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GLAH12 Product Data Dictionary

File-Level (Global) Attributes

Attribute Example Value
featureType timeSeries
ShortName GLAH12
title GLAS/ICESat L2 Global Antarctic and Greenland Ice Sheet Altimetry Data (HDF5)
comment GLAH12 contains the ice sheet elevation and elevation distribution corrected for geodetic and atmospheric effects calculated from algorithms fine-tuned for ice sheet returns. Data granules contain 14 orbits of data within the ice sheet mask.
summary GLAH12 contains ice sheet elevation and elevation distribution calculated from algorithms fine-tuned for ice sheet returns for use by researchers. Parameters are at the full 40Hz resolution that fall within the ICESat ice sheet mask. Each GLAH12 file was created from an equivalent GLA12 binary file. The data used to create the GLAH12 values are contained in the equivalent GLAHxx files for the GLAxx files. See the provenance metadata for the creation of the GLA12.
license http://nsidc.org/data/icesat/disclaimer.html
references http://nsidc.org/data/docs/daac/glas_icesat_l1_l2_global_altimetry.gd.html (Guide Document for this product at NSIDC), http://nsidc.org/daac/icesat/index.html (GLAS Product page at NSIDC)
AccessConstraints Data may not be reproduced or distributed without including the CitationForExternalPublication for this product included in this Metadata. Data may not be distributed in an altered form without the written permission of the GLAS Science Team.
CitationforExternalPublication The data used in this study were produced by the GLAS Science Team at the ICESat Science Investigator-led Processing System (I-SIPS) at NASA/GSFC. The data archive site is the NSIDC DAAC.
contributor_role Data Originator, Investigator, Producer, Producer
contributor_name David W. Hancock (David.W.Hancock@nasa.gov), Bob E Schutz (schutz@utcsr.ae.utexas.edu), Jay Zwally (Jay.Zwally@nasa.gov), John P DiMarzio (John.P.Dimarzio.1@nasa.gov)
creator_name ICESat Science Investigator-led Processing System (I-SIPS)
creator_email David.W.Hancock@nasa.gov
publisher_name NSIDC User Services
publisher_email nsidc@nsidc.org
publisher_url http://nsidc.org/daac/icesat/index.html
platform Ice, Cloud, and Land Elevation Satellite (ICESat)
instrument Geoscience Laser Altimeter System (GLAS)
processing_level 2
date_created 2013-01-16T18:58:01
spatial_coverage_type Horizontal
history 2011-09-17T02:59:51 glas_alt 6.0.1 GLA12_633_2123_002_0141_0_01_0001.DAT, 2013-01-16T18:58:01.000000Z GLA12_h5_convert Version 1.2 (January 2013) ./GLAH12_633_2123_002_0141_0_01_0001.H5
geospatial_lat_min -90.0
geospatial_lat_max 90.0
geospatial_lon_min -180.0
geospatial_lon_max 180.0
geospatial_lat_units degrees_north
geospatial_lon_units degrees_east
keywords Earth Science > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation > Laser Reflectance, Earth Science > Hydrosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation, Earth Science > Land Surface > Topography > Terrain Elevation, Earth Science > Cryosphere > Sea Ice > Reflectance > Laser Reflectance, Earth Science > Oceans > Sea Ice > Reflectance > Laser Reflectance
keywords_vocabulary GCMD Science Keywords Version 6.0
standard_vocabulary_name CF-1.6
naming_authority http://dx.doi.org
project Ice, Cloud, and Land Elevation Satellite (GLAS_HDF)
time_type UTC
date_type J2000
time_coverage_start 2008-03-03T02:51:46
time_coverage_end 2008-03-04T01:24:53
time_coverage_duration 81280
source Satellite Measurements
HDFVersion HDF5 1.8.9
identifier_file_uuid 599740C3-F062-4F49-A756-8A0DA37BC95B
identifier_product_doi 10.5067/ICESAT/GLAS/DATA205
identifier_product_type GLAH12
identifier_product_format_version 1.0
Conventions CF-1.6
institution National Aeronautics and Space Administration (NASA)


Group: /Data_1HZ

This group contain data with a rate of 1HZ. 1Hz data may be indexed to the 40HZ data using the i_rec_ndx parameter in each respective time group.

Dimension Scales

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
DS_UTCTime_1 DOUBLE
(UNLIMITED)
Transmit Time of First Shot in frame in J2000
(time)
seconds since 2000-01-01 12:00:00 UTC The transmit time of the first shot in the 1 second frame measured as UTC seconds elapsed since Jan 1 2000 12:00:00 UTC. This time has been derived from the GPS time accounting for leap seconds. Rel 33 GLAS Binary Data NOT_SET

Group: Data_1HZ/Time

This group contains the 1HZ index and time-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
i_rec_ndx INTEGER
(UNLIMITED)
GLAS Record Index
(NOT_SET)
NOT_SET Unique index that relates this record to the corresponding record(s) in each GLAS data product. Rel 33 GLAS Binary Data DS_UTCTime_1
i_shot_count INTEGER
(UNLIMITED)
GLAS shot counter
(NOT_SET)
NOT_SET Identifies each laser shot within a record index. A combination of i_rec_ndx and i_shot_count can be used to uniquely identify each GLAS laser shot. Rel 33 GLAS Binary Data DS_UTCTime_1
d_transtime DOUBLE
(UNLIMITED)
One way transit time
(NOT_SET)
seconds One way transit time calculated using the preliminary range offset. This is added to the UTC time tag to get the ground bounce times at which to calculate the orbit. Rel 33 GLAS Binary Data DS_UTCTime_1
d_deltagpstmcor DOUBLE
(UNLIMITED)
Delta GPS time correction
(NOT_SET)
seconds The high frequency delta GPS time correction calculated during the precision orbit processing step. Rel 33 GLAS Binary Data DS_UTCTime_1
shot_time_flg INTEGER_1
(UNLIMITED)
time correction flag
(NOT_SET)
NOT_SET Shot time flag; Indicates what shot time is used.

flag values flag_meanings
0, 1 transmit_time ground_bounce_time
Rel 33 GLAS Binary Data DS_UTCTime_1
gps_time_flg INTEGER_1
(UNLIMITED)
time correction flag
(NOT_SET)
NOT_SET GPS time flag; Indicates if delta gps time correction is applied to shot time.

flag values flag_meanings
0, 1 not_applied applied
Rel 33 GLAS Binary Data DS_UTCTime_1
pl_timing_flg INTEGER_1
(UNLIMITED)
time correction flag
(NOT_SET)
NOT_SET Post-launch timing; indicates if post-launch timing bias is applied. Data value is stored in the Metadata group.

flag values flag_meanings
0, 1 not_applied applied
Rel 33 GLAS Binary Data DS_UTCTime_1
ddelay_flg INTEGER_1
(UNLIMITED)
time correction flag
(NOT_SET)
NOT_SET Digitizer turn-on delay flag; Indicates if digitizer turn-on delay is accounted for in shot time. Data value is stored in the Metadata group.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
peaktp_flg INTEGER_1
(UNLIMITED)
time correction flag
(NOT_SET)
NOT_SET Peak of transmit pulse flag; Indicates if time to peak of transmit pulse is accounted for in shot time.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1

Group: Data_1HZ/Geolocation

This group contains geolocation-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_lat DOUBLE
(UNLIMITED)
Spot 1 Coordinate Data, Latitude Corrected
(latitude)
degrees_north The geodetic latitude of the laser spot computed from the Precision orbit, precision attitude, and ice-sheet specific range after instrument corrections, atmospheric delays and tides have been applied. The values are in degrees north. Rel 33 GLAS Binary Data DS_UTCTime_1
d_lon DOUBLE
(UNLIMITED)
Spot 1 Coordinate Data, Longitude Corrected
(longitude)
degrees_east The longitude of the laser spot computed from the Precision orbit, precision attitude, and ice-sheet specific range after instrument corrections, atmospheric delays and tides have been applied. The values are in degrees east. Rel 33 GLAS Binary Data DS_UTCTime_1
i_track INTEGER
(UNLIMITED)
Track
(NOT_SET)
NOT_SET The track number. Rel 33 GLAS Binary Data DS_UTCTime_1

Group: Data_1HZ/Packet_data

This group contains flags indicating packet availability.

Group: Data_1HZ/Quality

This group contains quaility-related parameters and flags.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
orbit_pred_flg INTEGER_1
(UNLIMITED)
POD flag (Orbit Flag)
(NOT_SET)
NOT_SET Predicted or precision orbit flag

flag values flag_meanings
0, 1, 2 precision_orbit_used predicted_orbit_used onboard_orbit_used
Rel 33 GLAS Binary Data DS_UTCTime_1
orbit_man_flg INTEGER_1
(UNLIMITED)
POD flag (Orbit Flag)
(NOT_SET)
NOT_SET Maneuver flag. If maneuvers occurred orbit is considered degraded.

flag values flag_meanings
0, 1 no_maneuvers maneuvers_occurred_during_this_record
Rel 33 GLAS Binary Data DS_UTCTime_1
orbit_model_flg INTEGER_1
(UNLIMITED)
POD flag (Orbit Flag)
(NOT_SET)
NOT_SET Model problems flag. model_problems indicated when orbit RMS > 5 cm; indicates required accuracy not met.

flag values flag_meanings
0, 1 no_model_problems model_problems
Rel 33 GLAS Binary Data DS_UTCTime_1
orbit_att_flg INTEGER_1
(UNLIMITED)
POD flag (Orbit Flag)
(NOT_SET)
NOT_SET Attitude flag; modeled_attitude_used indicates possible orbit degradation.

flag values flag_meanings
0, 1 instrument_attitude_used_for_orbit modeled_attitude_used
Rel 33 GLAS Binary Data DS_UTCTime_1
orbit_array_flg INTEGER_1
(UNLIMITED)
POD flag (Orbit Flag)
(NOT_SET)
NOT_SET Solar ray orientation flag; modeled_solar_ray_orientation indicates possible orbit degradation.

flag values flag_meanings
0, 1 solar_ray_orientation_used_from measurement modeled_solar_ray_orientation
Rel 33 GLAS Binary Data DS_UTCTime_1
orbit_gps_flg INTEGER_1
(UNLIMITED)
POD flag (Orbit Flag)
(NOT_SET)
NOT_SET GPS flag; GPS_data_missing indicates GPS data missing from portion of this record and possible degradation.

flag values flag_meanings
0, 1 no_GPS_data_outage GPS_data_missing
Rel 33 GLAS Binary Data DS_UTCTime_1
att_offnadir_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET Off-nadir angle flag; Indicates if off-nadir angle is within limits.

flag values flag_meanings
0, 1 within_limit outside_limits
Rel 33 GLAS Binary Data DS_UTCTime_1
att_oceansw_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET Ocean sweep flag; Indicates if an ocean sweep is within the time frame of this record.

flag values flag_meanings
0, 1 not_ocean_sweep ocean_sweep
Rel 33 GLAS Binary Data DS_UTCTime_1
att_pointing_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET Target of opportunity off-pointing flag; Indicates if this record is within time of target of opportunity off-pointing.

flag values flag_meanings
0, 1 not_pointing pointing
Rel 33 GLAS Binary Data DS_UTCTime_1
att_steering_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET Steering to reference track flag; Indicates if this record is within target of opportunity off-pointing.

flag values flag_meanings
0, 1 not_pointing pointing
Rel 33 GLAS Binary Data DS_UTCTime_1
att_actual_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET Actual data bits flag; Indicates if the first 3 Attitide Flags have been set based on actual data, if ignore, then IGNORE those bits.

flag values flag_meanings
0, 1 actual ignore
Rel 33 GLAS Binary Data DS_UTCTime_1
att_ist_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET IST data flag; Indicates if IST data are good, missing for at least a portion of the time of this frame, noisy for at least a portion of the time of this frame or noisy and missing for at least a portion of the time of this frame.

flag values flag_meanings
0, 1, 2, 3 good missing noisy missing_noisy
Rel 33 GLAS Binary Data DS_UTCTime_1
att_gyro_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET GYRO data flag; Indicates if GYRO data are good, missing for at least a portion of the time of this frame, noisy for at least a portion of the time of this frame or noisy and missing for at least a portion of the time of this frame.

flag values flag_meanings
0, 1, 2, 3 good missing noisy missing_noisy
Rel 33 GLAS Binary Data DS_UTCTime_1
att_lrs_flg INTEGER_1
(UNLIMITED)
Attitude Flag 1
(NOT_SET)
NOT_SET LRS Data flag; Indicates the following conditions: LRS data good, consists of star, laser and CRS; LRS data good, but no star data for at least a portion of this frame; LRS data good, but no laser data for at least a portion of this frame; LRS data good, but no CRS data for at least a portion of this frame; LRS data good, but only CRS data for at least a portion of this frame; LRS data good, but only laser data for at least a portion of this frame; LRS data good, but only star data for at least a portion of this frame; Missing LRS for at least a portion of the time of this frame.

flag values flag_meanings
0, 1, 2, 3, 4, 5, 6, 7 good no_star no_laser no_crs only_crs only_laser only_star missing_lrs
Rel 33 GLAS Binary Data DS_UTCTime_1
altfrm_corr_flg INTEGER_1
(UNLIMITED)
Altimeter Frame Quality Flag
(NOT_SET)
NOT_SET Corrections flag; Indicates if all data in frame are good with appropriate corrections applied; or if some of data are not corrected or have measurement problems.

flag values flag_meanings
0, 1 good uncorrected
Rel 33 GLAS Binary Data DS_UTCTime_1
altfrm_data_flg INTEGER_1
(UNLIMITED)
Altimeter Frame Quality Flag
(NOT_SET)
NOT_SET Frame data flag; Indicates if there are at least some usable data in the frame; or if all elevations in the frame are bad due to problems with corrections.

flag values flag_meanings
0, 1 good not_good
Rel 33 GLAS Binary Data DS_UTCTime_1
altfrm_meas_flg INTEGER_1
(UNLIMITED)
Altimeter Frame Quality Flag
(NOT_SET)
NOT_SET Measurements flag; Indicates if all GLAS measurements are good or if there is at least one unusable measurement in the frame.

flag values flag_meanings
0, 1 good not_good
Rel 33 GLAS Binary Data DS_UTCTime_1
altfrm_use_flg INTEGER_1
(UNLIMITED)
Altimeter Frame Quality Flag
(NOT_SET)
NOT_SET Usable Measurements flag; Indicates if there is at least one usable measurement in the frame; or if all GLAS measurements are bad.

flag values flag_meanings
0, 1 usable not_usable
Rel 33 GLAS Binary Data DS_UTCTime_1

Group: Data_1HZ/Transmit_Energy

This group contains information relating to transmit energy.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_tpazimuth_avg DOUBLE
(UNLIMITED)
Transmit Pulse azimuth - frame avg
(NOT_SET)
degrees Transmit pulse azimuth as measured by the LPA. Averaged over the 1-second frame. From ANC09. Rel 33 GLAS Binary Data DS_UTCTime_1
d_tpeccentricity_avg DOUBLE
(UNLIMITED)
Transmit Pulse eccentricity - frame avg
(NOT_SET)
NOT_SET Transmit pulse eccentricity as measured by the LPA. Averaged over the 1-second frame. From ANC09. Rel 33 GLAS Binary Data DS_UTCTime_1
d_tpmajoraxis_avg DOUBLE
(UNLIMITED)
Transmit Pulse major axis - frame avg
(NOT_SET)
meters Transmit pulse major axis as measured by the LPA. Averaged over the 1-second time frame. From ANC09. Rel 33 GLAS Binary Data DS_UTCTime_1
d_tpintensity_avg DOUBLE
(UNLIMITED)
Transmit Pulse intensity - frame avg
(NOT_SET)
count Transmit pulse intensity as measured by the LPA. Averaged over the 1-second time frame. From ANC09. Rel 33 GLAS Binary Data DS_UTCTime_1

Group: Data_1HZ/Reflectivity

This group contains reflectivity information.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_localSolarTime DOUBLE
(UNLIMITED)
Local apparent solar time
(NOT_SET)
seconds Local apparent solar time. Rel 33 GLAS Binary Data DS_UTCTime_1
d_Azimuth DOUBLE
(UNLIMITED)
Local Azimuth
(solar_azimuth_angle)
degrees Mean azimuth measured clockwise from north based on latitude, longitude, and elevation of a 1 second interval of the trace of the ground footprint-center. Rel 33 GLAS Binary Data DS_UTCTime_1
d_SolAng DOUBLE
(UNLIMITED)
Solar Angle
(NOT_SET)
degrees Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low-precision value, with approximately one degree accuracy. Rel 33 GLAS Binary Data DS_UTCTime_1
d_reflCor_atm DOUBLE
(UNLIMITED)
Reflectivity Correction Factor For Atmospheric Effects
(NOT_SET)
NOT_SET This reflectance correction factor is calculated as 1 / e^(-2(tc+ta+tp+tm)), where tc is the cloud (column) integrated optical depth, ta is the aerosol (column) integrated optical depth, tp is the planetary boundary layer optical depth, and tm is the molecular optical depth. tm is a constant equal to -log(gd_T_RTatm)/2, where gd_T_RTatm = 0.98 is defined in const_elev_mod.f90 or read from ANC07-03. The attenuation correction factor has been corrected for multiple scattering. The reflectance has been corrected for waveform saturation. Rel 33 GLAS Binary Data DS_UTCTime_1

Group: Data_1HZ/Elevation_Flags

This group contains flags indicating the quality or suitability of elevation data.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
surf_ld_flg INTEGER_1
(UNLIMITED)
Region Type
(NOT_SET)
NOT_SET Region type flag; indicates presence of land.

flag values flag_meanings
0, 1 no_land land
Rel 33 GLAS Binary Data DS_UTCTime_1
surf_si_flg INTEGER_1
(UNLIMITED)
Region Type
(NOT_SET)
NOT_SET Region type Sea Ice flag; indicates presence of sea ice.

flag values flag_meanings
0, 1 no_sea_ice sea_ice
Rel 33 GLAS Binary Data DS_UTCTime_1
surf_oc_flg INTEGER_1
(UNLIMITED)
Region Type
(NOT_SET)
NOT_SET Region type ocean flag; indicates presense of ocean.

flag values flag_meanings
0, 1 no_ocean ocean
Rel 33 GLAS Binary Data DS_UTCTime_1
surf_is_flg INTEGER_1
(UNLIMITED)
Region Type
(NOT_SET)
NOT_SET Region type Ice Sheet flag; indicates presense of ice sheet.

flag values flag_meanings
0, 1 no_ice_sheet ice_sheet
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_ldtide_flg INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Load tides flag; Indicates if a correction for the dynamic effect of load tides has been applied to the range before the elevation was calculated.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_octide_flg INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Ocean tides flag; Indicates if a correction for the dynamic effect of ocean tides has been applied to the range before the elevation was calculated.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_setide_flag INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Solid earth tides flag; Indicates if a correction for the dynamic effect of solid earth tides has been applied to the range before the elevation was calculated.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_drytrop_flg INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Dry troposphere flag; Indicates if a correction for propagation errors due to the dry troposphere was applied to the range before the elevation was calculated.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_wettrop_flg INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Wet troposphere flag Indicates if a correction for propagation errors due to the wet troposphere was applied to the range before the elevation was calculated.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_intbias_flg INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Internal range bias flag; Indicates if the internal range bias was applied to the range before the elevation was calculated and if the value of d_refRng on the record has this correction applied.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_plbias_flg INTEGER_1
(UNLIMITED)
Range Correction Flag
(NOT_SET)
NOT_SET Post-launch range bias flag; Indicates if the post-launch range bias was applied to the range before the elevation was calculated and if the value of d_refRng on the record has this correction applied.

flag values flag_meanings
0, 1 applied not_applied
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_model_flg INTEGER_1
(UNLIMITED)
Correction Status Flag
(NOT_SET)
NOT_SET Geophysical corrections flag; Indicates if the load and ocean tides are from global model, regional model no. 1, regional model no. 2, or regional model no. 3.

flag values flag_meanings
0, 1, 2, 3 global model_1 model_2 model_3
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_oldmet_flg INTEGER_1
(UNLIMITED)
Correction Status Flag
(NOT_SET)
NOT_SET Geophysicat corrections flag; Indicates if troposphere corrections are based on 6hr NCEP grids surrounding data, 6hr NCEP grids but at least one was >6 but <24 hrs away from data, standard atm, or reanalyzed met data.

flag values flag_meanings
0, 1, 2, 3 6_hour over_6_hour standard_atm reanalyzed
Rel 33 GLAS Binary Data DS_UTCTime_1
rng_atmcorr_flg INTEGER_1
(UNLIMITED)
Correction Status Flag
(NOT_SET)
NOT_SET Geophysical corrections flag; Indicates values used to calculate corrected reflectivity - computed aerosol and cloud optical depths used, default-null aerosol and computed cloud optical depths, computed aerosol and default-null cloud optical depths, default-null values for aerosol and cloud optical depths, or if maximum bound set.

flag values flag_meanings
0, 1, 2, 3, 4 computed only_od only_aerosol defaults max_bound_set
Rel 33 GLAS Binary Data DS_UTCTime_1

Group: Data_1HZ/Atmosphere

This group contains the 1 hz information relating to the atmosphere.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
atm_gla11_flg INTEGER_1
(UNLIMITED)
Atmosphere Availability Flag
(NOT_SET)
NOT_SET GLA11 data availability flag

flag values flag_meanings
0, 1 available not_available
Rel 33 GLAS Binary Data DS_UTCTime_1
atm_gla09_flg INTEGER_1
(UNLIMITED)
Atmosphere Availability Flag
(NOT_SET)
NOT_SET GLA09 data availability flag

flag values flag_meanings
0, 1 available not_available
Rel 33 GLAS Binary Data DS_UTCTime_1
atm_char_flag INTEGER_1
(UNLIMITED)
Atmosphere Characterization Flag
(NOT_SET)
NOT_SET Flag to characterize cloud and blowing snow state of the atmosphere based on combinations of hi_cloud (> 5 km), mid_cloud (>2, <=5 km), low cloud (> 500 m, <=2 km), blowing snow or fog and hi/lo optical depth. Additional values indicate if the characterization was not tested or if the data quality was insufficient to assign a flag.

flag values flag_meanings
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 clear hi_cloud_low_od hi_cloud_high_od mid_cloud_low_od mid_cloud_hi_od low_cloud_low_od low_cloud_hi_od blowing_snow_low_od blowing_snow_hi_od not_tested insufficient
Rel 33 GLAS Binary Data DS_UTCTime_1
atm_char_conf INTEGER_1
(UNLIMITED)
Atmosphere Characterization Flag Confidence
(NOT_SET)
NOT_SET Confidence level ascribed to the atmosphere characterization flag. 0=not applicable (for contamination flag values of 9 or 10). 1: low confidence. 2: reasonable confidence. 3: high confidence.

flag values flag_meanings
0, 1, 2, 3 not_applicable low_confidence reasonable_confidence high_confidence
Rel 33 GLAS Binary Data DS_UTCTime_1
cld1_mswf_flg INTEGER_1
(UNLIMITED)
Cloud Multiple Scattering Warning Flag
(NOT_SET)
NOT_SET The multiple scattering warning flag (MSWF) is based on the total column optical depth (aerosol plus cloud) calculated in GLA11 using 532nm. It is intended as a way to quickly obtain information about the potential severity of multiple scattering with regards to the range-to-surface calculated by the altimetry processing software. The multiple scattering warning flag will have values ranging from 0-14, based on the total column optical depth. A warning flag value of 15 will signify invalid. An invalid will be encoded if an optical depth in any of the layers in the 1-second column could not be calculated. This usually occurs in a very optically thick cloud which extinguishes the signal. It could also occur if the extinction-to-backscatter ratio assignment is set too high, causing the transmission calculations in the lidar inversion to go out-of-range.

flag values flag_meanings
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 under_0.010 0.010_0.030 0.030_0.060 0.060_0.100 0.100_0.150 0.150_0.225 0.225_0.300 0.300_0.400 0.400_0.500 0.500_0.670 0.670_0.900 0.900_1.200 1.200_1.600 1.600_2.000 over_2.000 invalid
Rel 33 GLAS Binary Data DS_UTCTime_1
MRC_af_flg INTEGER_1
(UNLIMITED)
Medium Resolution Cloud Availability Flag
(NOT_SET)
NOT_SET Indicates number of cloud layers at medium resolution from the 532 nm channel; not_searched = cloud layers were not searched for; not_detected = cloud layers were searched for, but not detected.

flag values flag_meanings
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 not_searched 1 2 3 4 5 6 7 8 9 10 11 12 13 14 not_detected
Rel 33 GLAS Binary Data DS_UTCTime_1
d_Surface_pres DOUBLE
(UNLIMITED)
Surface Pressure
(surface_temperature)
hPa Atmospheric pressure at Earth's surface level measured in hPa and derived from the meteorological data files. Rel 33 GLAS Binary Data DS_UTCTime_1
d_Surface_relh DOUBLE
(UNLIMITED)
Relative Humidity
(surface_air_pressure)
percent Atmospheric relative humidity at Earth's surface level measured as a percentage and derived from the meteorological data files. Rel 33 GLAS Binary Data DS_UTCTime_1
d_Surface_temp DOUBLE
(UNLIMITED)
Surface Temperature
(relative_humidity)
degree Celsius Atmospheric temperature at Earth's surface level measured in degrees Celcius and derived from the meteorological data files. Rel 33 GLAS Binary Data DS_UTCTime_1


Group: /Data_40HZ/

This group contains data with a rate of 40HZ. 40Hz data may be indexed to the 1HZ data using the i_rec_ndx parameter in each respective time group.

Dimension Scales

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
DS_UTCTime_40 DOUBLE
(UNLIMITED)
Transmit time of each shot in J2000 seconds
(time)
seconds since 2000-01-01 12:00:00 UTC The transmit time of each shot in the 1 second frame measured as UTC seconds elapsed since Jan 1 2000 12:00:00 UTC. This time has been derived from the GPS time accounting for leap seconds. Rel 33 GLAS Binary Data NOT_SET
DS_DEMhiresArElv INTEGER
(UNLIMITED)
Location index for D_DEMhiresArElv
(NOT_SET)
NOT_SET This array indicates the relative position of each d_DEMhiresArElv measurement. Direction is relative to the spot and indicated in cardinal points. The position of the spot is indicated as ORIGIN.

flag values flag_meanings
1, 2, 3, 4, 5, 6, 7, 8, 9 NW N NE W ORIGIN E SW S SE
Constants NOT_SET

Group: Data_40HZ/Time

This group contains the 40HZ index and time-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
i_rec_ndx INTEGER
(UNLIMITED)
GLAS Record Index
(NOT_SET)
NOT_SET Unique index that relates this record to the corresponding record(s) in each GLAS data product. Rel 33 GLAS Binary Data DS_UTCTime_40
i_shot_count INTEGER
(UNLIMITED)
GLAS shot counter
(NOT_SET)
NOT_SET Identifies each laser shot within a record index. A combination of i_rec_ndx and i_shot_count can be used to uniquely identify each GLAS laser shot. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Quality

This group contains quaility-related parameters and flags.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
rng_uqf_sigbeg1_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Signal begin range increment flag (standard).

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_sigend1_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Signal end range increment flag (standard).

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_thres1_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Threshold retracker range increment flag (standard).

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_cent1_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Centroid retracker range increment (standard).

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_sigbeg2_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Signal begin range increment flag (alternate)

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_sigend2_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Signal end range increment flag (alternate)

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_thres2_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Threshold retracker range increment flag (alternate)

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_cent2_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Centroid retracker range increment flag (alternate)

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_is_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Ice sheet range increment flag.

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_si_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Sea ice range increment flag.

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_ld_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Land range increment flag.

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
rng_uqf_oc_flg INTEGER_1
(UNLIMITED)
Range Offset Quality/Use Flag
(NOT_SET)
NOT_SET Ocean range increment flag.

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
sat_corr_flg INTEGER_1
(UNLIMITED)
Saturation Correction Flag
(NOT_SET)
NOT_SET Saturation Correction Flag; Indicates if the saturation is Not Saturated (i_satNdx<2) or No Signal; Inconsequential (i_satNdx>=2 & i_pctSat<2.0); is Applicable (i_satNdx>=2 & i_pctSat>=2.0 & Full Width*<100ns); is Not Computable; is Not Applicable (i_satNdx>=2 & i_pctSat>=2.0 & Full Width*>=100ns).

flag values flag_meanings
0, 1, 2, 3, 4, 5 not_saturated inconsequential applicable not_computed not_applicable
Rel 33 GLAS Binary Data DS_UTCTime_40
elev_use_flg INTEGER_1
(UNLIMITED)
Elevation use flag
(NOT_SET)
NOT_SET Flag indicating whether the elevations on this record should be used.

flag values flag_meanings
0, 1 valid not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
att_pad_use_flg INTEGER_1
(UNLIMITED)
Pad Use Flag
(NOT_SET)
NOT_SET PAD Use Flag: Indicates if PAD used to determine spot location.

flag values flag_meanings
0, 1 used not_used
Rel 33 GLAS Binary Data DS_UTCTime_40
att_calc_pad_flg INTEGER_1
(UNLIMITED)
Calc Pad Use Flag
(NOT_SET)
NOT_SET Calc PAD Use Flag; Indicates if new PAD or pass-thru PAD was used to determine orbit.

flag values flag_meanings
0, 1 new pass_thru
Rel 33 GLAS Binary Data DS_UTCTime_40
att_lpa_flg INTEGER_1
(UNLIMITED)
LPA Problem Flag
(NOT_SET)
NOT_SET LPA Problem Flag; Indicates if LPA is good, missing or noisy.

flag values flag_meanings
0, 1, 2 good missing noisy
Rel 33 GLAS Binary Data DS_UTCTime_40
sigma_att_flg INTEGER_1
(UNLIMITED)
Attitude Quality Indicator
(NOT_SET)
NOT_SET Attitude quality indicator flag.

flag values flag_meanings
0, 50, 100, 127 good warning bad not_valid
Rel 33 GLAS Binary Data DS_UTCTime_40
i_satNdx INTEGER
(UNLIMITED)
Saturation Index
(NOT_SET)
ns The count of the number of gates in a waveform which have an amplitude greater than or equal to i_satNdxTh (set in anc07_0004). The value 126 means 126 or more gates are above the saturation index threshold (i_satNdxth). Rel 33 GLAS Binary Data DS_UTCTime_40
d_pctSAT DOUBLE
(UNLIMITED)
Percent Saturation
(NOT_SET)
percent Percent saturation (d_pctSAT) is calculated using the formula: d_pctSAT= 100*(saturation index)/ ( signal end - signal begin in nanoseconds). The alternate signal end/begin are used for GLA14 d_pctSAT, while the standard fit values are used for GLA06, 12, 13, and 15. The Saturation elevation correction is not applied in the geolocation processing computation of lat, lon and elev. Because the saturation corrections are small and data is acquired within 5 deg off nadir, effects on lat and lon can be ignored. To apply the saturation elevation correction to the elevations on the products it must be ADDED to the elevation estimates. Reported elevations for returns with invalid d_satElevCorr values and sat_corr_flg values of 3 or 4 are likely to have large, uncorrectable errors and should be excluded from analyses. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Geolocation

This group contains geolocation-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_lat DOUBLE
(UNLIMITED)
Coordinate Data, Latitude, specific to ice sheet range
(NOT_SET)
degrees_north The geodetic latitude of the laser spot computed from the Precision orbit, precision attitude, and ice-sheet specific range after instrument corrections, atmospheric delays and tides have been applied. The values are in degrees north. Rel 33 GLAS Binary Data DS_UTCTime_40
d_lon DOUBLE
(UNLIMITED)
Coordinate Data, Longitude, specific to ice sheet range
(NOT_SET)
degrees_east The longitude of the laser spot computed from the Precision orbit, precision attitude, and ice-sheet specific range after instrument corrections, atmospheric delays and tides have been applied. The values are in degrees east. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Elevation_Surfaces

This group contains the surface-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_elev DOUBLE
(UNLIMITED)
Surface Elevation
(height_above_reference_ellipsoid)
meters Surface elevation with respect to the ellipsoid at the spot location determined by the ice-sheet specific range after instrument corrections, atmospheric delays and tides have been applied. The saturation elevation correction (d_satElevCorr) has not been applied and needs to be added to this elevation. This can be over a one meter correction. If it is invalid then the elevation should not be used. The saturation correction flag (sat_corr_flg) is an important flag to understand the possible quality of the elevation data. The saturation index (i_satNdx) can be used for more understanding of concerns on data quality from saturation effects. Also no correction for pulse spreading from forward scatter has been applied. Rel 33 GLAS Binary Data DS_UTCTime_40
d_IceSVar DOUBLE
(UNLIMITED)
Standard Deviation of the ice sheet Gaussian Fit
(NOT_SET)
volts The standard deviation of the difference between the functional fit and the received echo using standard parameters. It is directly taken from GLA05 parameter d_wfFitSDev_2 (standard). Rel 33 GLAS Binary Data DS_UTCTime_40
d_refRng DOUBLE
(UNLIMITED)
Reference Range
(altimeter_range)
meters Range in distance calculated from the time between the centroid of the transmit pulse and the farthest gate from the spacecraft of the received pulse. See the rngcorrflg to determine any corrections that have been applied. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Elevation_Corrections

This group contains elevation-related corrections.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_dTrop DOUBLE
(UNLIMITED)
Range Correction, Dry Troposphere
(altimeter_range_correction_due_to_dry_troposphere)
meters The range correction due to the dry troposphere. Validity is based on results of finding a range with the standard fit. Rel 33 GLAS Binary Data DS_UTCTime_40
d_wTrop DOUBLE
(UNLIMITED)
Range Correction_Wet Troposphere
(altimeter_range_correction_due_to_wet_troposphere)
meters The range correction due to the wet troposphere. (See ATBDs) Rel 33 GLAS Binary Data DS_UTCTime_40
d_satElevCorr DOUBLE
(UNLIMITED)
Saturation Elevation Correction
(NOT_SET)
meters Correction to elevation for saturated waveforms. This correction has NOT been applied to the data. To apply it, SUBTRACT the correction from the range estimate. To apply the correction to the elevations it must be ADDED to the elevation estimates. Rel 33 GLAS Binary Data DS_UTCTime_40
d_ElevBiasCorr DOUBLE
(UNLIMITED)
Elevation Bias Correction
(NOT_SET)
meters Correction to elevation based on post flight analysis for biases determined for each campaign. This bias correction has not been applied to the data. To apply it SUBTRACT the correction from the range estimate. To apply the correction to the elevations it must be ADDED to the elevation estimates. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Elevation_Angles

This group contains pointing angle parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_beamCoelv DOUBLE
(UNLIMITED)
d_beamCoelv
(NOT_SET)
degrees Co-elevation (CE) is direction from vertical of the laser beam as seen by an observer located at the laser ground spot. Rel 33 GLAS Binary Data DS_UTCTime_40
d_beamAzimuth DOUBLE
(UNLIMITED)
d_beamAzimuth
(NOT_SET)
degrees The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Elevation_Offsets

The group contains elevation offsets. These offsets allow the elevation for the specific surface types to be derived.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_cntRngOff DOUBLE
(UNLIMITED)
Centroid Range Offset
(NOT_SET)
meters Offset to be added to d_refRng to give the range in distance to the location of the centroid of the received echo from signal begin through signal end defined by the standard parameters. Rel 33 GLAS Binary Data DS_UTCTime_40
d_IsRngFst DOUBLE
(UNLIMITED)
Ice Sheet Range Offset using first peak
(NOT_SET)
meters Range offset to be added to d_refRng to calculate ice sheet specific range from centroid of first peak in standard gaussian fit. Rel 33 GLAS Binary Data DS_UTCTime_40
d_IsRngLast DOUBLE
(UNLIMITED)
Ice Sheet Range offset using last peak
(NOT_SET)
meters Range offset to be added to d_refRng to calculate ice sheet specific range from centroid of last peak in standard gaussian fit. Rel 33 GLAS Binary Data DS_UTCTime_40
d_isRngOff DOUBLE
(UNLIMITED)
Ice Sheet Range Offset
(NOT_SET)
meters Range offset to be added to d_refRng to calculate the range using the algorithm deemed appropriate for ice sheets. Rel 33 GLAS Binary Data DS_UTCTime_40
d_SigBegOff DOUBLE
(UNLIMITED)
Signal Begin Range Offset
(NOT_SET)
meters Offset to be added to d_refRng to give the range in distance to the location of the received echo calculated at the beginning of signal (closest to the spacecraft) using standard parameters. Rel 33 GLAS Binary Data DS_UTCTime_40
d_SigEndOff DOUBLE
(UNLIMITED)
Signal End Range Offset
(NOT_SET)
meters Offset to be added to d_refRng to give the range in distance to the location of the received echo calculated at the end of signal (farthest from the spacecraft) using standard parameters. Rel 33 GLAS Binary Data DS_UTCTime_40
d_TrshRngOff DOUBLE
(UNLIMITED)
Threshold Retracker Range Offset
(NOT_SET)
meters Offset to be added to d_refRng to give the range in distance to the threshold retracker location of the received echo using standard parameters. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Elevation_Flags

This group contains flags related to the elevation estimates for each shot.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
elv_cnt_1_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Standard parameterization; true if centroid of received pulse between signal begin and signal end defined for standard parameterization used to calculate elevation.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_cnt_2_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Alternate parameterization;indicates if centroid of received pulse between signal begin and signal end defined for alternate parameterization used to calculate elevation.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_peak_1_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Standard parameterization;Indicates if location of last gaussian peak in received pulse for standard parameterization used to calculate elevation.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_peak_2_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Alternate parameterization;Indicates if location of last gaussian peak in received pulse for alternate parameterization used to calculate elevation.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_thres_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Threshold retracker; Indicates if Location of threshold retracker used to calculate elevation.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_gauss_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Gaussion; Indicates if location associated with gaussian with largest peak used to calculate elevation.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_other_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Other algorithm; Indicates if other algorithm used to calculate elevation - see software release documentation for details.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40
elv_cloud_flg INTEGER_1
(UNLIMITED)
Elevation Definition Flag
(NOT_SET)
NOT_SET Cloud contamination; Indicates if Gain > flag value, indicating probable cloud contamination.

flag values flag_meanings
0, 1 false true
Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Transmit_Energy

This group contains transmit energy parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_TxNrg DOUBLE
(UNLIMITED)
1064 nm Laser Transmit Energy
(NOT_SET)
joules The 1064 nm laser pulse transmitted energy in energy units, computed from the digitized outgoing pulse, and the transmit gain. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Geophysical

This group contains geophysical parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_d2refTrk DOUBLE
(UNLIMITED)
Distance to the reference ground track
(NOT_SET)
meters Distance to the reference ground track. Rel 33 GLAS Binary Data DS_UTCTime_40
d_DEM_elv DOUBLE
(UNLIMITED)
DEM Elevation
(NOT_SET)
meters Elevation at the footprint location from the SRTM30 (GTOPO30 + SRTM) Digital Elevation Model (DEM). The reference frame for the DEM elevation was changed to the TOPEX/Poseidon ellipsoid to make it consistent with the GLAS elevations. Rel 33 GLAS Binary Data DS_UTCTime_40
d_DEMhiresArElv DOUBLE
(UNLIMITED, 9)
DEMhiresArElv
(NOT_SET)
meters d_DEMhiresArElv is a 9 element array of high resolution DEM values. The array index corresponds to the position of the DEM value relative to the spot. (5) is the footprint center. Rel 33 GLAS Binary Data DS_UTCTime_40
d_eqElv DOUBLE
(UNLIMITED)
Equilibrium Tide Elevation
(sea_surface_height_amplitude_due_to_equilibrium_ocean_tide)
meters The equilibrium (long period) tide at last valid shot over the ocean. Rel 33 GLAS Binary Data DS_UTCTime_40
d_erElv DOUBLE
(UNLIMITED)
Solid Earth Tide Elevation
(NOT_SET)
meters The solid earth tide elevation. Rel 33 GLAS Binary Data DS_UTCTime_40
d_gdHt DOUBLE
(UNLIMITED)
Geoid
(geoid_height_above_reference_ellipsoid)
meters The height of the geoid above the ellipsoid. EGM2008 geoid height above the reference ellipsoid. Rel 33 GLAS Binary Data DS_UTCTime_40
d_ldElv DOUBLE
(UNLIMITED)
Load Tide Elevation
(NOT_SET)
meters The load tide elevation applied to each shot. Rel 33 GLAS Binary Data DS_UTCTime_40
d_ocElv DOUBLE
(UNLIMITED)
Ocean Tide Elevation
(sea_surface_height_amplitude_due_to_non_equilibrium_ocean_tide)
meters The ocean tide elevation from the TPX07.1 tide model. Rel 33 GLAS Binary Data DS_UTCTime_40
d_deltaEllip DOUBLE
(UNLIMITED)
Delta Ellipsoid
(NOT_SET)
meters Surface elevation (T/P ellipsoid) minus surface elevation (WGS84 ellipsoid). Rel 33 GLAS Binary Data DS_UTCTime_40
d_poTide DOUBLE
(UNLIMITED)
Pole Tide
(sea_surface_height_amplitude_due_to_pole_tide)
meters Pole tide: an ocean tide which is the result of the Chandler wobble (a free nutation of the Earth caused by fluctuating pressure on the bottom of the ocean, caused by temperature and salinity changes and wind-driven changes in the circulation of the oceans). Rel 33 GLAS Binary Data DS_UTCTime_40
i_DEM_hires_src_1 INTEGER_1
(UNLIMITED)
High Resolution Source Flag
(NOT_SET)
NOT_SET High resolution DEM source provider; Indicates if no high res source available, unfinished research Shuttle Radar Topography Mission (SRTM) C-band 90m DEM produced by JPL (+-1.1km E-W swath), finished' SRTM C-band 90 m DEM produced by NGA (+-2.1km E-W swath), ICESat Greenland V1 1km DEM, ICESat Antarctica V1 500m DEM, 90m Canadian Digital Elevation Data (CDED), 90m Canadian Digital Elevation Data (CDED) if available otherwise finished SRTM C-band 90 m DEM.

flag values flag_meanings
0, 1, 2, 3, 4, 5, 6 none pre_srtm srtm greenland antarctica cded_90 cded_srtm
Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Reflectivity

This group contains reflectivity parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_reflctUC DOUBLE
(UNLIMITED)
reflctUC
(NOT_SET)
NOT_SET Reflectivity, not corrected for atmospheric effects, is calculated as Refl = R/T, where R is the received energy after it has been scaled for range, and T is the transmitted energy. i_reflctUC has also been calibrated for gain non-linearity (only for non-saturated waveforms), ground truth calibration and boresight shift shadowing (BSS). It is not corrected for saturation effects. If the shot is saturated (satindex above 2) then to correct for saturation the reflectivity estimate needs to be multiplied by the ratio of the corrected energy to the uncorrected energy (sat corrected reflectivity = d_reflctUC * (d_RecNrgAll + d_satNrgCorr)/d_RecNrgAll). The atmospheric corrected reflectivity may be calculated from this uncorrected reflectivity by multiplying it by d_reflCor_atm. d_reflctUC is invalid where d_satNrgCorr is invalid. Rel 33 GLAS Binary Data DS_UTCTime_40
d_sDevNsOb1 DOUBLE
(UNLIMITED)
Standard deviation of 1064 nm Background noise, (alternate)
(NOT_SET)
volts The standard deviation of the background noise (alternate parameters). Rel 33 GLAS Binary Data DS_UTCTime_40
d_satNrgCorr DOUBLE
(UNLIMITED)
Saturation Energy Correction
(NOT_SET)
Joules Correction to energy for saturated waveforms. This correction has not been applied to the energy. It should be ADDED to any echo pulse energy calculated from the pulse area under the waveform. Also any reflectivity estimates need to be corrected for this error in energy measurement. Rel 33 GLAS Binary Data DS_UTCTime_40
d_RecNrgAll DOUBLE
(UNLIMITED)
Received Energy signal begin to signal end
(NOT_SET)
Joules This is calculated by taking the area under the received waveform (referenced to the observed noise) from all responses between the noise crossing before the first threshold crossing and the noise crossing after the last threshold crossing. It is a rescaled value from the GLA01 parameter d_recNrgAll_EU and is not recomputed. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Waveform

This group contains waveform-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_skew2 DOUBLE
(UNLIMITED)
Skewness
(NOT_SET)
NOT_SET The skewness of the received echo from signal begin to signal end using standard parameters. Rel 33 GLAS Binary Data DS_UTCTime_40
d_kurt2 DOUBLE
(UNLIMITED)
Kurtosis of the Received Echo (standard)
(NOT_SET)
NOT_SET Kurtosis of the received echo from signal begin to signal end using standard parameters Rel 33 GLAS Binary Data DS_UTCTime_40
d_maxRecAmp DOUBLE
(UNLIMITED)
Max Amplitude of Received Echo
(NOT_SET)
volts Maximum amplitude of the received echo. Rel 33 GLAS Binary Data DS_UTCTime_40
d_maxSmAmp DOUBLE
(UNLIMITED)
Peak Amplitude of Smoothed Received Echo
(NOT_SET)
volts The peak amplitude of the received echo after it has been smoothed to remove high frequency noise (see ATBD). Rel 33 GLAS Binary Data DS_UTCTime_40
i_numPk INTEGER
(UNLIMITED)
Number of Peaks found in the Return
(NOT_SET)
count The number of peaks in the return echo found by the gaussian fitting procedure, using standard parameters. Rel 33 GLAS Binary Data DS_UTCTime_40
i_gval_rcv INTEGER
(UNLIMITED)
Gain Value used for Received Pulse
(NOT_SET)
counts Gain value used for received pulse - uncalibrated. Rel 33 GLAS Binary Data DS_UTCTime_40

Group: Data_40HZ/Atmosphere

This group contains atmosphere-related parameters.

Label Datatype
(Dimensions)
long_name
(standard_name)
units description source coordinates
d_FRir_cldtop DOUBLE
(UNLIMITED)
Full Resolution 1064 Cloud Top
(NOT_SET)
meters Full resolution (40 Hz) cloud top height obtained from the 1064 atmospheric channel. This parameter is in GLA09. Rel 33 GLAS Binary Data DS_UTCTime_40
d_FRir_intsig DOUBLE
(UNLIMITED)
Full Resolution 1064 Integrated Signal
(NOT_SET)
1/(m-sr) Though called 'integrated signal' this is actually an average of all bins in the above-ground portion of the 1064 40 Hz profile with values above the threshold of 1.0e-7 (1/(m-sr) units). This parameter is for a 1 second record. This parameter is extracted from the equivalent parameter on GLA09. Rel 33 GLAS Binary Data DS_UTCTime_40
FRir_qa_flg INTEGER_1
(UNLIMITED)
Full Resolution 1064 Quality Flag
(NOT_SET)
NOT_SET Full resolution 1064 Quality Flag; 0 - 12 indicate Cloud detected by cloud search algorithm with higher numbers indicating a stronger average signal from the region starting at cloud top and extending 500 m below cloud top height; 13 = Indicates the possible presence of a cloud based on the value of the integrated signal parameter (i_FRir_intsig) that was not detected directly by the cloud search algorithm. When this occurs, the 40 Hz cloud top height (i_Frir_cldtop) is set to a value of 10.0 km; 14 = Indicates the likely presence of low clouds (< 150 m) based on elevated signal from the two bins above the ground return bin that were not detected directly by the cloud search algorithm. When this occurs, the 40 Hz cloud top height (i_Frir_cldtop) is set to a value of 0.10; 15 = No clouds

flag values flag_meanings
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 0 1 2 3 4 5 6 7 8 9 10 11 12 possible likely
Rel 33 GLAS Binary Data DS_UTCTime_40

/ANCILLARY_DATA

/ANCILLARY_DATA

Attribute Example Value
Campaign 3J
glas_osc_rate 1.00000002934
glas_osc_rate_date 2008-02-13
glas_osc_rate_time 22:27:27
sc_osc_rate 0.99999998854809
sc_osc_rate_date 2008-02-13
sc_osc_rate_time 22:27:27
internal_time_delay 0.0000151100
internal_time_delay_date 2008-02-13
internal_time_delay_time 22:27:27
internal_range_delay 9.5560
internal_range_delay_date 2008-02-13
internal_range_delay_time 22:27:27
Additional_Attribute SP_ICE_PATH_NO, SP_ICE_GLAS_StartBlock, SP_ICE_GLAS_EndBlock, ReferenceOrbit, Track, PercentGroundHit, Cycle, OrbitQuality, Instance, Range_Bias, Range_Bias_Date, Range_Bias_Time, Timing_Bias, Timing_Bias_Date, Timing_Bias_Time
globAvSrfPres1 100918.3941886
gASP_t1 257774400.0000000
globAvSrfPres2 100918.8625019
gASP_t2 257796000.0000000
globAvSrfPres3 100950.7786572
gASP_t3 257817600.0000000
globAvSrfPres4 100970.2879132
gASP_t4 257839200.0000000
globAvSrfPres5 100983.5085598
gASP_t5 257860800.0000000
internal_range_delay_desc Internal range calibration bias determined during GLAS instrument integration testing and validated in-flight, meters.
internal_time_delay_desc Internal time calibration bias determined during GLAS instrument integration testing and validated in-flight, seconds.

/METADATA

/METADATA

Attribute Example Value
description This group contains structured, computer-parseable ECHO-style collection and inventory-level metadata.
HDFVersion HDF5 1.8.9
ControlFile cf_name=gla12_test.ctl

/METADATA/COLLECTIONMETADATA

Attribute Example Value
DLLName libDsESDTGlGLASPoly.001Sh.so
GranuleTimeDuration 81280
SpatialSearchType Orbit
DataFileFormat HDF5
ScienceMimeType application/x-hdfeos
BrowseMimeType application/x-hdfeos
BrowseOnlineMimeType image/jpeg
ShortName GLAH12
LongName GLAS/ICESat L2 Global Antarctic and Greenland Ice Sheet Altimetry Data (HDF5)
CollectionDescription GLAH12 contains the ice sheet elevation and elevation distribution corrected for geodetic and atmospheric effects calculated from algorithms fine-tuned for ice sheet returns. Data granules contain 14 orbits of data within the ice sheet mask.
VersionID 33
CitationforExternalPublication The data used in this study were produced by the GLAS Science Team at the ICESat Science Investigator-led Processing System (I-SIPS) at NASA/GSFC. The data archive site is the NSIDC DAAC.
CollectionState In Work
MaintenanceandUpdateFrequency Daily
AccessConstraints Data may not be reproduced or distributed without including the CitationForExternalPublication for this product included in this Metadata. Data may not be distributed in an altered form without the written permission of the GLAS Science Team.
TemporalKeyword Day
SpatialKeyword Global

/METADATA/COLLECTIONMETADATA/AdditionalAttributes

Attribute Example Value
PercentGroundHit AdditionalAttributesContainer
OrbitQuality AdditionalAttributesContainer
Cycle AdditionalAttributesContainer
Track AdditionalAttributesContainer
Instrument_State AdditionalAttributesContainer
Timing_Bias AdditionalAttributesContainer
Timing_Drift AdditionalAttributesContainer
ReferenceOrbit AdditionalAttributesContainer
SP_ICE_PATH_NO AdditionalAttributesContainer
SP_ICE_GLAS_StartBlock AdditionalAttributesContainer
SP_ICE_GLAS_EndBlock AdditionalAttributesContainer
Instance AdditionalAttributesContainer
Range_Bias AdditionalAttributesContainer
Instrument_State_Date AdditionalAttributesContainer
Instrument_State_Time AdditionalAttributesContainer
Range_Bias_Date AdditionalAttributesContainer
Range_Bias_Time AdditionalAttributesContainer
Timing_Bias_Date AdditionalAttributesContainer
Timing_Bias_Time AdditionalAttributesContainer
Timing_Drift_Date AdditionalAttributesContainer
Timing_Drift_Time AdditionalAttributesContainer
identifier_product_doi AdditionalAttributesContainer
identifier_file_uuid AdditionalAttributesContainer
identifier_product_doi_authority AdditionalAttributesContainer

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Cycle

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription A count of the number of exact repeats of this reference orbit.
AdditionalAttributeName Cycle
ParameterUnitsofMeasurement counts
ParameterRangeBegin 0
ParameterRangeEnd 250

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Instance

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription The number of times that we have returned to a specific reference orbit.
AdditionalAttributeName Instance
ParameterUnitsofMeasurement counts
ParameterRangeBegin 1
ParameterRangeEnd 99

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Instrument_State

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription Flag word that indicates which redundant units (laser, detector, oscillator) of the GLAS instrument are in operation.
AdditionalAttributeName Instrument_State
ParameterUnitsofMeasurement Flag word
ParameterRangeBegin 0
ParameterRangeEnd 5

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Instrument_State_Date

Attribute Example Value
AdditionalAttributeDatatype date
AdditionalAttributeDescription The date that corresponds to the first valid Instrument_State. There is a maximum of two per granule.
AdditionalAttributeName Instrument_State_Date

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Instrument_State_Time

Attribute Example Value
AdditionalAttributeDatatype time
AdditionalAttributeDescription The time that corresponds to the first valid Instrument_State. There is a maximum of two per granule.
AdditionalAttributeName Instrument_State_Time

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/OrbitQuality

Attribute Example Value
AdditionalAttributeDatatype varchar
AdditionalAttributeDescription Status word that states what type of orbit was used during processing of the data for the granule. It specifies the models used in the orbit determination program. This provides an indication of the quality of the orbits being applied to the data.
AdditionalAttributeName OrbitQuality
ParameterUnitsofMeasurement Flag

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/PercentGroundHit

Attribute Example Value
AdditionalAttributeDatatype float
AdditionalAttributeDescription Percent of data for this granule that had a detected ground return of the transmitted laser pulse.
AdditionalAttributeName PercentGroundHit
ParameterUnitsofMeasurement Percent
ParameterRangeBegin 0.0
ParameterRangeEnd 100.0
ParameterValueAccuracy 1
ParameterMeasurementResolution 1

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Range_Bias

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription The additive calibration correction in millimeters to apply to range based on the science team cal/val activities.
AdditionalAttributeName Range_Bias
ParameterUnitsofMeasurement Millimeters
ParameterRangeBegin -10000
ParameterRangeEnd 10000
ParameterValueAccuracy 1
ParameterMeasurementResolution 1

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Range_Bias_Date

Attribute Example Value
AdditionalAttributeDatatype date
AdditionalAttributeDescription The date that corresponds to the first valid Range_Bias. There are a maximum of two per granule.
AdditionalAttributeName Range_Bias_Date

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Range_Bias_Time

Attribute Example Value
AdditionalAttributeDatatype time
AdditionalAttributeDescription The time that corresponds to the first valid Range_Bias. There are a maximum of two per granule.
AdditionalAttributeName Range_Bias_Time

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/ReferenceOrbit

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription Assigned number for which exact orbital elements describe the exact repeat orbit pattern.
AdditionalAttributeName ReferenceOrbit
ParameterUnitsofMeasurement Assigned number
ParameterRangeBegin 1
ParameterRangeEnd 30000

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/SP_ICE_GLAS_EndBlock

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription Integer number within GLAS coverage scheme in which granule data ends.
AdditionalAttributeName SP_ICE_GLAS_EndBlock
ParameterRangeBegin 1
ParameterRangeEnd 360

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/SP_ICE_GLAS_StartBlock

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription Integer number within GLAS coverage scheme in which granule data starts.
AdditionalAttributeName SP_ICE_GLAS_StartBlock
ParameterRangeBegin 1
ParameterRangeEnd 360

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/SP_ICE_PATH_NO

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription Number which represents the GLAS path number.
AdditionalAttributeName SP_ICE_PATH_NO
ParameterRangeBegin 1
ParameterRangeEnd 32768

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Timing_Bias

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription The time tag error determined by the calibration team that was added to the time tags to compute the true time of data as provided on the granule.
AdditionalAttributeName Timing_Bias
ParameterUnitsofMeasurement Microseconds
ParameterRangeBegin -1000000
ParameterRangeEnd +1000000

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Timing_Bias_Date

Attribute Example Value
AdditionalAttributeDatatype date
AdditionalAttributeDescription The date that corresponds to the first valid Timing_Bias. There are a maximum of two per granule.
AdditionalAttributeName Timing_Bias_Date

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Timing_Bias_Time

Attribute Example Value
AdditionalAttributeDatatype time
AdditionalAttributeDescription The time that corresponds to the first valid Timing_Bias. There are a maximum of two per granule.
AdditionalAttributeName Timing_Bias_Time

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Timing_Drift

Attribute Example Value
AdditionalAttributeDatatype float
AdditionalAttributeDescription This is the ratio of the true time for a one second oscilator tick to nominal one
AdditionalAttributeName Timing_Drift
ParameterRangeBegin -1.0
ParameterRangeEnd +1.0

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Timing_Drift_Date

Attribute Example Value
AdditionalAttributeDatatype date
AdditionalAttributeDescription The date that corresponds to the first valid Timing_Drift. There are a maximum of two per granule.
AdditionalAttributeName Timing_Drift_Date

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Timing_Drift_Time

Attribute Example Value
AdditionalAttributeDatatype time
AdditionalAttributeDescription The time that corresponds to the first valid Timing_Drift. There are a maximum of two per granule.
AdditionalAttributeName Timing_Drift_Time

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/Track

Attribute Example Value
AdditionalAttributeDatatype int
AdditionalAttributeDescription The unique number assigned for each repeat ground track (one orbit) of the reference orbit.
AdditionalAttributeName Track
ParameterUnitsofMeasurement counts
ParameterRangeBegin 0
ParameterRangeEnd 3000

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/identifier_file_uuid

Attribute Example Value
AdditionalAttributeDatatype varchar
AdditionalAttributeDescription Universally unique identifier for this data product's files
AdditionalAttributeName identifier_file_uuid

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/identifier_product_doi

Attribute Example Value
AdditionalAttributeDatatype varchar
AdditionalAttributeDescription Digital object identifier that uniquely identifies this data product
AdditionalAttributeName identifier_product_doi

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/identifier_product_doi/InformationContent

Attribute Example Value
ParameterValue 10.5067/ICESAT/GLAS/DATA205

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/identifier_product_doi_authority

Attribute Example Value
AdditionalAttributeDatatype varchar
AdditionalAttributeDescription URL of the digital object identifier resolving authority
AdditionalAttributeName identifier_product_doi_authority

/METADATA/COLLECTIONMETADATA/AdditionalAttributes/identifier_product_doi_authority/InformationContent

Attribute Example Value
ParameterValue http://dx.doi.org

/METADATA/COLLECTIONMETADATA/CSDTDescription

Attribute Example Value
PrimaryCSDT n-Dim Array of Records
IndirectReference tracks/orbits
Implementation HDF
CSDTComments Two dimensional arrays with six segments per track (orbit).The segments are: (1)equator to +50 lat,(2)+50 lat across pole to +50 lat,(3)+50 deg lat to equator,(4)equator to -50 lat,(5)-50 deg lat across pole to -50 deg lat,(6)-50 deg lat to equator.

/METADATA/COLLECTIONMETADATA/CollectionAssociation

Attribute Example Value
GLAH06 CollectionAssociationContainer
GLAH05 CollectionAssociationContainer
GLAH01 CollectionAssociationContainer
GLA00 CollectionAssociationContainer
GLAH13 CollectionAssociationContainer
GLAH14 CollectionAssociationContainer
GLAH15 CollectionAssociationContainer

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLA00

Attribute Example Value
CollectionType Science Associated
CollectionUse The initial collection of GLAS instrument data downlinked from the spacecraft
ShortName GLA00
VersionID 1

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLAH01

Attribute Example Value
CollectionType Science Associated
CollectionUse Level 1A file containing altimeter height, waveform data, and other data required to produce the Level 1B waveform products
ShortName GLAH01
VersionID 33

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLAH05

Attribute Example Value
CollectionType Input
CollectionUse Level 1B file containing: the range, corrections to the range from the waveform retracking algorithms, and the reflectance
ShortName GLAH05
VersionID 33

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLAH06

Attribute Example Value
CollectionType Input
CollectionUse Level 1B file containing: elevations, elevation corrections, reflectance, and associated timing and data quality information
ShortName GLAH06
VersionID 33

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLAH13

Attribute Example Value
CollectionType Science Associated
CollectionUse Level 2 file containing: Sea Ice Elevation, Reflectancce, and Ice Berg Elevations. The product parameters are the result of product-specialized waveform fitting.
ShortName GLAH13
VersionID 33

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLAH14

Attribute Example Value
CollectionType Science Associated
CollectionUse Level 2 file containing: corrected surface elevations above the reference ellipsoid, reflectance, and the corrections that were used. The product parameters are the result of product-specialized waveform fitting.
ShortName GLAH14
VersionID 33

/METADATA/COLLECTIONMETADATA/CollectionAssociation/GLAH15

Attribute Example Value
CollectionType Science Associated
CollectionUse Level 2 file containing: corrected Ocean elevations above the reference ellipsoid, reflectance, and the corrections that were used. The product parameters are the result of product-specialized waveform fitting.
ShortName GLAH15
VersionID 33

/METADATA/COLLECTIONMETADATA/ContactOrganization

Attribute Example Value
Data_Originator ContactOrganizationContainer
Archive ContactOrganizationContainer

/METADATA/COLLECTIONMETADATA/ContactOrganization/Archive

Attribute Example Value
Role Archive
HoursofService M-F, 8:00am to 5:00pm, Mountain Time
ContactInstructions For inquiries, contact NSIDC User Services. Primary first level contact.
ContactOrganizationName NSIDC User Services
StreetAddress CIRES/NSIDC University of Colorado Campus, Box 449
City Boulder
StateProvince Colorado
PostalCode 80309-0449
Country USA
TelephoneNumber 303-492-2468
TelephoneNumberType Facsimile
ElectronicMailAddress nsidc@nsidc.org

/METADATA/COLLECTIONMETADATA/ContactOrganization/Data_Originator

Attribute Example Value
Role Data Originator
HoursofService M-F, 8:00am to 4:30pm Eastern Time
ContactInstructions Contact by e-mail first
ContactOrganizationName ICESat Science Investigator-led Processing System (I-SIPS)
StreetAddress Building 33, NASA Goddard Space Flight Center
City Greenbelt
StateProvince Maryland
PostalCode 20771
Country USA
TelephoneNumber 757-864-1238
TelephoneNumberType Voice
ElectronicMailAddress David.W.Hancock@nasa.gov

/METADATA/COLLECTIONMETADATA/ContactPerson

Attribute Example Value
Hancock ContactPersonContainer
Schutz ContactPersonContainer
Zwally ContactPersonContainer
DiMarzio ContactPersonContainer

/METADATA/COLLECTIONMETADATA/ContactPerson/DiMarzio

Attribute Example Value
Role Producer
HoursofService M-F, 8:00am to 4:30pm Eastern Time
ContactInstructions None
ContactJobPosition Deputy Science Software Development Manager
ContactFirstName John
ContactMiddleName P
ContactLastName DiMarzio
StreetAddress Building 33, Rm. B-209D, NASA/GSFC
City Greenbelt
StateProvince Maryland
PostalCode 20771
Country USA
TelephoneNumber 301-614-5893
TelephoneNumberType Voice
ElectronicMailAddress John.P.Dimarzio.1@nasa.gov

/METADATA/COLLECTIONMETADATA/ContactPerson/Hancock

Attribute Example Value
Role Data Originator
HoursofService M-F, 8:00am to 4:30pm. Eastern Time.
ContactInstructions None
ContactJobPosition Science Software Development Manager.
ContactFirstName David
ContactMiddleName W.
ContactLastName Hancock
StreetAddress Building N-159, NASA/GSFC Wallops Flight Facility.
City Wallops Island
StateProvince Virginia
PostalCode 23337
Country USA
TelephoneNumber 757-824-1238
TelephoneNumberType Voice
ElectronicMailAddress David.W.Hancock@nasa.gov

/METADATA/COLLECTIONMETADATA/ContactPerson/Schutz

Attribute Example Value
Role Investigator
HoursofService M-F, 8:00am to 4:30pm Central Time
ContactInstructions None
ContactJobPosition GLAS Science Team Leader
ContactFirstName Bob
ContactMiddleName E
ContactLastName Schutz
StreetAddress 3925 W. Braker Lane, Center for Space Research
City Austin
StateProvince Texas
PostalCode 78759-5321
Country USA
TelephoneNumber 512-471-4267
TelephoneNumberType Voice
ElectronicMailAddress schutz@utcsr.ae.utexas.edu

/METADATA/COLLECTIONMETADATA/ContactPerson/Zwally

Attribute Example Value
Role Producer
HoursofService M-F, 8:00am to 4:30pm Eastern Time
ContactInstructions None.
ContactJobPosition ICESat Project Scientist
ContactFirstName Jay
ContactLastName Zwally
StreetAddress Building 33, Rm A-217
City Greenbelt
StateProvince Maryland
PostalCode 20771
Country USA
TelephoneNumber 301-614-5643
TelephoneNumberType Voice
ElectronicMailAddress Jay.Zwally@nasa.gov

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters

Attribute Example Value
Hydrosphere DisciplineTopicParametersContainer
Land_Surface DisciplineTopicParametersContainer
Cryosphere DisciplineTopicParametersContainer
Oceans DisciplineTopicParametersContainer

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters/Cryosphere

Attribute Example Value
ECSDisciplineKeyword Earth Science
ECSTopicKeyword Cryosphere
ECSTermKeyword Sea Ice
ECSVariableKeyword Reflectance

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters/Cryosphere/ECSParameter

Attribute Example Value
ECSParameterKeyword Laser Reflectance

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters/Hydrosphere

Attribute Example Value
ECSDisciplineKeyword Earth Science
ECSTopicKeyword Hydrosphere
ECSTermKeyword Glaciers/Ice Sheets
ECSVariableKeyword Glacier Elevation/Ice Sheet Elevation

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters/Land_Surface

Attribute Example Value
ECSDisciplineKeyword Earth Science
ECSTopicKeyword Land Surface
ECSTermKeyword Topography
ECSVariableKeyword Terrain Elevation

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters/Oceans

Attribute Example Value
ECSDisciplineKeyword Earth Science
ECSTopicKeyword Oceans
ECSTermKeyword Sea Ice
ECSVariableKeyword Reflectance

/METADATA/COLLECTIONMETADATA/DisciplineTopicParameters/Oceans/ECSParameter

Attribute Example Value
ECSParameterKeyword Laser Reflectance

/METADATA/COLLECTIONMETADATA/ECSCollection

Attribute Example Value
RevisionDate 2012-06-25
SuggestedUsage GLAH12 contains ice sheet elevation and elevation distribution calculated from algorithms fine-tuned for ice sheet returns for use by researchers. Parameters are at the full 40Hz resolution that fall within the ICESat ice sheet mask. Each GLAH12 file was created from an equivalent GLA12 binary file. The data used to create the GLAH12 values are contained in the equivalent GLAHxx files for the GLAxx files. See the provenance metadata for the creation of the GLA12.
ProcessingCenter GSFC I-SIPS
ArchiveCenter NSIDC
VersionDescription Initial Version
DatasetDisclaimerPointer http://nsidc.org/data/icesat/disclaimer.html
ECSCollectionGuidePointer http://nsidc.org/data/docs/daac/glas_icesat_l1_l2_global_altimetry.gd.html
ECSCollectionGuidePointerComment Guide Document for this product at NSIDC
MiscellaneousInformationPointer http://nsidc.org/daac/icesat/index.html
MiscellaneousInformationPointerComment GLAS Product page at NSIDC

/METADATA/COLLECTIONMETADATA/Platform

Attribute Example Value
ICESat PlatformContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat

Attribute Example Value
PlatformShortName ICESat
PlatformLongName Ice, Cloud, and Land Elevation Satellite
PlatformType Spacecraft

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument

Attribute Example Value
GLAS InstrumentContainer
GPS InstrumentContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS

Attribute Example Value
InstrumentShortName GLAS
InstrumentLongName Geoscience Laser Altimeter System
InstrumentTechnique Laser Altimetry and Light Detection and Radar
NumberofSensors 3

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/InstrumentCharacteristic

Attribute Example Value
SwathWidth InstrumentCharacteristicContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/InstrumentCharacteristic/SwathWidth

Attribute Example Value
InstrumentCharacteristicName SwathWidth
InstrumentCharacteristicDescription The width of the sensor scan as the satellite moves along the ground track.
InstrumentCharacteristicDataType int
InstrumentCharacteristicUnit kilometers
InstrumentCharacteristicValue 2

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor

Attribute Example Value
LA SensorContainer
PC SensorContainer
CD SensorContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/CD

Attribute Example Value
SensorShortName CD
SensorLongName Cloud LIDAR
SensorTechnique Measure of 1064nm return energy in 75m bins from 20km to surface

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/CD/SensorCharacteristic

Attribute Example Value
wavelength SensorCharacteristicContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/CD/SensorCharacteristic/wavelength

Attribute Example Value
SensorCharacteristicName wavelength
SensorCharacteristicDescription detector
SensorCharacteristicDataType varchar
SensorCharacteristicUnit nanometer
SensorCharacteristicValue 1064 nm

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/LA

Attribute Example Value
SensorShortName LA
SensorLongName Laser Altimeter
SensorTechnique Exact Measurement of Time between Transmit Pulse and receive ground return

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/LA/SensorCharacteristic

Attribute Example Value
wavelength SensorCharacteristicContainer
waveform SensorCharacteristicContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/LA/SensorCharacteristic/waveform

Attribute Example Value
SensorCharacteristicName waveform
SensorCharacteristicDescription digitizer
SensorCharacteristicDataType varchar
SensorCharacteristicUnit counts
SensorCharacteristicValue 0-255

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/LA/SensorCharacteristic/wavelength

Attribute Example Value
SensorCharacteristicName wavelength
SensorCharacteristicDescription transmission
SensorCharacteristicDataType varchar
SensorCharacteristicUnit nanometer
SensorCharacteristicValue 1064 nm

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/PC

Attribute Example Value
SensorShortName PC
SensorLongName Photon Counter for the 532 nm Aerosol Returns
SensorTechnique Counting of 532nm photon return in 75m bins 40km to surface

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/PC/SensorCharacteristic

Attribute Example Value
wavelength SensorCharacteristicContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GLAS/Sensor/PC/SensorCharacteristic/wavelength

Attribute Example Value
SensorCharacteristicName wavelength
SensorCharacteristicDescription detector
SensorCharacteristicDataType varchar
SensorCharacteristicUnit nanometer
SensorCharacteristicValue 532nm

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GPS

Attribute Example Value
InstrumentShortName GPS
InstrumentLongName Global Positioning System Receiver
InstrumentTechnique Radionavigation
NumberofSensors 1

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GPS/Sensor

Attribute Example Value
GPS_Receiver SensorContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/Instrument/GPS/Sensor/GPS_Receiver

Attribute Example Value
SensorShortName GPS Receiver
SensorLongName Dual frequency GPS receiver
SensorTechnique Pseudorange and carrier phase

/METADATA/COLLECTIONMETADATA/Platform/ICESat/PlatformCharacteristic

Attribute Example Value
OrbitInclination PlatformCharacteristicContainer
OrbitalPeriod PlatformCharacteristicContainer

/METADATA/COLLECTIONMETADATA/Platform/ICESat/PlatformCharacteristic/OrbitInclination

Attribute Example Value
PlatformCharacteristicName OrbitInclination
PlatformCharacteristicDescription Angle between the orbit plane and the Earth's equatorial plane
PlatformCharacteristicDataType float
PlatformCharacteristicUnit Degrees
PlatformCharacteristicValue 94.0

/METADATA/COLLECTIONMETADATA/Platform/ICESat/PlatformCharacteristic/OrbitalPeriod

Attribute Example Value
PlatformCharacteristicName OrbitalPeriod
PlatformCharacteristicDescription Orbital period in decimal minutes.
PlatformCharacteristicDataType float
PlatformCharacteristicUnit Minutes
PlatformCharacteristicValue 96.7

/METADATA/COLLECTIONMETADATA/ProcessingLevel

Attribute Example Value
ProcessingLevelDescription Geophysical Quantities at the sensor resolution or geolocated
ProcessingLevelID 2

/METADATA/COLLECTIONMETADATA/Review

Attribute Example Value
ScienceReviewDate 2001-03-04
ScienceReviewStatus QA at DAACs
FutureReviewDate 2001-09-04

/METADATA/COLLECTIONMETADATA/Spatial

Attribute Example Value
SpatialCoverageType Horizontal
WestBoundingCoordinate -180.0
NorthBoundingCoordinate 90.0
EastBoundingCoordinate 180.0
SouthBoundingCoordinate -90.0

/METADATA/COLLECTIONMETADATA/StorageMediumClass

Attribute Example Value
StorageMedium Online

/METADATA/COLLECTIONMETADATA/Temporal

Attribute Example Value
TimeType UTC
DateType J2000
TemporalRangeType Continuous Range
PrecisionofSeconds 2
EndsatPresentFlag Y
RangeBeginningDate 2003-01-13
RangeBeginningTime 00:00:00
RangeEndingDate 2010-01-13
RangeEndingTime 00:00:00

/METADATA/INVENTORYMETADATA

Attribute Example Value
PGEVersion Version 1.2
ShortName GLAH12
VersionID 33
RangeBeginningTime 02:51:46
RangeEndingTime 01:24:53
RangeBeginningDate 2008-03-03
RangeEndingDate 2008-03-04

/METADATA/INVENTORYMETADATA/ECSDataGranule

Attribute Example Value
ReprocessingPlanned no further update anticipated
ReprocessingActual reprocessed
LocalGranuleID GLAH12_633_2123_002_0141_0_01_0001.H5
ProductionDateTime 2013-01-16T18:58:01
LocalVersionID 33

/METADATA/INVENTORYMETADATA/InputGranule

Attribute Example Value
InputPointer gla12_test.ctl, tai-utc.dat, GLA12_633_2123_002_0141_0_01_0001.DAT, DsESDTGlGLAH12.033.desc

/METADATA/INVENTORYMETADATA/MeasuredParameter

Attribute Example Value
ParameterName Surface_Elevation, Surface_Reflectance

/METADATA/INVENTORYMETADATA/OrbitCalculatedSpatialDomain

Attribute Example Value
OrbitNumber 27949, 27950, 27951, 27952, 27953, 27954, 27955, 27956, 27957, 27958, 27959, 27960, 27961, 27962, 27963
StartOrbitNumber 27949
StopOrbitNumber 27963
EquatorCrossingLongitude -147.35388, -171.54936, 164.25522, 140.06049, 115.865814, 91.669395, 67.47331, 43.27821, 19.08381, -5.1098022, -29.304016, -53.499268, -77.69345, -101.887634, -126.08266
EquatorCrossingTime 02:38:23, 04:15:02, 05:51:41, 07:28:20, 09:04:58, 10:41:37, 12:18:16, 13:54:55, 15:31:36, 17:08:15, 18:44:54, 20:21:33, 21:58:12, 23:34:51, 01:11:29
EquatorCrossingDate 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-03, 2008-03-04

/METADATA/INVENTORYMETADATA/ProductSpecificMetadata

Attribute Example Value
PercentGroundHit 0
OrbitQuality 6
Cycle 2
Track 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155
Instrument_State 373340
Timing_Bias 0
ReferenceOrbit 1
SP_ICE_PATH_NO 3163, 3164, 3165, 3166, 3167, 3168, 3169, 3170, 3171, 3172, 3173, 3174, 3175, 3176, 3177
SP_ICE_GLAS_StartBlock NOT SET
SP_ICE_GLAS_EndBlock NOT SET
Instance 23
Range_Bias 0
Instrument_State_Date 2008-02-13
Instrument_State_Time 22:27:25
Range_Bias_Date 2008-02-13
Range_Bias_Time 22:27:27
Timing_Bias_Date 2008-02-13
Timing_Bias_Time 22:27:27
identifier_product_doi 10.5067/ICESAT/GLAS/DATA205
identifier_file_uuid 599740C3-F062-4F49-A756-8A0DA37BC95B
identifier_product_doi_authority http://dx.doi.org

/METADATA/PROVENANCE

/METADATA/PROVENANCE/STEP_1

Attribute Example Value
ProcessDateTime 2011-09-17T02:59:51

/METADATA/PROVENANCE/STEP_1/ProcessAgent

Attribute Example Value
Name glas_alt
Type 2
Version 6.0.1
Description This process is an instantiation of the GLAS Science Algorithm Software (GSAS) 2 ATBDs.

/METADATA/PROVENANCE/STEP_1/ProcessInput

Attribute Example Value
Name GLA05_633_2123_002_0141_1_01_0001.DAT, GLA05_633_2123_002_0141_2_01_0001.DAT, GLA05_633_2123_002_0141_3_01_0001.DAT, GLA05_633_2123_002_0141_4_01_0001.DAT, GLA05_633_2123_002_0142_1_01_0001.DAT, GLA05_633_2123_002_0142_2_01_0001.DAT, GLA05_633_2123_002_0142_3_01_0001.DAT, GLA05_633_2123_002_0142_4_01_0001.DAT, GLA05_633_2123_002_0143_1_01_0001.DAT, GLA05_633_2123_002_0143_2_01_0001.DAT, GLA05_633_2123_002_0143_3_01_0001.DAT, GLA05_633_2123_002_0143_4_01_0001.DAT, GLA05_633_2123_002_0144_1_01_0001.DAT, GLA05_633_2123_002_0144_2_01_0001.DAT, GLA05_633_2123_002_0144_3_01_0001.DAT, GLA05_633_2123_002_0144_4_01_0001.DAT, GLA05_633_2123_002_0145_1_01_0001.DAT, GLA05_633_2123_002_0145_2_01_0001.DAT, GLA05_633_2123_002_0145_3_01_0001.DAT, GLA05_633_2123_002_0145_4_01_0001.DAT, GLA05_633_2123_002_0146_1_01_0001.DAT, GLA05_633_2123_002_0146_2_01_0001.DAT, GLA05_633_2123_002_0146_3_01_0001.DAT, GLA05_633_2123_002_0146_4_01_0001.DAT, GLA05_633_2123_002_0147_1_01_0001.DAT, GLA05_633_2123_002_0147_2_01_0001.DAT, GLA05_633_2123_002_0147_3_01_0001.DAT, GLA05_633_2123_002_0147_4_01_0001.DAT, GLA05_633_2123_002_0148_1_01_0001.DAT, GLA05_633_2123_002_0148_2_01_0001.DAT, GLA05_633_2123_002_0148_3_01_0001.DAT, GLA05_633_2123_002_0148_4_01_0001.DAT, GLA05_633_2123_002_0149_1_01_0001.DAT, GLA05_633_2123_002_0149_2_01_0001.DAT, GLA05_633_2123_002_0149_3_01_0001.DAT, GLA05_633_2123_002_0149_4_01_0001.DAT, GLA05_633_2123_002_0150_1_01_0001.DAT, GLA05_633_2123_002_0150_2_01_0001.DAT, GLA05_633_2123_002_0150_3_01_0001.DAT, GLA05_633_2123_002_0150_4_01_0001.DAT, GLA05_633_2123_002_0151_1_01_0001.DAT, GLA05_633_2123_002_0151_2_01_0001.DAT, GLA05_633_2123_002_0151_3_01_0001.DAT, GLA05_633_2123_002_0151_4_01_0001.DAT, GLA05_633_2123_002_0152_1_01_0001.DAT, GLA05_633_2123_002_0152_2_01_0001.DAT, GLA05_633_2123_002_0152_3_01_0001.DAT, GLA05_633_2123_002_0152_4_01_0001.DAT, GLA05_633_2123_002_0153_1_01_0001.DAT, GLA05_633_2123_002_0153_2_01_0001.DAT, GLA05_633_2123_002_0153_3_01_0001.DAT, GLA05_633_2123_002_0153_4_01_0001.DAT, GLA05_633_2123_002_0154_1_01_0001.DAT, GLA05_633_2123_002_0154_2_01_0001.DAT, GLA05_633_2123_002_0154_3_01_0001.DAT, GLA05_633_2123_002_0154_4_01_0001.DAT, GLA09_633_2123_002_0141_0_01_0001.DAT, GLA11_633_2123_002_0141_0_01_0001.DAT, ANC01_006_20080302_180000_01_0000.DAT, ANC01_006_20080303_000000_01_0000.DAT, ANC01_006_20080303_060000_01_0000.DAT, ANC01_006_20080303_120000_01_0000.DAT, ANC01_006_20080303_180000_01_0000.DAT, ANC01_006_20080304_000000_01_0000.DAT, ANC01_006_20080302_180000_01_0002.DAT, ANC01_006_20080303_000000_01_0002.DAT, ANC01_006_20080303_060000_01_0002.DAT, ANC01_006_20080303_120000_01_0002.DAT, ANC01_006_20080303_180000_01_0002.DAT, ANC01_006_20080304_000000_01_0002.DAT, ANC01_006_20080302_180000_01_0003.DAT, ANC01_006_20080303_000000_01_0003.DAT, ANC01_006_20080303_060000_01_0003.DAT, ANC01_006_20080303_120000_01_0003.DAT, ANC01_006_20080303_180000_01_0003.DAT, ANC01_006_20080304_000000_01_0003.DAT, ANC01_006_20080302_180000_01_0004.DAT, ANC01_006_20080303_000000_01_0004.DAT, ANC01_006_20080303_060000_01_0004.DAT, ANC01_006_20080303_120000_01_0004.DAT, ANC01_006_20080303_180000_01_0004.DAT, ANC01_006_20080304_000000_01_0004.DAT, ANC01_006_20080302_180000_01_0001.DAT, ANC01_006_20080303_000000_01_0001.DAT, ANC01_006_20080303_060000_01_0001.DAT, ANC01_006_20080303_120000_01_0001.DAT, ANC01_006_20080303_180000_01_0001.DAT, ANC01_006_20080304_000000_01_0001.DAT, ANC01_006_20080302_180000_01_0005.DAT, ANC01_006_20080303_000000_01_0005.DAT, ANC01_006_20080303_060000_01_0005.DAT, ANC01_006_20080303_120000_01_0005.DAT, ANC01_006_20080303_180000_01_0005.DAT, ANC01_006_20080304_000000_01_0005.DAT, ANC01_006_20080302_180000_01_0006.DAT, ANC01_006_20080303_000000_01_0006.DAT, ANC01_006_20080303_060000_01_0006.DAT, ANC01_006_20080303_120000_01_0006.DAT, ANC01_006_20080303_180000_01_0006.DAT, ANC01_006_20080304_000000_01_0006.DAT, ANC01_006_20080302_180000_01_0007.DAT, ANC01_006_20080303_000000_01_0007.DAT, ANC01_006_20080303_060000_01_0007.DAT, ANC01_006_20080303_120000_01_0007.DAT, ANC01_006_20080303_180000_01_0007.DAT,
Type GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA05, GLA09, GLA11, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC01, ANC04, ANC04, anc07, anc07, anc07, anc07, anc07, anc07, anc07, ANC08, ANC08, ANC09, ANC09, anc12, anc12, anc13, anc16, anc17, anc25, anc27, anc27, ANC33, anc41, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc45, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc51, anc52, anc52, anc54, anc54, anc54, anc54, anc54, anc54, anc55, ANC56, ANC57, anc58, anc58, anc58, anc58, anc58, anc58, anc58, anc58, anc58, anc58, anc58, anc58
Version 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 633, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 006, 007, 007, 033, 033, 033, 033, 033, 033, 033, 015, 015, 076, 076, 004, 004, 006, 004, 004, 005, 001, 001, 001, 009, 033, 033, 033, 033, 033, 033, 033, 033, 033, 033, 033, 033, 033, 033, 033, 003, 003, 003, 003, 003, 003, 003, 003, 003, 003, 003, 003, 003, 003, 003, 007, 007, 002, 002, 002, 002, 002, 002, 001, 001, 001, 002, 002, 002, 002, 002, 002, 002, 002, 002, 002, 002, 002

/METADATA/PROVENANCE/STEP_1/ProcessOutput

Attribute Example Value
Name GLA12_633_2123_002_0141_0_01_0001.DAT
Type GLA12
Version 633

/METADATA/PROVENANCE/STEP_2

Attribute Example Value
ProcessDateTime 2013-01-16T18:58:01.000000Z

/METADATA/PROVENANCE/STEP_2/ProcessAgent

Attribute Example Value
Name GLA12_h5_convert
Type Data_Reformat
Version Version 1.2 (January 2013)
Description GLA12 Conversion PGE

/METADATA/PROVENANCE/STEP_2/ProcessInput

Attribute Example Value
Name ./gla12_test.ctl, ../data/tai-utc.dat, ./GLA12_633_2123_002_0141_0_01_0001.DAT, ./DsESDTGlGLAH12.033.desc
Type IN_CNTL, IN_ANC_TAIUTC, IN_GLA12, IN_ESDT
Version 0, 0, 1, 1

/METADATA/PROVENANCE/STEP_2/ProcessOutput

Attribute Example Value
Name ./GLAH12_633_2123_002_0141_0_01_0001.H5
Type OUT_GLAH12
Version 1
UUID 599740C3-F062-4F49-A756-8A0DA37BC95B
DOI 10.5067/ICESAT/GLAS/DATA205

Page last updated: 02/07/13

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