GLA13 Data Dictionary (pdf) - ICESat - NASA

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GLAH13 Product Data Dictionary1/30/13 1:04 PM(NOT_SET)parameters. It is directly taken from GLA05 parameterd_wfFitSDev_2 (standard).BinaryDatad_refRngDOUBLE(UNLIMITED)Reference Range(altimeter_range)metersRange in distance calculated from the time betweenthe centroid of the transmit pulse and the farthestgate from the spacecraft of the received pulse. Seethe rngcorrflg to determine any corrections that havebeen applied.Rel 33GLASBinaryDataDS_UTCTime_40Group: Data_40HZ/Elevation_CorrectionsThis group contains elevation-related corrections.d_dTropLabelDatatype(Dimensions)DOUBLE(UNLIMITED)long_name(standard_name)Range Correction, Dry Troposphere(altimeter_range_correction_due_to_dry_troposphere)metersunits description source coordinatesThe range correction due to the drytroposphere. Validity is based on results offinding a range with the standard fit.Rel 33GLASBinaryDataDS_UTCTime_40d_wTropDOUBLE(UNLIMITED)Range Correction_Wet Troposphere(altimeter_range_correction_due_to_wet_troposphere)metersThe range correction due to the wettroposphere. (See ATBDs)Rel 33GLASBinaryDataDS_UTCTime_40d_satElevCorrDOUBLE(UNLIMITED)Saturation Elevation Correction(NOT_SET)metersCorrection to elevation for saturatedwaveforms. This correction has NOT beenapplied to the data. To apply it, SUBTRACTthe correction from the range estimate. Toapply the correction to the elevations it mustbe ADDED to the elevation estimates.Rel 33GLASBinaryDataDS_UTCTime_40d_ElevBiasCorrDOUBLE(UNLIMITED)Elevation Bias Correction(NOT_SET)metersCorrection to elevation based on post flightanalysis for biases determined for eachcampaign. This bias correction has not beenapplied to the data. To apply it, SUBTRACTthe correction from the range estimate. Toapply the correction to the elevations it mustbe ADDED to the elevation estimates.Rel 33GLASBinaryDataDS_UTCTime_40Group: Data_40HZ/Elevation_AnglesThis group contains pointing angle parameters.Labeld_beamAzimuthd_beamCoelvDatatype(Dimensions)DOUBLE(UNLIMITED)DOUBLE(UNLIMITED)Azimuth(NOT_SET)Co-elevation(NOT_SET)long_name(standard_name)degreesdegreesunits description source coordinatesThe direction, eastwards from north, of the laser beamvector as seen by an observer at the laser ground spotviewing toward the spacecraft (i.e., the vector from theground to the spacecraft). When the spacecraft isprecisely at the geodetic zenith, the value will be99999 degrees.Co-elevation (CE) is direction from vertical of the laserbeam as seen by an observer located at the laserground spot.Rel 33GLASBinaryDataRel 33GLASBinaryDataDS_UTCTime_40DS_UTCTime_40Group: Data_40HZ/Elevation_OffsetsThe group contains elevation offsets. These offsets allow the elevation for the specific surface types to be derived.Labeld_cntRngOffd_SiRngFstd_siRngOffd_SigBegOffd_SigEndOffd_TrshRngOffDatatype(Dimensions)DOUBLE(UNLIMITED)DOUBLE(UNLIMITED)DOUBLE(UNLIMITED)DOUBLE(UNLIMITED)DOUBLE(UNLIMITED)DOUBLE(UNLIMITED)long_name(standard_name)Centroid Range Offset(NOT_SET)Sea ice range increment to first peak(NOT_SET)Sea Ice Range Offset(NOT_SET)Signal Begin Range Offset(NOT_SET)Signal End Range Offset(NOT_SET)Threshold Retracker Range Offset(NOT_SET)metersMetersMetersmetersmetersmetersunits description source coordinatesOffset to be added to d_refRng to give the range indistance to the location of the centroid of the receivedecho from signal begin through signal end defined bythe standard parameters.Range increment to be added to reference range tocompute the sea ice specific range. This wasdetermined from centroid of first peak in sea icegaussian fit.Range offset to be added to d_refRng to calculate therange using the algorithm deemed appropriate for seaice.Offset to be added to d_refRng to give the range indistance to the location of the received echocalculated at the beginning of signal (closest to thespacecraft) using standard parameters.Offset to be added to d_refRng to give the range indistance to the location of the received echocalculated at the end of signal (farthest from thespacecraft) using standard parameters.Offset to be added to d_refRng to give the range indistance to the threshold retracker location of thereceived echo using standard parameters.Rel 33GLASBinaryDataRel 33GLASBinaryDataRel 33GLASBinaryDataRel 33GLASBinaryDataRel 33GLASBinaryDataRel 33GLASBinaryDataDS_UTCTime_40DS_UTCTime_40DS_UTCTime_40DS_UTCTime_40DS_UTCTime_40DS_UTCTime_40file:///Volumes/Users/jelee1/Development/glashdf/glas_hdf/doc/GLAH13_data_dict.htmlPage 12 of 33
GLAH13 Product Data Dictionary1/30/13 1:04 PMGroup: Data_40HZ/QualityThis group contains quaility-related parameters and flags.Labelrng_uqf_sigbeg1_flgDatatype(Dimensions)INTEGER_1(UNLIMITED)long_name(standard_name)Range Offset Quality/Use Flag(NOT_SET)NOT_SETunits description source coordinatesSignal begin range increment flag, standardflag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_sigend1_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETSignal end range increment flag (standard).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_thres1_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETThreshold retracker range increment flag (standard).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_cent1_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETCentroid retracker range increment flag (standard).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_sigbeg2_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETSignal begin range increment flag (alternate).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_sigend2_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETSignal end range increment flag (alternate).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_thres2_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETThreshold retracker range increment flag (alternate).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_cent2_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETCentroid retracker range increment flag (alternate).flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_is_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETIce sheet range increment flag.flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_si_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETSea ice range increment flag.flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_ld_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETLand range increment flag.flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40rng_uqf_oc_flgINTEGER_1(UNLIMITED)Range Offset Quality/Use Flag(NOT_SET)NOT_SETOcean range increment flag.flag_valuesflag_meanings0, 1 valid not_validRel 33GLASBinaryDataDS_UTCTime_40sat_corr_flgINTEGER_1(UNLIMITED)Saturation Correction Flag(NOT_SET)NOT_SETSaturation Correction Flag; Indicates if the saturation isNot Saturated (i_satNdx=2 & i_pctSat=2 & i_pctSat>=2.0 & Full Width*
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