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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-33


Changes are summarized below. More information about product formats is available on the NASA Wallops Flight Facility's Web site at Version 6.0 GLAS Files.


GLA01-GLA04

  • No changes

GLA05

  • Changed i_PADPoint(6,40), i_PODFixedPos(6,40) to i_spare43(12,40)
  • Renamed i_refRng to i_refRngNs
  • Removed i_atmQF, replaced with spare

GLA06

  • Deleted i_PADPoint(6,40), i_PODFixedPos(6,40) and replaced with the following: i_campaign(2), i_spare40, i_cycTrk, i_localSolarTime, i_spare41(7), i_deltaEllip(40). i_beamCoelv(40), i_beamAzimuth(40), i_d2refTrk(40), i_SigBegOff(40), i_DEM_hires_src(40), i_DEMhiresArElv (9,40), i_ElevBiasCorr i2b(40), i_spare42(5,40)
  • Removed i_bs_conf, i_bs_erd; replaced with i_spare11(3)
  • Moved (see above) i_SigBegOff(40); Replaced with i_spare47(40)
  • Renamed i_reflctUncorr to i_reflctUC
  • Changed i_erd, i_rdu to i_spare16(4)
  • Removed i_atmQF; replaced with spare
  • Removed i_beam_coelev, i_beam_azimuth; Replaced with i_spare15(8)
  • Deleted i_DEM_hires_src , i_DEM_hires_elv; Replaced with i_spare44(120)
  • Removed i_FRir_ODflg; replaced with i_atm_char_flag, i_atm_char_conf, spare48

GLA07-GLA08

  • No changes

GLA09

  • Added i_atm_char_flag, i_atm_char_conf; resized i_spare4(418)

GLA10

  • No changes

GLA11

  • Removed i_Aer_ir_ODFlg, i_cld_ir_ODFlg, i_FRir_ODFlg; replaced with i_spare6
  • Added i_aer4_sval1, i_aer4_sval_ratio, i_aer4_aod_ratio, i_aer4_sval_uf, i_spare5, i_reflCor_atm; Resized i_spare4

GLA12

  • Deleted i_PADPoint(6,40), i_PODFixedPos(6,40) and replaced with the following: i_campaign(2), i_spare40, i_cycTrk, i_localSolarTime, i_spare41(7), i_deltaEllip(40), i_beamCoelv(40), i_beamAzimuth(40), i_d2refTrk(40), i_SigBegOff(40), i_DEM_hires_src(40), i_DEMhiresArElv (9,40), i_ElevBiasCorr i2b(40), i_spare42(5,40)
  • Removed i_bs_conf, i_bs_erd; replaced with i_spare11(3)
  • Renamed i_reflctUncorr to i_reflctUC
  • Changed i_erd, i_rdu to i_spare16(4)
  • Removed i_atmQF; replaced with spare
  • Removed i_beam_coelev, i_beam_azimuth; Replaced with i_spare15(8)
  • Deleted i_DEM_hires_src , i_DEM_hires_elv; Replaced with i_spare44(120)
  • Removed i_FRir_ODflg; replaced with i_atm_char_flag, i_atm_char_conf, spare48

GLA13

  • Deleted i_PADPoint(6,40), i_PODFixedPos(6,40) and replaced with the following: i_campaign(2), i_spare40, i_cycTrk, i_localSolarTime, i_spare41(7), i_deltaEllip(40), i_beamCoelv(40), i_beamAzimuth(40), i_d2refTrk(40), i_SigBegOff(40), i_DEM_hires_src(40), i_DEMhiresArElv (9,40), i_ElevBiasCorr i2b(40), i_spare42(5,40)
  • Removed i_bs_conf, i_bs_erd; replaced with i_spare11(3)
  • Renamed i_reflctUncorr to i_reflctUC
  • Added i_kurt2, deleted i_spare11
  • Changed i_erd, i_rdu to i_spare16(4)
  • Removed i_atmQF; replaced with spare
  • Removed i_beam_coelev, i_beam_azimuth; Replaced with i_spare15(8)
  • Deleted i_DEM_hires_src , i_DEM_hires_elv; Replaced with i_spare44(120)
  • Removed i_FRir_ODflg; replaced with i_atm_char_flag, i_atm_char_conf, spare48

GLA14

  • Deleted i_PADPoint(6,40), i_PODFixedPos(6,40) and replaced with the following: i_campaign(2), i_spare40, i_cycTrk, i_localSolarTime, i_spare41(7), i_deltaEllip(40), i_beamCoelv(40), i_beamAzimuth(40), i_d2refTrk(40), i_SigBegOff(40), i_DEM_hires_src(40), i_DEMhiresArElv (9,40), i_ElevBiasCorr i2b(40), i_spare42(5,40)
  • Removed i_bs_conf, i_bs_erd; replaced with i_spare11(3)
  • Removed i_SigBegOff; replaced with spare47
  • Renamed i_reflctUncorr to i_reflctUC
  • Changed i_erd, i_rdu to i_spare16(4)
  • Removed i_atmQF; replaced with spare
  • Removed i_beam_coelev, i_beam_azimuth; Replaced with i_spare15(8)
  • Deleted i_DEM_hires_src , i_DEM_hires_elv; Replaced with i_spare44(120)
  • Removed i_FRir_ODflg; replaced with i_atm_char_flag, i_atm_char_conf, spare48

GLA15

  • Deleted i_PADPoint(6,40), i_PODFixedPos(6,40) and replaced with the following: i_campaign(2), i_spare40, i_cycTrk, i_localSolarTime, i_spare41(7), i_deltaEllip(40) i_beamCoelv(40), i_beamAzimuth(40), i_d2refTrk(40), i_SigBegOff(40), i_spare45, i_spare46, i_ElevBiasCorr i2b(40), i_spare42(5,40)
  • Added i_bathyElv, replaced i_spare12
  • Renamed i_reflctUncorr to i_reflctUC
  • Changed i_erd, i_rdu to i_spare16(4)
  • Removed i_atmQF; replaced with spare
  • Removed i_beam_coelev, i_beam_azimuth; Replaced with i_spare15(8)
  • Added i_kurt2; replaced i_spare13
  • Removed i_FRir_ODflg; replaced with i_atm_char_flag, i_atm_char_conf, spare48
  • Resized i_spare7; replaced with i_spare2, i_gASP