Updated: 02 Dec 2019
4.2.7. DATA_START_DATE
The global attribute DATA_START_DATE specifies the earliest date/time found in the data file. The DATA_START_DATE format is the ISO 8601 data/time described in Sections 3.3.1and 3.3.2. Fractions of a second shall be rounded down to the nearest second.
Type: STRING
Entry: Single field
Format: ISO 8601 date/time
Example: DATA_START_DATE = 20010124T110000Z
| Type | Comment | Debate |
| ABSORPTION.COEFFICIENT | - | - |
| AEROSOL.ABSORPTION.OPTICAL.DEPTH | - | - |
| AEROSOL.ABSORPTION.OPTICAL.DEPTH.LEVEL | OVP | - |
| AEROSOL.ASYMMETRY.FACTOR | - | - |
| AEROSOL.BACKSCATTER.RATIO | - | - |
| AEROSOL.COLUMN | - | - |
| AEROSOL.DEPOLARIZATION.RATIO | - | - |
| AEROSOL.EXTINCTION.COEFFICIENT | - | - |
| AEROSOL.INDEX | - | - |
| AEROSOL.LAYER.HEIGHT | - | - |
| AEROSOL.OPTICAL.DEPTH | - | - |
| AEROSOL.OPTICAL.DEPTH.LEVEL | OVP | - |
| AEROSOL.OPTICAL.DEPTH.STRATOSPHERIC | - | - |
| AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC | - | - |
| AEROSOL.SINGLE.SCATTERING.ALBEDO | - | - |
| AEROSOL.SINGLE.SCATTERING.ALBEDO.LEVEL | OVP | - |
| AEROSOL.TYPE | - | - |
| AIR.MASS | NDACC FTIR | - |
| ALBEDO.SURFACE | - | - |
| ALTITUDE | - | - |
| ALTITUDE.BOUNDARIES | Upper and lower boundaries of a partial column altitude grid. | - |
| ALTITUDE.GPH.BOUNDARIES | - | - |
| ALTITUDE.GPH | Geopotential Height | - |
| ALTITUDE.INSTRUMENT | - | - |
| ANEMOMETER.HEIGHT | - | - |
| ANGLE | EVDC | - |
| ANGLE.LUNAR | - | - |
| ANGLE.SOLAR | Solar angle | - |
| ANGLE.VIEW | Viewing angle | - |
| ATMOSPHERIC.TRANSMISSION | EVDC | - |
| AUXILIARY.PARAMETERS | used for SONDE | - |
| BACKSCATTERING.COEFFICIENT | - | - |
| BAROMETRIC.PRESSURE | EVDC | - |
| BPA | Bleached Particle Absorption | - |
| BrO.COLUMN | - | - |
| BrO.COLUMN.PARTIAL | - | - |
| BrO.COLUMN.SLANT | - | - |
| BrO.COLUMN.SLANT.DIFFERENTIAL | - | - |
| BrO.COLUMN.SLANT.TROPOSPHERIC | - | - |
| BrO.COLUMN.STRATOSPHERIC | - | - |
| BrO.COLUMN.TROPOSPHERIC | - | - |
| BrO.MIXING.RATIO | - | - |
| C2H2.COLUMN | - | - |
| C2H2.COLUMN.PARTIAL | - | - |
| C2H2.MIXING.RATIO | - | - |
| C2H6.COLUMN | - | - |
| C2H6.COLUMN.PARTIAL | - | - |
| C2H6.MIXING.RATIO | PPV | - |
| CCl2F2.COLUMN | - | - |
| CCl2F2.COLUMN.PARTIAL | - | - |
| CCl2F2.MIXING.RATIO | - | - |
| CCl3F.COLUMN | - | - |
| CCl3F.COLUMN.PARTIAL | - | - |
| CCl3F.MIXING.RATIO | - | - |
| CFC11.MIXING.RATIO | - | - |
| CFC12.MIXING.RATIO | - | - |
| CH4.COLUMN | - | - |
| CH4.COLUMN | EVDC | - |
| CH4.COLUMN.PARTIAL | - | - |
| CH4.MIXING.RATIO | - | - |
| CH4.NUMBER.DENSITY | - | - |
| CHF2Cl.COLUMN | - | - |
| CHF2Cl.COLUMN.PARTIAL | - | - |
| CHF2Cl.MIXING.RATIO | - | - |
| CHL.1.CONCENTRATION | - | - |
| CHL.1.INDEX | - | - |
| CHL.2.INDEX | - | - |
| CHL.2.INDEX | - | - |
| CHL.2.INDEX | - | - |
| CHL.A.CONCENTRATION | - | - |
| CHOCHO.COLUMN | - | - |
| CHOCHO.COLUMN.PARTIAL | - | - |
| CHOCHO.COLUMN.TROPOSPHERIC | - | - |
| CHOCHO.MIXING.RATIO | - | - |
| ClO.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| ClONO2.COLUMN | - | - |
| ClONO2.COLUMN.PARTIAL | - | - |
| ClONO2.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| CLOUD.BOTTOM.HEIGHT | - | - |
| CLOUD.FRACTION | OVP | - |
| CLOUD.LAYER.THICKNESS | EVDC | - |
| CLOUD.TOP.HEIGHT | - | - |
| CLOUD.TOP.PRESSURE | - | - |
| CO2.COLUMN | - | - |
| CO2.COLUMN.PARTIAL | - | - |
| CO2.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| CO2.NUMBER.DENSITY | - | - |
| CO.COLUMN | - | - |
| CO.COLUMN.PARTIAL | - | - |
| CO.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| CO.NUMBER.DENSITY | - | - |
| COF2.COLUMN | - | - |
| COF2.COLUMN.PARTIAL | - | - |
| COF2.MIXING.RATIO | - | - |
| COLOUR.INDEX | Wavelength ratio derived from UVVIS.SAOZ instruments | - |
| DATETIME | - | - |
| DATETIME.START | - | - |
| DATETIME.STOP | - | - |
| DAY.OF.YEAR | EVDC | - |
| DENSITY.DRY | - | - |
| DENSITY | NDACC LIDAR T | - |
| DEPTH | - | - |
| DEPTH.KD | For MERIS validation | - |
| DEPTH.SEA.FLOOR | - | - |
| DEPTH.SECCHI | Depth using Secchi disk | - |
| DEW.POINT.TEMPERATURE | - | - |
| DISCOLOUR.CODE | For MERIS validation | - |
| DISTANCE.SHORE | - | - |
| F12.COLUMN | - | - |
| F22.COLUMN | - | - |
| FLAG.ALGORITHM | - | - |
| FLAG.ALGORITHM.LEVEL | OVP | - |
| FLAG.MEASUREMENT.QUALITY | OVP | - |
| FLAG.PROCESSING.QUALITY | OVP | - |
| FLAG.TARGET | - | - |
| FREQUENCY.BIN | GECA | - |
| FREQUENCY.SIGNAL | Radio Occultation | - |
| H2CO.COLUMN | - | - |
| H2CO.COLUMN.PARTIAL | - | - |
| H2CO.COLUMN.TROPOSPHERIC | - | - |
| H2CO.MIXING.RATIO | - | - |
| H2.MIXING.RATIO | - | - |
| H2O.COLUMN | - | - |
| H2O.COLUMN.PARTIAL | - | - |
| H2O.COLUMN.STRATOSPHERIC | - | - |
| H2O.COLUMN.TROPOSPHERIC | - | - |
| H2O.LIQUID.COLUMN | - | - |
| H2O.MIXING.RATIO | - | - |
| H2O.NUMBER.DENSITY | - | - |
| HCFC22.COLUMN | - | - |
| HCFC22.COLUMN.PARTIAL | - | - |
| HCFC22.MIXING.RATIO | PPV | - |
| HCl.COLUMN | - | - |
| HCl.COLUMN.PARTIAL | - | - |
| HCl.MIXING.RATIO | - | - |
| HCl.NUMBER.DENSITY | - | - |
| HCN.COLUMN | - | - |
| HCN.COLUMN.PARTIAL | - | - |
| HCN.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| HCOOH.COLUMN | - | - |
| HCOOH.COLUMN.PARTIAL | - | - |
| HCOOH.MIXING.RATIO | - | - |
| HEIGHT.TERRAIN | - | - |
| HF.COLUMN | - | - |
| HF.COLUMN.PARTIAL | - | - |
| HF.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| HNO3.COLUMN | - | - |
| HNO3.COLUMN.PARTIAL | - | - |
| HNO3.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| HNO3.NUMBER.DENSITY | - | - |
| HONO.COLUMN | - | - |
| HONO.COLUMN.PARTIAL | - | - |
| HONO.COLUMN.TROPOSPHERIC | - | - |
| HONO.MIXING.RATIO | - | - |
| HUMIDITY.RELATIVE | Relative humidity (%) | - |
| HUMIDITY.SPECIFIC | - | - |
| INTEGRATION.TIME | - | - |
| INTERNAL.BOX.TEMPERATURE | - | - |
| INTERNAL.INSTRUMENT.TEMPERATURE | - | - |
| IO.COLUMN | - | - |
| IO.COLUMN.PARTIAL | - | - |
| IO.COLUMN.STRATOSPHERIC | - | - |
| IO.COLUMN.TROPOSPHERIC | - | - |
| IO.MIXING.RATIO | - | - |
| IRRADIANCE.DOWNWELLED | - | - |
| IRRADIANCE.UPWELLED | - | - |
| LAND.SURFACE.TEMPERATURE | - | - |
| LATITUDE | - | - |
| LATITUDE.INSTRUMENT | - | - |
| LEAF.AREA.INDEX | - | - |
| LEVEL | EVDC | - |
| LONGITUDE | - | - |
| LONGITUDE.INSTRUMENT | - | - |
| N2.COLUMN | - | - |
| N2O.COLUMN | - | - |
| N2O.COLUMN.PARTIAL | - | - |
| N2O.MIXING.RATIO | - | - |
| N2O.NUMBER.DENSITY | - | - |
| NH3.COLUMN | - | - |
| NO2.COLUMN | - | - |
| NO2.COLUMN.PARTIAL | - | - |
| NO2.COLUMN.SLANT | - | - |
| NO2.COLUMN.SLANT.DIFFERENTIAL | - | - |
| NO2.COLUMN.STRATOSPHERIC | - | - |
| NO2.COLUMN.TROPOSPHERIC | - | - |
| NO2.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| NO2.NUMBER.DENSITY | - | - |
| NO3.MIXING.RATIO | - | - |
| NO3.NUMBER.DENSITY | - | - |
| NO.COLUMN | - | - |
| NO.COLUMN.PARTIAL | - | - |
| NO.MIXING.RATIO | - | - |
| NO.NUMBER.DENSITY | - | - |
| NOY.MIXING.RATIO | - | - |
| NUMBER.DENSITY | - | - |
| O3.COLUMN | - | - |
| O3.COLUMN.PARTIAL | - | - |
| O3.COLUMN.SLANT | - | - |
| O3.COLUMN.SLANT.DIFFERENTIAL | - | - |
| O3.COLUMN.STRATOSPHERIC | - | - |
| O3.COLUMN.TROPOSPHERIC | - | - |
| O3.MIXING.RATIO | Volumetric mixing ratio (ppv) | - |
| O3.NUMBER.DENSITY | - | - |
| O3.PARTIAL.PRESSURE | - | - |
| O4.COLUMN | - | - |
| OClO.COLUMN | - | - |
| OClO.COLUMN.PARTIAL | - | - |
| OClO.COLUMN.SLANT | - | - |
| OClO.COLUMN.SLANT.DIFFERENTIAL | - | - |
| OClO.COLUMN.STRATOSPHERIC | - | - |
| OClO.MIXING.RATIO | - | - |
| OClO.NUMBER.DENSITY | - | - |
| OCS.COLUMN | - | - |
| OCS.COLUMN.PARTIAL | - | - |
| OCS.MIXING.RATIO | - | - |
| OH.COLUMN | - | - |
| OPACITY.ATMOSPHERIC | - | - |
| OPACITY.ATMOSPHERIC.VERTICAL | - | - |
| ORBIT.NUMBER | - | - |
| PATH.DIFFERENCE | - | - |
| PIXEL.DISTANCE | - | - |
| PIXEL.NUMBER | - | - |
| POTENTIAL.VORTICITY | EVDC | - |
| PRESSURE | - | - |
| PRESSURE.BOUNDARIES | - | - |
| PRESSURE.DRY | - | - |
| PRESSURE.LEVEL.INDEX | - | - |
| PUMP.CORRECTION | sonde | - |
| RADIANCE.DOWNWELLED.SKY | EVDC | - |
| RADIANCE.DOWNWELLING | - | - |
| RADIANCE.UPWELLED | - | - |
| RADIANCE.UPWELLING | - | - |
| RANGE | - | - |
| REFLECTANCE | - | - |
| REFLECTANCE.RHOW | Water-leaving reflectance | - |
| REFLECTIVITY | - | - |
| REFRACTIVITY | Radio Occultation | - |
| SALINITY | - | - |
| SEA.STATE | - | - |
| SEA.SURFACE.HEIGHT | - | - |
| SEA.SURFACE.PRESSURE | - | - |
| SEA.SURFACE.TEMPERATURE | - | - |
| SEA.SURFACE.TEMPERATURE.SKIN | - | - |
| SEA.SURFACE.TEMPERATURE.SUBSKIN | GECA | - |
| SEA.SURFACE.WAVE.HEIGHT.SIGNIFICANT | GECA | - |
| SEA.SURFACE.WAVE.HEIGHT.SWELL | GECA | - |
| SEA.SURFACE.WAVE.SPECTRAL.DENSITY.VARIANCE | GECA | - |
| SF6.COLUMN | - | - |
| SF6.COLUMN.PARTIAL | - | - |
| SF6.MIXING.RATIO | - | - |
| SITE.CROP | - | - |
| SITE.FIELD | - | - |
| SITE.POINT | - | - |
| SKY.CODE | - | - |
| SKY.CONDITION | - | - |
| SO2.COLUMN | - | - |
| SO2.COLUMN.PARTIAL | - | - |
| SO2.COLUMN.STRATOSPHERIC | - | - |
| SO2.COLUMN.TROPOSPHERIC | - | - |
| SO2.MIXING.RATIO | - | - |
| SOURCE.PRODUCT | - | - |
| SPEED | - | - |
| SURFACE.CODE | - | - |
| SURFACE.PRESSURE | Pressure at surface (NDACC FTIR) | - |
| SURFACE.TEMPERATURE | Temperature at surface (NDACC FTIR) | - |
| TEMPERATURE | - | - |
| TEMPERATURE.BRIGHTNESS | - | - |
| TEMPERATURE.DRY | - | - |
| TEMPERATURE.RADIOMETRIC | - | - |
| THETA | - | - |
| TROPOSPHERIC.DELAY | GPS measurement delay | - |
| TSM.CONCENTRATION | - | - |
| UV.INDEX | EVDC | - |
| VISIBILITY | - | - |
| WAVE.DIRECTION | - | - |
| WAVELENGTH | - | - |
| WAVELENGTH.CENTRAL | - | - |
| WAVELENGTH.FWHM | - | - |
| WAVENUMBER | EVDC | - |
| WAVE.TYPE | - | - |
| WIND.DIRECTION | - | - |
| WIND.SPEED | - | - |
| YSBPA | Yellow Substance + Bleached Particle Absorption | - |
| YS | Yellow Substance | - |
| AVERAGE.WAVE.PERIOD | - | - |
| DOMINANT.WAVE.DIRECTION | - | - |
| DOMINANT.WAVE.PERIOD | - | - |
| O2.DISSOLVED.MIXING.RATIO | - | - |
| O2.DISSOLVED.NUMBER.DENSITY | - | - |
| PROFILE.DATA.MODE | - | - |
| PROFILE.DIRECTION | - | - |
| SEA.DEPTH | - | - |
| SIGNIFICANT.WAVE.HEIGHT | - | - |
| SONDE.BATTERY.VOLTAGE | - | - |
| SONDE.PUMP.CURRENT | - | - |
| SONDE.RAW.CURRENT | - | - |
| WATER.PRESSURE | - | - |
| WATER.TEMPERATURE | - | - |
| WAVE.DIRECTIONAL.SPECTRUM | - | - |
| WAVE.FREQUENCY.SPECTRUM | - | - |
| WIND.SPEED.GUST | - | - |
| ICE.TEMPERATURE | - | - |
| POTENTIAL.TEMPERATURE | - | - |
| Type | Comment | Debate |
| A442 | EVDC | - |
| ABSORPTION.DIFFERENTIAL | for DIAL | - |
| ABSORPTION.DIFFERENTIAL.STD | - | - |
| ABSORPTION | EVDC | - |
| ABSORPTION.LUNAR | - | - |
| ABSORPTION.SOLAR | - | - |
| APRIORI | EVDC | - |
| AZIMUTH | - | - |
| B442 | EVDC | - |
| BACKSCATTER | - | - |
| BACKSCATTER.RAMAN | - | - |
| BACKSCATTER.SOLAR | - | - |
| BACKSCATTER.STD | - | - |
| DIFF.SAT.BUOY | EVDC | - |
| DIFFSLANT | EVDC | - |
| DIFFSLANT.ZENITH | EVDC | - |
| DIRECTIONAL | GECA | - |
| DRYW | EVDC | - |
| EASTWARD | GECA | - |
| ELEVATION | EVDC | - |
| EMISSION | - | - |
| FOV | EVDC | - |
| HPLC | EVDC | - |
| INDEPENDENT | Generic Term | - |
| INSITU | - | - |
| INTERFEROGRAMME | EVDC | - |
| LIMB | EVDC | - |
| NADIR | EVDC | - |
| NORTHWARD | GECA | - |
| OCCULTATION.SOLAR | With reference to the solar occultation | - |
| PARALLEL | EVDC | - |
| PERPENDICULAR | EVDC | - |
| REFRACTION | - | - |
| SAMPLE | - | - |
| SCATTER.SOLAR | - | - |
| SCATTER.SOLAR.OFFAXIS | - | - |
| SCATTER.SOLAR.ZENITH | - | - |
| SKY | EVDC | - |
| SPECTRAL | GECA | - |
| SP | EVDC | - |
| TRANSECT | EVDC | - |
| U | EVDC | - |
| V | EVDC | - |
| W | EVDC | - |
| ZENITH | - | - |
| ZENITH.ASTRONOMICAL | - | - |
| CENTRAL.FREQUENCY | - | - |
| FREQUENCY.RANGE | - | - |
| GPS | - | - |
| SPECTRAL.DENSITY | - | - |
| R1 | BUOY | - |
| R2 | BUOY | - |
| ALPHA1 | BUOY | - |
| ALPHA2 | BUOY | - |
| DERIVED | - | - |
| Type | Comment | Debate |
| AMF | Air Mass Factor | - |
| APPARENT | EVDC | - |
| APRIORI | - | - |
| APRIORI.CONTRIBUTION | - | - |
| ASTRONOMICAL | EVDC | - |
| AVK | Averaging Kernel | - |
| CONTRIBUTION | EVDC | - |
| FINAL | - | - |
| FLAG | EVDC | - |
| INITIALIZATION | NDACC LIDAR T | - |
| MEAN | - | - |
| MEASUREMENT.SPACING | EVDC | - |
| MEDIAN | - | - |
| NORMALIZATION | NDACC LIDAR T | - |
| RESOLUTION.ALTITUDE | - | - |
| RESOLUTION.ALTITUDE.DFCUTOFF | NDACC LIDAR | - |
| RESOLUTION.ALTITUDE.STD | NDSC LIDAR WG standard altitude resolution | - |
| RESOLUTION | EVDC | - |
| UNCERTAINTY.RANDOM | - | - |
| UNCERTAINTY.RELATIVE | - | - |
| UNCERTAINTY.RMS | - | - |
| UNCERTAINTY.STDEV | - | - |
| UNCERTAINTY.SYSTEMATIC | - | - |
| UNCERTAINTY.TOTAL | - | - |
| AVW | Averaging weights | - |
| CALIBRATION.FACTOR | - | - |
| CALIBRATION.SOURCE | - | - |
| CALIBRATION.UNCERTAINTY | - | - |
| RESOLUTION.ALTITUDE.ORIGINATOR | - | - |
| TRANSFER.FUNCTION | - | - |
| UNCERTAINTY | - | - |
| UNCERTAINTY.CORRELATED | - | - |
| UNCERTAINTY.ORIGINATOR | - | - |
| UNCERTAINTY.UNCORRELATED | - | - |