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NASA Distributed Active Archive Center (DAAC) at NSIDC

ICESat / GLAS Data

Ice, Cloud, and land Elevation / Geoscience Laser Altimeter System

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Product Format and Definition Changes with Release-28


Changes are summarized below. More information about product formats is available on the NASA Wallops Flight Facility's Web site at Version 5.3 GLAS Files.

GLA01

  • Updated i_txWfPk_Flag description and PDF

GLA04

  • Updated i_txWfPk_Flag description and PDF

GLA05

  • Added a flag to i_WFqual to indicate if the waveform is clipped
  • Updated i_wfFitSDev_1, i_wfFitSDev_2, i_sDEVFitTr to reflect the product unit change to microvolts*10
  • Updated i_parmTr to reflect the product unit change to microV*100
  • Removed gwi_satFlagLo, gwi_satFlagHi, & gwi_satFlagHiF from i_WFqual, and used i_satNdx instead
  • Improved description of i_numiters, i_sDEVNsOb1 & i_maxRecAmp

GLA06

  • Added i_sDEVNsOb1 & i_maxRecAmp
  • Added i_pctSAT
  • The saturation correction flag (i_satCorrFlg) has been redefined
  • Improved documentation for i_satNdx
  • Changed the definition of bits 13-15 of i_RngOffQF to spare
  • Improved description of i_MRC_af
  • Changed the scale for d_satNrgCorr from 0.001d0 to 1.0d-17, and for d_satPwdCorr from 0.001d0 to 0.01d0
  • Changed the name of i_satRngCorr to i_satElevCorr
  • Improved description of i_satElevCorr
  • Product units for i_srf_slope has been changed to 0.01 deg

GLA09

  • The descriptions and PDF layouts of the following parameters have been improved: i_FRCL_Flag, i_HRCL_Flag, i_MRCL_Flag, i_LRCL_Flag

GLA10

  • The descriptions for the following parameters in GLA10 were corrected: i_cld1_sval_uf, i_aer4_sval_uf, i_cld1_bs_flag, i_cld1_ext_flag

GLA12

  • Added i_pctSAT
  • The saturation correction flag (i_satCorrFlg) has been redefined
  • Added i_maxRecAmp and i_sDevNsOb1
  • Improved documentation for i_satNdx
  • Improved description of i_MRC_af
  • Changed the scale for d_satNrgCorr from 0.001d0 to 1.0d-17, and for d_satPwdCorr from 0.001d0 to 0.01d0
  • Changed the name of i_satRngCorr to i_satElevCorr
  • Improved description of i_satElevCorr
  • Product units for i_IsSlopeEmp has been changed to 0.01 deg

GLA13

  • Added i_pctSAT
  • The saturation correction flag (i_satCorrFlg) has been redefined
  • Improved description of i_RufSeaIce
  • Added i_maxRecAmp and i_sDevNsOb1
  • Improved documentation for i_satNdx
  • Improved description of i_MRC_af
  • Changed the scale for d_satNrgCorr from 0.001d0 to 1.0d-17, and for d_satPwdCorr from 0.001d0 to 0.01d0
  • Changed the name of i_satRngCorr to i_satElevCorr
  • Improved description of i_satElevCorr

GLA14

  • Added i_pctSAT
  • The saturation correction flag (i_satCorrFlg) has been redefined
  • Added i_maxRecAmp and i_sDevNsOb1
  • Improved documentation for i_satNdx
  • Improved description of i_MRC_af
  • Changed the scale for d_satNrgCorr from 0.001d0 to 1.0d-17, and for d_satPwdCorr from 0.001d0 to 0.01d0
  • Changed the name of i_satRngCorr to i_satElevCorr
  • Improved description of i_satElevCorr
  • Product units for i_LandSlopeLast has been changed to 0.01 deg.

GLA15

  • Added i_pctSAT
  • The saturation correction flag (i_satCorrFlg) has been redefined
  • Values for i_OcMeanElev, i_OcRufRMS are now filled
  • Added i_srf_slope, i_srf_ruf, i_maxRecAmp and i_sDevNsOb1
  • Improved documentation for i_satNdx
  • Improved description of i_MRC_af
  • Changed the scale for d_satNrgCorr from 0.001d0 to 1.0d-17, and for d_satPwdCorr from 0.001d0 to 0.01d0
  • Changed the name of i_satRngCorr to i_satElevCorr
  • Improved description of i_satElevCorr
  • Product units for i_srf_slope has been changed to 0.01 deg.