and the units of the
                  current. (See APER)
     APS1         Averaging period (in TRACKOB: mS) for      minutes
                  salinity
     APT1         Averaging period (in TRACKOB: mT) for      minutes
                  sea surface temperature
     AREA         Area code used by NODC                     code
                   PA = Pacific
                   IN = Indian
                   AT = Atlantic
     ARG$         ARGOS number given to a platform           ----
     AST1         Internal temperature from the              deg.C
                  non-synoptic part of WRIPS buoy data. 
     AST2         Internal temperature from the synoptic     deg.C
                  part of WRIPS buoy data. 
     BCI$         The indicator k5 used in the BATHY code    code
                  to tell the method of current 
                  measurement. This is equivalent to CCGM
     BKT$         Bucket sample                              ----
     BQA$         QA in BUOY code form                       ----
     BTC1         BT temperature correction                  deg.C
     BTN1         BT slide number                            ----
     BTR1         BT surface reference temperature           deg.C
     BTS1         BT surface temperature                     deg.C
     BYM$         Previous bulletin year-month as YYMM       ----
     B12$         Vitamin B12                                milli-microg/lt
     CCLL         Platform call sign                         ----
     CDX1         Dissolved organic C = CORG DX (mg/lt)      ?????
     CLW1         The divider network setting on the FM to   ----
                  digital conversion system
     CLW2         The ratio of playback to record speed for  ----
                  the digitizer
     CLW3         The clock frequency                        Hz
     CLW4         The percent modulation of the waverider    Percent
                  FM signal
     CLW5         The mean center frequency of the           Hz
                  waverider FM signal
     CLW6         The zero intercept on the frequency axis   Hz
                  for frequency vs height
     CLW7         The slope of the frequency/height          m/Hz
                  calibration
     CLW8         The height of the pressure cell above the  m
                  bottom
     CPH$         Chlorophyll-a content, determined by the   mg/m**3
                  Welchmeyer method
     CPX1         Particulate C = CORG PX (mg/lt)            ?????
     CSC1         Chief scientist's name                     ----
     CSID         CSIRO database ID                          ----
     CSN$         IGOSS call sign                            ----
     CTF$         The indicator that encodes which quality   code
                  control tests for chemical data that 
                  were failed.
     CTP$         The indicator that encodes which quality   code
                  control tests on chemical data have been
                  executed. 
     DAT#         NODC originator's date                     ----
     DCLN         The magnetic declination                   degrees
     DDB$         The date as YYYYMMDD of deployment         ----
     DEB$         The date as YYYYMMDD of the last message   ----
                  received.
     DEC$         The code for why messages ceased.          code
     DEOW         Code to indicate if the magnetic           code
                   declination is east or west:
                   1 = East, 2 = West
     DET$         The time as HHMM of the last message       ----
                  received.
     DHM$         Day, hour, and minute as DDHHMM and a      ----
                  real number.
     DKT$         Recorder type for IGOSS BTs. This is       ----
                  equivalent to RCT$.
     DLA$         Latitude (north +ve) at deployment         degrees
                  (see DLT$)
     DLO$         Longitude (+/- 180 west +ve) at            degrees
                  deployment
     DLT$         Latitude (north +ve) at deployment         degrees
     DMH$         The day of the month, as DD, of the        day
                  extreme high value.
     DML$         The day of the month, as DD, of the        day
                  extreme low value.
     DMN$         The daily mean value.                      m
     DN3$         The date as YYYYMMDD of analysis of 
                   Nitrate
     DPO$         The date as YYYYMMDD of analysis of 
                   Phosphate
     DPT$         The deployment time (GMT) as HHMM          ----
     DRD$         The date as YYYYMMDD that the drogue       ----
                  was lost
     DRT$         The drogue type code                       code
     DSO$         The date as YYYYMMDD of analysis of 
                   Silicate
     DSP1         The Juszko directional spread factor for   ----
                  the most energetic peak in a spectrum.
     DSP2         The Juszko directional spread factor for   ----
                  the second most energetic peak in a 
                  spectrum
     DTC$         Calibration date as YYYYMMDD               ----
     DTE$         The day, month and year as indicated in    ----
                  IGOSS messages. So DDMMY where DD is the 
                  day, MM is the month and Y is the last 
                  digit of the year.
     DTH$         The day, hour and minute of the extreme    ----
                  high
     DTL$         The day, hour and minute of the extreme    ----
                  low
     DT2$         The date as YYYYMMDD of the end of a tow.  ----
                  When this is used, the date field 
                  records the start date.
     EAG1         Name of the exchange agency                ----
     EIT$         Engine intake water sample                 ----
     ELA$         The error in latitude                      degrees
     ELO$         The error in longitude                     degrees
     ERS$         Percent residual least squares error by    ----
                  Juszko in 10 parameter model fit to
                  directional spectrum.
     EST$         The error in SST                           deg.C
     EXP$         The originator's experiment number         ----
     FLO1         Fluoride                                   ????
     FLU$         Fluorescence                               %
     FLU1         Fluorescence                               mg/m**3
     FLU2         Fluorescence                               volts
     FRE$         Code for fall rate equation used. See      code
                  IGOSS code table.
     FRQ1         Frequency of the most energetic peak       hertz
                  in spectrum
     FRQ2         Frequency of the second most energetic     hertz
                  peak in spectrum
     F11$         CFC11 measurements                         pmol/kg
     F12$         CFC12 measurements                         pmol/kg
     GE1$         Contents of the first engineering group    code
                  in a DRIBU message                    
     GE2$         Contents of the second engineering group   code
                  in a DRIBU message                    
     GE3$         Contents of the third engineering group    code
                  in a DRIBU message                    
     GGC$         The 5 character 66... group used in a      code
                  TESAC message to indicate information 
                  about the subsurface data collection. 
     GGI$         The 5 character 88.. group used in a       code
                  BATHY and a TESAC message to indicate 
                  information about the subsurface profile.
     GGK6         Method of removing ship velocity code      code
                  (k6 of a TESAC message)
     GG1$         The contents of the group 111QdQx in       ----
                  FM18-X BUOY code form
     GG2$         The contents of the group 222QdQx in       ----
                  FM18-X BUOY code form
     GG3$         The contents of the group 333QdQx in       ----
                  FM18-X BUOY code form
     GIN$         Contents of the group 1QpQ2QtwQ4 in the    code
                  DRIBU message
     GNC#         NODC cruise code                           code
     GPA$         Geopotential anomaly                       dyn.m
     GPT$         Pressure tendency code (see WMO code       code
                  table 0200)
     HGR$         Hourly height water level derived from     m
                  MEDS Gradicon to cm precision            
     HIN$         The integrated water level for an hour.    m
     HIS$         Hourly height water level derived from     m
                  unknown historical sources to cm 
                  precision 
     HL1$         The height of the first daily low          m
     HL2$         The height of the second daily low         m
     HMN$         The minimum height read in an hour.        m
     HMT$         Hull mounted sensor                        ----
     HMX$         The maximum height read in an hour.        m
     HM2$         The time as HHMM of the the end of a tow.  ----
                  When this is used, the time field 
                  records the start time.
     HOG$         Hourly height water level derived from     m
                  Ogdensberg to centimeter precision
     HOH$         Hourly height water level derived from     m
                  Ontario Hydro to centimeter precision 
     HPR$         Hourly height predicted value.             m
     HSC$         Hourly height water level derived from     m
                  MEDS Scalar to cm precision 
     HTH$         Hourly heights supplied from the West      m
                  Coast.
     HTL$         Height of the XBT launcher above the       m
                  water
     HW1$         The height of the first daily high         m
     HW2$         The height of the second daily high        m
     HZY$         Hourly height water level derived from     m
                  MEDS Zycor to cm precision
     H00$         Hourly heights supplied by MEDS from       m
                  TATS gauges.
     H15$         Height value read 15 minutes after the     m
                  hour.
     H30$         Height value read 30 minutes after the     m
                  hour.
     H45$         Height value read 45 minutes after the     m
                  hour.
     H60$         Hourly height water level derived from     m
                  TATS stations and reduced by rounding 
                  to a precision of cm
     ICD$         Equivalent to IST$                         ----
     ICT$         Ice thickness                              m
     INS1         Institute                                  ----
     INTP         Instrument type (used with wavec data)     code
                   1 = Waverider
                   2 = WAVEC
                   3 = ENDECO
                   4 = Satellite waverider
     IST$         Instrument name                            ----
                   MOD CM = modified current meter to collect
                    T and S only.
     JPT$         JGOFS Protocol Code Table                  ----
     LAT$         The latitude in IGOSS format of DDMM       ----
                  where DD is the degrees and MM the 
                  minutes of latitude.
     LAT#         NODC originators latitude                  degrees
     LBL1         The block length                           sec
     LNG$         Longitude from GPS (+ West)                degrees
     LN2$         The second longitude (from DRIBU           degrees
                  message or for ocean profile data the
                  longitude records the start longitude and
                  this records the end longitude of a tow)
     LON$         The longitude in IGOSS format of DDMM      ----
                   where DD is the degrees and MM the 
                  minutes of longitude.
     LON#         NODC originators longitude                 degrees
     LTG$         Latitude from GPS (+ North)                degrees
     LT2$         The second latitude (from DRIBU            degrees
                  message or for ocean profile data the
                  latitude records the start latitude and
                  this records the end latitude of a tow)
     LW1$         The height of the first daily low          m
     LW2$         The height of the second daily low         m
     MMN$         Monthly mean waterlevel                    m
     MNS$         Minimum value of salinity                  PSU
     MNT$         Minimum value of temperature               degC
     MRT#         NODC instrument for referrence temperature ----
                  MBT reference type
     MTH$         Links a observed value PCODE to a method   ----
                  or insturmentation PCODE
     MXS$         Maximum value of salinity                  PSU
     MXT$         Maximum value of temperature               degC
     NBD1         The number of bad samples in a surface     ----
                  elevation time series. 
     NBL1         The number of blocks averaged to derive    ----
                  a wave spectrum.
     NET$         Net mesh size                              microns
     NH3$         NH3-N in micrograms/liter                  ?????
     NID#         NODC internal database identifier          code
     NPT#         NODC P3 format flag indicating that a      code
                  station has either only derived values or
                  at least one profile of measured values
     NUL$         A null parameter. It is used when it is    ----
                  necessary to reserve the position of
                  code.
     NUM$         Number of values used in computation       ----
     NWAV         The number of waves in the record          ----
     OCL#         NODC OCL reference number                  ----
     OCR$         The originator's cruise number             ----
     ODD1         The direction from which waves are         degrees
                  coming for the most energetic peak in
                  a spectrum
     ODD2         The direction from which waves are         degrees
                  coming for the second most energetic 
                  peak in a spectrum
     OID$         Originator's station identifier            ----
     OLS#         NODC OCL unique station number             ----
     OLP$         Particulate oil                            mg/m2
     OLW$         Total dissolved/dispersed oil              mg/m3
     ONM1         Originator's name                          ----
     OSI$         Originator's sample identifier             ----
     OXS$         Percent Oxygen saturation                  percent
     O18$         O18/O16 ratio                              percent
     PAR$         Photosynthetic active radiation            uE/m**2-s
     PAR1         Photosynthetic active radiation            unknown
     PDT$         The date as DDMMY of the last position     ----
                  (from the DRIBU message)
     PEA$         Potential energy anomaly                   Kg-m/sec**2
     PEQ$         Probe type and fall rate equation code     ----
                  table (IGOSS)
     PFR$         WMO codes 1770 (IxIxIx) + 4770 (XrXr)      code
                   as used in the JJYY BATHY code
     PGI#         NODC P3 software identifier                code
     PHA$         Phaeophytin                                mg/m***3
     PHI$         Inorganic phosphate                        mmol/m**3
     PH1$         Replicate sample of inorganic phosphate    mmol/m**3
     PLA#         NODC platform/ship code                    code
     PLT$         Percent light transmittance                percent
     PNM1         Platform name                              ----
     PON$         Particulate Organic Nitrogen               mg/**3
     PRO1         Project name                               ----
     PRO#         NODC project code                          code
     PRP$         Primary productivity                       mgC/m**3/hr
     PRQ$         Primary productivity                       mgC/m**3/day
     PRV$         Velocity probe                             m/s
     PRT$         Probe type code (see IGOSS code table)     ----
                  NODC uses PRT#
     PTM$         The time as HHMM/ of the last position     ----
                  (from the DRIBU message)
     PTP1         Platform type                              code
     QCF$         The indicator that encodes which MEDS      code
                  quality control tests have failed for 
                  temperature and salinity data. 
     QCP$         The indicator that encodes which MEDS      code
                  quality control tests have been 
                  executed for temperature and salinity 
                  data.
     QFF$         The indicator that encodes which ORSTOM    code
                  quality control tests have failed for 
                  temperature and salinity data. 
     QFP$         The indicator that encodes which ORSTOM    code
                  quality control tests have been 
                  executed for temperature and salinity 
                  data.
     QNF#         NODC indicator of QC tests failed at the   code
                  station level
     QNP#         NODC indicator of QC tests made at the     code
                  station level
     RCRD         Indicates a record has been created.       code
     RCT$         XBT recorder type (see IGOSS code table)   code
                  This is equivalent to DKT$.
     REC$         A record in the MEDS time series format.   ----
     RECD         The record number of the tape containing   ----
                  the raw data. 
     REP$         Records that one or more profiles have     code
                  replicate samples at one or more depths. 
                  The profiles affected are encoded in the
                  same way QCF$, QCP$ are set
     RTC$         Reference temperature code                 code
     RTD$         Reference temperature water depth          m
     RTM$         Reference temperature                      degC
     SCR$         Instrument scan rate (from towed CTDs)     secs
     SDA$         Sea density anomaly                        Kg/m**3
     SDS$         Standard deviation of salinity             PSU
     SDT$         Standard deviation of temperature          degC
     SED1         WES sea direction.                         degrees T
     SEH1         WES sea height.                            m
     SEM$         Significant period M0/M1 of wind sea       sec
     SEP1         WES sea period.                            sec
     SER1         Instrument serial number                   ----
     SGT$         Sigma-t                                    kg/m**3
     SHA1         Ochi and Hubble spectral shape parameter   ----
                  for the most energetic peak in the
                  spectrum
     SHA2         Ochi and Hubble spectral shape parameter   ----
                  for the second most energetic peak 
                  in the spectrum
     SHP#         Ship name                                  ----
     SIDE         The side number of the tape containing     ----
                  the raw data. (Note that this 
                  duplicates a standard GF3 code used for 
                  another purpose)
     SIN1         Salinity instrument (from radio log of a   ----
                  BATHY or TESAC message)
     SLA$         The last latitude recorded                 degrees
     SLO$         The last longitude recorded                degrees
     SMI$         Interval between burst samples             mins   
     SOU$         Sounding depth (See BATH)                  m
     SPC$         Surface Current Magnitude Spread, RMS      m/s
                  deviation between measured current 
                  components and decomposition of the 
                  estimated current vector in the 
                  antenna-looking directions. For a 
                  homogeneous current, a small value 
                  indicates a good current estimate.
                  (SPRC from AGRA)
     SRT$         Sea surface reference temperature          deg.C
     SSD#         NODC Depth of sea surface current sensor   m
     SST1         Average sea temperature from the           deg.C
                  non-synoptic part of WRIPS buoy data.
     SST2         Average sea temperature from the           deg.C
                  synoptic part of WRIPS buoy data.
     STC$         Spectral type code by Juszko               ----
     STI#         NODC Surface temperature instrument type   code
     STM#         NODC Sea surface temperature methodology   code
     STP$         Sampler type                               code
     SUL$         Sulphate (SO4)                             mol/m**3
     SVA$         Specific volume anomaly                    m**3/Kg
     SVR$         SEAS version number                        code
     SWD#         Swell direction (WMO code 0877)            code
     SWM$         Significant period M0/M1 of swell          sec
     TAPE         The tape number of the tape containing     ----
                  the raw data. 
     TCD$         Total cardon dioxide                       umol/kg
     TED$         Total energy in the discrete portion of    m**2
                   the spectrum (Great Lakes 32 yr hindcast)
     TEP$         Energy in the parametric portion of the    m**2
                   spectrum (Great Lakes 32 yr hindcast)
     TIN1         Temperature instrument (from radio log     ----
                  of a BATHY or TESAC message)
     TH1$         The time, as HHMM, of the first daily      ----
                  high
     TH2$         The time, as HHMM, of the second daily     ----
                  high
     TIM#         NODC originator's time (HHMM)              ----
     TKI$         TRACKOB Indicator                          Mt Ms Mc ic
     TL1$         The time, as HHMM, of the first daily      ----
                  low
     TL2$         The time, as HHMM, of the second daily     ----
                  low
     TMN$         The time, as HHMM, of occurrance of the    ----
                  minimum value. (Note the maximum value
                  is 2359.)
     TMX$         The time, as HHMM, of occurrance of the    ----
                  maximum value. (Note the maximum value 
                  is 2359.)
     TSG$         Thermosalinograph temperature and          ----
                  salinity sensor
     TSS$         Total suspended solids                     mg/m**3
     TUR$         Turbidity                                  percent
     UND#         NODC unknown data type                     code
     URE$         Urea (H2NCONH2)                            mmol/m**3
     VAP1         AES wave period (from the METOC            sec
                  hindcast).
     VAV1         Average heave from the non-synoptic part   m
                  of WRIPS buoy data. 
     VAV2         Average heave from the synoptic part of    m
                  WRIPS buoy data. 
     VCA$         Apparent crest period of a wave            sec
     VCH1         AES wave height (from the METOC            m
                  hindcast). It is the maximum wave height 
                  found in the 5 degree square. 
     VCP1         Significant wave height of the most        m
                  energetic peak in a spectrum. 
     VCP2         Significant wave height of the second      m
                  most energetic peak in a spectrum.
     VCR1         The significant wave height calculated     m
                  over the complete frequency range of a 
                  spectrum.
     VCS$         Estimate of the significant wave height    m
                  from slope measurements.
     VEI1         Maximum E-W slope.                         ----
     VEM1         Minimum E-W slope.                         ----
     VEN1         E-W slope of the minimum wave.             ----
     VERS         Software version number                    ----
     VEX1         E-W slope of the maximum wave.             ----
     VFF1         Non-MEDS assigned quality code (see        code
                  SEAKEM WAVEC documentation).
     VIS$         Visibility code (WMO code table 4300)      code
     VMD1         Primary Wave Mean Direction, Mean wave     degrees T
                  direction of highest peak in spectrum (Dm1 
                  from AGRA)
     VMD2         Secondary Wave Mean Direction, Mean wave   degrees T
                  direction of highest peak in spectrum (Dm2 
                  from AGRA)
     VMX1         Maximum Zero Crossing Wave Height from     m
                  the non-synoptic part of WRIPS buoy 
                  data.
     VMX2         Maximum Zero Crossing Wave Height from     m
                  the synoptic part of WRIPS buoy data.
     VNI1         Maximum N-S slope.                         ----
     VNM1         Minimum N-S slope.                         ----
     VNN1         N-S slope of the minimum wave.             ----
     VNR1         Spectral narrowness defined as             ----
                  SQRT((M1*M0-M1**2)/M1) (see SEAKEM 
                  WAVEC documentation).
     VNS1         Minimum slope.                             ----
     VNX1         N-S slope of the maximum wave.             ----
     VPA$         Average apparent wave period               sec
     VPD1         Primary Wave Peak Direction, Peak wave     degrees T
                  direction of highest peak in spectrum (Dp1 
                  from AGRA)
     VPD2         Secondary Wave Peak Direction, Peak wave   degrees T
                  direction of highest peak in spectrum (Dp2 
                  from AGRA)
     VPK1         Peakedness defined as                      ----
                  2 (SUM (F(i)P2(i)dF(i)/MO2 (see SEAKEM 
                  documentation for the WAVEC)
     VPM$         Wave period of maximum wave height,        sec
                  Calculated from Tz(VTZA) (Thmax from AGRA)
     VPN1         Period of the spectral minimum             sec
     VSB#         Horizontal visibility (WMO code 4300)      code
     VSP1         Primary Wave Direction Spread, Directional degrees
                  Spread of wave energy of highest peak in 
                  spectrum (SPR1 from AGRA) 	
     VSP2         Secondary Wave Direction Spread,           degrees
                  Directional Spread of wave energy of 
                  highest peak in spectrum (SPR2 from AGRA) 	
     VSN1         Spectral minimum                           m**2/hz
     VST1         Maximum wave steepness.                    ----
     VSX1         Spectral maximum                           m**2/hz
     VSX2         Secondary Wave Spectral Density, Density   m**2/hz
                  of second highest peak in spectrum (SDp2 
                  from AGRA)
     VTD1         Dominant period.                           sec
     VTP$         The original peak period as received at    sec
                  MEDS
     VTP1         Secondary wave Peak Period, Period of the  sec
                  second highest peak in spectrum (Tp2 from 
                  AGRA)
     VTS$         The spectral peak from slope               ?????
                  measurements.
     VWH$         The significant wave height supplied by    m
                  the data collector.
     VXH$         Monthly extreme high waterlevel            m
     VXL$         Monthly extreme low waterlevel             m
     VXS1         Maximum slope.                             ----
     VZA1         Average zero crossing period from the      sec
                  non-synoptic part of WRIPS buoy data.
     VZA2        Average zero crossing period from the       sec
                     synoptic part of WRIPS buoy data.
     VZS$        Average wave period from slope measurments  sec
     WAIT        Used in the conversion of time to depth     ----
                  by ARGOS (by CSIRO)
                  t=WAIT+(FREQ*i) used in
                  depth(i)=a*t-0.001*b*t**2
     WCF$        WMO code form designator                    ----
                  eg. 18-X BUOY
     WDC$        Wind direction code table                   ----
     WDR#        Direction from which wind is blowing        code
                    (WMO code 0877)
     WFR1        Wind frictional velocity.                   m/sec
     WHT$        Height of wind generated waves              m
     WIR$        Wire out                                    m
     WMO$        WMO platform identifier number              ----
     WOI$        The WAVEOB indicator group 00IaImIp from    code
                     section 0 of the code.
     WPR$        Period of wind generated waves              sec
     WSP#        Horizontal wind speed                       knots
     WSC$        Wind force code table                       ----
     WSS$        Scalar wind speed (the arithmetic average   m/s
                  of wind speeds over the sampling period)
     WVD#        Direction (true) from which waves are       code
                     coming (WMO code 0877)
     WVH#        Wave height (WMO code 1555)                 code
     WVP#        Wave period (WMO code 3155)                 code
     XEQ$        XBT fall rate equation used (see IGOSS      code
                 table)
     YEA#         NODC originator's year                     year



     4.0 MEDS codes sorted alphabetically within GF3 tables

     General purpose codes
     ---------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     ACC$         MEDS accesion number                       ----
     ADID         AODC database ID                           ----
     ADST         Automatic gain control                     ----
     ADSV         Automatic gain control variance            ----
     AREA         NODC area code                             code
     ARG$         ARGOS number given to a platform           ----
     CCLL         Platform call sign                         ----
     CSC1         Chief scientist's name                     ----
     CSID         CSIRO database ID                          ----
     CSN$         IGOSS call sign                            ----
     CTF$         The indicator that encodes which quality   code
                  control tests for chemical data that 
                  were failed.
     CTP$         The indicator that encodes which quality   code
                  control tests on chemical data have been
                  executed. 
     DEC$         The code for why messages ceased.          code
     DRT$         The drogue type code                       code
     EAG1         Name of the exchange agency                ----
     EXP$         The originator's experiment number         ----
     GNC#         NODC cruise code                           code
     INS1         Institute                                  ----
     INTP         Instrument type (used with wavec data)     code
                   1 = Waverider
                   2 = WAVEC
                   3 = ENDECO
                   4 = Satellite waverider
     IST$         Instrument name                            ----
     JPT$         JGOFS Protocol Code Table                  ----
     NID#         NODC internal database identifier          code
     NPT#         NODC P3 format flag indicating that a      code
                  station has either only derived values or
                  at least one profile of measured values
     NUL$         A null parameter. It is used when it is    ----
                  necessary to reserve the position of
                  code.
     OCL#         NODC OCL reference number                  ----
     OCR$         The originator's cruise number             ----
     OID$         Originator's station identifier            ----
     OLS#         NODC OCL unique station number             ----
     ONM1         Originator's name                          ----
     OSI$         Originator's sample identifier             ----
     PGI#         NODC P3 software identifier                code
     PNM1         Platform name                              ----
     PLA#         NODC platform/ship code                    code
     PRO1         Project name                               ----
     PRO#         NODC project code                          code
     PTP1         Platform type                              code
     QCF$         The indicator that encodes which quality   code
                  control tests have failed for 
                  temperature and salinity data. 
     QCP$         The indicator that encodes which quality   code
                  control tests have been executed for 
                  temperature and salinity data.
     QFF$         The indicator that encodes which ORSTOM    code
                  quality control tests have failed for 
                  temperature and salinity data. 
     QFP$         The indicator that encodes which ORSTOM    code
                  quality control tests have been 
                  executed for temperature and salinity 
                  data.
     QNF#         NODC indicator of QC tests failed at the   code
                  station level
     QNP#         NODC indicator of QC tests made at the     code
                  station level
     RCRD         Indicates a record has been created.       code
     REC$         A record in the MEDS time series format.   ----
     REP$         Records that one or more profiles have     code
                  replicate samples at one or more depths. 
                  The profiles affected are encoded in the
                  same way QCF$, QCP$ are set
     SER1         Instrument serial number                   ---- 
     SHP#         Ship name                                  ----
     STI#         Surface temperature instrument type        NODC code
     SVR$         SEAS version number                        code
     UND#         NODC unknown data type                     code
     VERS         Software version number                    ----
     VFF1         Non-MEDS assigned quality code (see        code
                  SEAKEM WAVEC documentation).
     WMO$         WMO platform identifier number             ----

     Methods codes
     ---------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     MRT#         NODC instrument for referrence temperature ----
     MTH$         Links a observed value PCODE to a method   ----
                  or insturmentation PCODE
     STM#         Sea surface temperature methodolgy         code
     WAIT         Used in the conversion of time to depth    ----
                  by ARGOS (by CSIRO)

     Instrument characteristics codes
     ---------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     NET$         Net mesh size                              microns
     SCR$         Instrument scan rate (from towed CTDs)     secs

     Biological Oceanography codes
     -----------------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     CPH$         Chlorophyll-a content, determined by the   mg/m**3
                  Welchmeyer method
     PAR$         Photosynthetic active radiation            uE/m**2-s
     PAR1         Photosynthetic active radiation            unknown
     PHA$         Phaeophytin                                mg/m***3
     PRP$         Primary productivity                       mgC/m**3/hr
     PRQ$         Primary productivity                       mgC/m**3/day
     URE$         Urea (H2NCONH2)                            mmol/m**3
     TSS$         Total suspended solids                     mg/m**3

     Data Operation codes
     ---------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     MNS$         Minimum value of salinity                  PSU
     MNT$         Minimum value of temperature               degC
     MXS$         Maximum value of salinity                  PSU
     MXT$         Maximum value of temperature               degC
     NUM$         Number of values used in computation       ----
     SDT$         Standard deviation of temperature          degC
     SDS$         Standard deviation of salinity             PSU
     TKI$         TRACKOB Indicator                          Mt Ms Mc ic

     Date and time within day codes
     ------------------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     DAT#         NODC originator's date                     ----
     DDB$         The date as YYYYMMDD of deployment         ----
     DEB$         The date as YYYYMMDD of the last message   ----
                  received.
     DET$         The time as HHMM of the last message       ----
                  received.
     DHM$         Day, hour, and minute as DDHHMM and a      ----
                  real number.
     DN3$         The date as YYYYMMDD of analysis of 
                   Nitrate
     DPO$         The date as YYYYMMDD of analysis of 
                   Phosphate
     DPT$         The deployment time (GMT) as HHMM          ----
     DRD$         The date as YYYYMMDD that the drogue       ----
                  was lost
     DSO$         The date as YYYYMMDD of analysis of 
                   Silicate
     DTC$         Calibration date as YYYYMMDD               ----
     DTE$         The day, month and year as indicated in    ----
                  IGOSS messages. So DDMMY where DD is the 
                  day, MM is the month and Y is the last 
                  digit of the year.
     DTH$         The day, hour and minute of the extreme    ----
                  high
     DTL$         The day, hour and minute of the extreme    ----
                  low
     DT2$         The date as YYYYMMDD of the end of a tow.  ----
                  When this is used, the date field 
                  records the start date.
     TIM#         NODC originator's time (HHMM)              ----
     YEA#         NODC originator's year                     year

     Time and frequency codes
     ------------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     HM2$         The time as HHMM of the the end of a tow.  ----
                  When this is used, the time field 
                  records the start time.
     PDT$         The date as YYMMJ of the last position     ----
                  (from the DRIBU message)
     PTM$         The time as HHMM/ of the last position     ----
                  (from the DRIBU message)
     SMI$         Interval between burst samples             mins   

     Position and navigation codes
     -----------------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     DCLN         The magnetic declination                   degrees
     DEOW         Code to indicate if the magnetic           code
                   declination is east or west:
                   1 = East, 2 = West
     DLA$         Latitude (north +ve) at deployment         degrees
                  (see DLT$)
     DLO$         Longitude (+/- 180 west +ve) at            degrees
                  deployment
     DLT$         Latitude (north +ve) at deployment         degrees
     ELA$         The error in latitude                      degrees
     ELO$         The error in longitude                     degrees
     LAT$         The latitude in IGOSS format of DDMM       ----
                  where DD is the degrees and MM the 
                  minutes of latitude.
     LAT#         NODC originators latitude                  degrees
     LNG$         Longitude from GPS (+ West)                degrees
     LN2$         The second longitude (from DRIBU           degrees
                  message or for ocean profile data the
                  longitude records the start longitude and
                  this records the end longitude of a tow)
     LON$         The longitude in IGOSS format of DDMM      ----
                   where DD is the degrees and MM the 
                  minutes of longitude.
     LON#         NODC originators longitude                 degrees
     LTG$         Latitude from GPS (+ North)                degrees
     LT2$         The second latitude (from DRIBU            degrees
                  message or for ocean profile data the
                  latitude records the start latitude and
                  this records the end latitude of a tow)
     SLA$         The last latitude recorded                 degrees
     SLO$         The last longitude recorded                degrees

     Physical oceanography codes
     ---------------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     BKT$         Bucket sample                              ----
     BTC1         BT temperature correction                  deg.C
     BTN1         BT slide number                            ----
     BTR1         BT surface reference temperature           deg.C
     BTS1         BT surface temperature                     deg.C
     EIT$         Engine intake water sample                 ----
     EST$         The error in SST                           deg.C
     GPA$         Geopotential anomaly                       dyn.m
     HMT$         Hull mounted sensor                        ----
     HTL$         Height of the XBT launcher above the       m
                  water
     ICT$         Ice thickness                              m
     PEA$         Potential energy anomaly                   Kg-m/sec**2
     PLT$         Percent light transmittance                percent
     PRT$         Probe type code (see IGOSS code table)     code
                  NODC uses PRT#
     PRV$         Velocity probe                             m/s
     RCT$         XBT recorder type (see IGOSS code table)   code
                  This is equivalent to DKT$.
     RTC$         Reference temperature code                 code
     RTD$         Reference temperature water depth          m
     RTM$         Reference temperature                      degC
     SDA$         Sea density anomaly                        Kg/m**3
     SGT$         Sigma-t                                    kg/m**3
     SRT$         Sea surface reference temperature          deg.C
     SSD#         NODC Depth of sea surface current sensor   m
     STP$         Sampler type                               code
     SVA$         Specific volume anomaly                    m**3/Kg
     TSG$         Thermosalinograph temperature and          ----
                  salinity sensor
     TUR$         Turbidity                                  percent
     WIR$         Wire out                                   m
     XEQ$         XBT fall rate equation used (see IGOSS     code
                  table)

     Wave codes
     ----------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     ADNB         Number of blocks averaged in the           ----
                  spectrum. (Note that this is the same as 
                  NBL1) 
     ADNS         Number of samples per fourier block        ----
     AED1         AES wave direction (from METOC hindcast).  degrees
                   This is probably the wind direction. 
     AST1         Internal temperature from the              deg.C
                  non-synoptic part of WRIPS buoy data. 
     AST2         Internal temperature from the synoptic     deg.C
                  part of WRIPS buoy data. 
     CLW1         The divider network setting on the FM to   ----
                  digital conversion system
     CLW2         The ratio of playback to record speed for  ----
                  the digitizer
     CLW3         The clock frequency                        Hz
     CLW4         The percent modulation of the waverider    Percent
                  FM signal
     CLW5         The mean center frequency of the           Hz
                  waverider FM signal
     CLW6         The zero intercept on the frequency axis   Hz
                  for frequency vs height
     CLW7         The slope of the frequency/height          m/Hz
                  calibration
     CLW8         The height of the pressure cell above the  m
                  bottom
     DSP1         The Juszko directional spread factor for   ----
                  the most energetic peak in a spectrum.
     DSP2         The Juszko directional spread factor for   ----
                  the second most energetic peak in a 
                  spectrum
     ERS$         Percent residual least squares error by    ----
                  Juszko in 10 parameter model fit to
                  directional spectrum.
     FRQ1         Frequency of the most energetic peak       hertz
                  in spectrum
     FRQ2         Frequency of the second most energetic     hertz
                  peak in spectrum
     LBL1         The block length                           sec
     NBD1         The number of bad samples in a surface     ----
                  elevation time series. 
     NBL1         The number of blocks averaged to derive    ----
                  a wave spectrum.
     NWAV         The number of waves in the record          ----
     ODD1         The direction from which waves are         degrees
                  coming for the most energetic peak in
                  a spectrum
     ODD2         The direction from which waves are         degrees
                  coming for the second most energetic 
                  peak in a spectrum
     RECD         The record number of the tape containing   ----
                  the raw data. 
     SED1         WES sea direction.                         degrees T
     SEH1         WES sea height.                            m
     SEM$         Significant period M)/M1 of wind sea       sec
     SEP1         WES sea period.                            sec
     SHA1         Ochi and Hubble spectral shape parameter   ----
                  for the most energetic peak in the
                  spectrum
     SHA2         Ochi and Hubble spectral shape parameter   ----
                  for the second most energetic peak 
                  in the spectrum
     SIDE         The side number of the tape containing     ----
                  the raw data. (Note that this 
                  duplicates a standard GF3 code used for 
                  another purpose)
     SPC$         Surface Current Magnitude Spread, RMS      m/s
                  deviation between measured current 
                  components and decomposition of the 
                  estimated current vector in the 
                  antenna-looking directions. For a 
                  homogeneous current, a small value 
                  indicates a good current estimate.
                  (SPRC from AGRA)
     SST1         Average sea temperature from the           deg.C
                  non-synoptic part of WRIPS buoy data.
     SST2         Average sea temperature from the           deg.C
                  synoptic part of WRIPS buoy data.
     STC$         Spectral type code by Juszko               ----
     SWD#         Swell direction (WMO code 0877)            code
     SWM$         Significant period M0/M1 of swell          sec
     TAPE         The tape number of the tape containing     ----
                  the raw data. 
     TED$         Total energy in the discrete portion of    m**2
                   the spectrum (Great Lakes 32 yr hindcast)
     TEP$         Energy in the parametric portion of the    m**2
                   spectrum (Great Lakes 32 yr hindcast)
     VAP1         AES wave period (from the METOC            sec
                  hindcast).
     VAV1         Average heave from the non-synoptic part   m
                  of WRIPS buoy data. 
     VAV2         Average heave from the synoptic part of    m
                  WRIPS buoy data. 
     VCA$         Apparent crest period of a wave            sec
     VCH1         AES wave height (from the METOC            m
                  hindcast). It is the maximum wave height 
                  found in the 5 degree square. 
     VCP1         Significant wave height of the most        m
                  energetic peak in a spectrum.
     VCP2         Significant wave height of the second      m
                  most energetic peak in a spectrum.
     VCR1         The significant wave height calculated     m
                  over the complete frequency range of a 
                  spectrum.
     VCS$         Estimate of the significant wave height    m
                  from slope measurements.
     VEI1         Maximum E-W slope.                         ----
     VEM1         Minimum E-W slope.                         ----
     VEN1         E-W slope of the minimum wave.             ----
     VEX1         E-W slope of the maximum wave.             ----
     VMD1         Primary Wave Mean Direction, Mean wave     degrees T
                  direction of highest peak in spectrum (Dm1 
                  from AGRA)
     VMD2         Secondary Wave Mean Direction, Mean wave   degrees T
                  direction of highest peak in spectrum (Dm2 
                  from AGRA)
     VMX1         Maximum Zero Crossing Wave Height from     m
                  the non-synoptic part of WRIPS buoy 
                  data.
     VMX2         Maximum Zero Crossing Wave Height from     m
                  the synoptic part of WRIPS buoy data.
     VNI1         Maximum N-S slope.                         ----
     VNM1         Minimum N-S slope.                         ----
     VNN1         N-S slope of the minimum wave.             ----
     VNR1         Spectral narrowness defined as             ----
                  SQRT((M1*M0-M1**2)/M1) (see SEAKEM 
                  WAVEC documentation).
     VNS1         Minimum slope.                             ----
     VNX1         N-S slope of the maximum wave.             ----
     VPA$         Average apparent wave period               sec
     VPD1         Primary Wave Peak Direction, Peak wave     degrees T
                  direction of highest peak in spectrum (Dp1 
                  from AGRA)
     VPD2         Secondary Wave Peak Direction, Peak wave   degrees T
                  direction of highest peak in spectrum (Dp2 
                  from AGRA)
     VPK1         Peakedness defined as                      ----
                  2 (SUM (F(i)P2(i)dF(i)/MO2 (see SEAKEM 
                  documentation for the WAVEC)
     VPM$         Wave period of maximum wave height,        sec
                  Calculated from Tz(VTZA) (Thmax from AGRA)
     VPN1         Period of the spectral minimum             sec
     VSP1         Primary Wave Direction Spread, Directional degrees
                  Spread of wave energy of highest peak in 
                  spectrum (SPR1 from AGRA) 	
     VSP2         Secondary Wave Direction Spread,           degrees
                  Directional Spread of wave energy of 
                  highest peak in spectrum (SPR2 from AGRA) 	
     VSN1         Spectral minimum                           m**2/hz
     VST1         Maximum wave steepness.                    ----
     VSX1         Spectral maximum                           m**2/hz
     VSX2         Secondary Wave Spectral Density, Density   m**2/hz
                  of second highest peak in spectrum (SDp2 
                  from AGRA)
     VTD1         Dominant period.                           sec
     VTP$         The original peak period as received at    sec
                  MEDS
     VTP1         Secondary wave Peak Period, Period of the  sec
                  second highest peak in spectrum (Tp2 from 
                  AGRA)
     VTS$         The spectral peak from slope               ?????
                  measurements.
     VWH$         The significant wave height supplied by    m
                  the data collector.
     VXS1         Maximum slope.                             ----
     VZA1         Average zero crossing period from the      sec
                  non-synoptic part of WRIPS buoy data.
     VZA2         Average zero crossing period from the      sec
                  synoptic part of WRIPS buoy data.
     VZS$         Average wave period from slope             sec
                  measurements
     WHT$         Height of wind generated waves             m
     WPR$         Period of wind generated waves             sec
     WVD#         Direction (true) from which waves are      code
                  coming (WMO code 0877)
     WVH#         Wave height (WMO code 1555)                code
     WVP#         Wave period (WMO code 3155)                code

     Meteorology codes
     -----------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     GPT$         Pressure tendency code (see WMO code       code
                  table 0200)
     VIS$         Visibility code (WMO code table 4300)      code
     VSB#         Horizontal visibility (WMO code 4300)      code
     WDC$        Wind direction code table                   ----
     WDR#        Direction from which wind is blowing        code
                    (WMO code 0877)
     WFR1         Wind frictional velocity.                  m/sec
     WSC$        Wind force code table                       ----
     WSP#        Horizontal wind speed                       knots
     WSS$        Scalar wind speed (the arithmetic average   m/s
                  of wind speeds over the sampling period)


Geophysics codes
----------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     SOU$         Sounding depth (See BATH)                  m

Chemistry codes
---------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     B12$         Vitamin B12                                milli-microg/lt
     CDX1         Dissolved organic C = CORG DX (mg/lt)      ?????
     CPX1         Particulate C = CORG PX (mg/lt)            ?????
     FLU$         Flourescence                               %
     FLU1         Fluorescence                               mg/m**3
     FLU2         Fluorescence                               volts
     F11$         CFC11 measurements                         pmol/kg
     F12$         CFC12 measurements                         pmol/kg
     FLO1         Flouride                                   ????
     NH3$         NH3-N in micrograms/liter                  ?????
     OLP$         Particulate oil                            mg/m2
     OLW$         Total dissolved/dispersed oil              mg/m3
     OXS$         Percent Oxygen saturation                  percent
     O18$         O18/O16 ratio                              percent
     PHI$         Inorganic phosphate                        mmol/m**3
     PH1$         Replicate sample of inorganic phosphate    mmol/m**3
     PON$         Particulate Organic Nitrogen               mg/**3
     SUL$         Sulphate (SO4)                             mol/m**3
     TCD$         Total cardon dioxide                       umol/kg

Special IGOSS Indicator codes
-----------------------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     APC1         Averaging period (in TRACKOB: mC) for      minutes
                  surface current
     APR$         The group in TRACKOB supplying the         ----
                  averging periods used for temperature,
                  salinity, currents and the units of the
                  current.
     APS1         Averaging period (in TRACKOB: mS) for      minutes
                  salinity
     APT1         Averaging period (in TRACKOB: mT) for      minutes
                  sea surface temperature
     BCI$         The indicator k5 used in the BATHY code    code
                  to tell the method of current 
                  measurement. This is equivalent to CCGM
     BQA$         QA in BUOY code form                       ----
     BYM$         Previous bulletin year-month as YYMM       ----
     DKT$         Recorder type for IGOSS BTs. This is       ----
                  equivalent to RCT$
     FRE$         Code for fall rate equation used. See      code
                  IGOSS code table.
     GE1$         Contents of the first engineering group    code
                  in a DRIBU message                    
     GE2$         Contents of the second engineering group   code
                  in a DRIBU message                    
     GE3$         Contents of the third engineering group    code
                  in a DRIBU message                    
     GIN$         Contents of the group 1QpQ2QtwQ4 in the    code
                  DRIBU message
     GGC$         The 5 character 66... group used in a      code
                  TESAC message to indicate information 
                  about the subsurface data collection. 
     GGI$         The 5 character 88.. group used in a       code
                  BATHY and a TESAC message to indicate 
                  information about the subsurface profile.
     GGK6         Method of removing ship velocity code      code
                  (k6 of a TESAC message)
     GG1$          The contents of the group 111QdQx in      ----
                     FM18-X BUOY code form
     GG2$          The contents of the group 222QdQx in      ----
                     FM18-X BUOY code form
     GG3$          The contents of the group 333QdQx in      ----
                     FM18-X BUOY code form
     PEQ$         Probe type and fall rate equation code     ----
                  table (IGOSS)
     PFR$         WMO codes 1771 (IxIxIx) + 4770 (XrXr)      code
                   as used in the JJYY BATHY code
     SIN1         Salinity instrument (from radio log of a   ----
                  BATHY or TESAC message)
     TIN1         Temperature instrument (from radio log     ----
                  of a BATHY or TESAC message)
     WCF$        WMO code form designator                    ----
                  eg. 18-X BUOY
     WOI$        The WAVEOB indicator group 00IaImIp from    code
                     section 0 of the code.

Water Level codes
-----------------
     PPPP  KMMS       Parameter Name                         Units
     ----  ----   ---------------------------------------    --------
     DMH$         The day of the month, as DD, of the        day
                  extreme high value.
     DML$         The day of the month, as DD, of the        day
                  extreme low value.
     DMN$         The daily mean value.                      m
     HGR$         Hourly height water level derived from     m
                  MEDS Gradicon to cm precision            
     HIN$         The integrated water level for an hour.    m
     HIS$         Hourly height water level derived from     m
                  unknown historical sources to cm 
                  precision 
     HL1$         The height of the first daily low          m
     HL2$         The height of the second daily low         m
     HMN$         The minimum height read in an hour.        m
     HMX$         The maximum height read in an hour.        m
     HOG$         Hourly height water level derived from     m
                  Ogdensberg to centimeter precision
     HOH$         Hourly height water level derived from     m
                  Ontario Hydro to centimeter precision 
     HPR$         Hourly height predicted value.             m
     HSC$         Hourly height water level derived from     m
                  MEDS Scalar to cm precision 
     HTH$         Hourly heights supplied from the West      m
                  Coast.
     HW1$         The height of the first daily high         m
     HW2$         The height of the second daily high        m
     HZY$         Hourly height water level derived from     m
                  MEDS Zycor to cm precision
     H00$         Hourly heights supplied by MEDS from       m
                  TATS gauges.
     H15$         Height value read 15 minutes after the     m
                  hour.
     H30$         Height value read 30 minutes after the     m
                  hour.
     H45$         Height value read 45 minutes after the     m
                  hour.
     H60$         Hourly height water level derived from     m
                  TATS stations and reduced by rounding 
                  to a precision of cm
     LW1$         The height of the first daily low          m
     LW2$         The height of the second daily low         m
     MMN$         Monthly mean waterlevel                    m
     TMN$         The time, as HHMM, of occurrance of the    ----
                  minimum value. (Note the maximum value
                  is 2359.)
     TMX$         The time, as HHMM, of occurrance of the    ----
                  maximum value. (Note the maximum value 
                  is 2359.)
     TH1$         The time, as HHMM, of the first daily      ----
                  high
     TH2$         The time, as HHMM, of the second daily     ----
                  high
     TL1$         The time, as HHMM, of the first daily      ----
                  low
     TL2$         The time, as HHMM, of the second daily     ----
                  low
     VXH$         Monthly extreme high waterlevel            m
     VXL$         Monthly extreme low waterlevel             m