2024-03-29T05:46:34Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/GLA152024-01-25T13:16:48Zecsretirednasa_nsidc_daac
GLA15GLAS/ICESat L2 Ocean Surface Altimetry DataZwally, H. J., R. Schutz, C. Bentley, J. Bufton, J. Minster, J. Spinhirne, and R. Thomas.GLAS/ICESat L2 Ocean Surface Altimetry Data2014-06-17Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center34false10.5067/ICESAT/GLAS/DATA228https://doi.org/10.5067/ICESAT/GLAS/DATA228GLA15Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAInvestigatorH.JayZwallyJay.Zwally@nasa.gov1-301-614-56431-301-614-5644Laboratory for Hydrospheric ProcessesNASA/Goddard Space Flight CenterCode 971GreenbeltMD20771USAInvestigatorRobertSchutzGLAS Science Team LeadUniversity of Texas at AustinCenter for Space ResearchAustinTX78712-1085USAInvestigatorCharlesBentleyDept. of Geology and GeophysicsUniversity of WisconsinMadisonWI53706InvestigatorJackBuftonNASA/Goddard Space Flight CenterGreenbeltMD20771InvestigatorThomasHerringMassachusetts Institute of TechnologyCambridgeMA02139InvestigatorJean-BernardMinsterScripps Institute of OceanographyUniversity of CaliforniaLa JollaCA92093InvestigatorJamesSpinhirneNASA/Goddard Space Flight CenterGreenbeltMD20771InvestigatorRobertThomasEG&GNASA Wallops Flight FacilityWallops IslandVA23337EARTH SCIENCEOceansOcean OpticsReflectance Laser ReflectanceEARTH SCIENCEOceansSea Surface TopographySea Surface Height SEA SURFACE HEIGHTEARTH SCIENCEOceansSea Surface TopographySea Surface Slope SEA SURFACE SLOPEElevationAtmospheric Delay CorrectionDAACDemEOSDISGLA15GLASGlobal Positioning SystemICESatISIPSLaser FootprintLaser PulseNASANoise LevelNSIDCOff-nadir Pointing DirectionOrbit NumberPeak AmplitudePrecision Attitude DeterminationPrecision Orbit DeterminationRangeReceived EnergyReceived Pulse GainSea Surface ElevationSignal SaturationSolar Incidence AngleTransmitted EnergyTransmitted GainWaveformWaveform KurtosisWaveform PeakWaveform SkewnessALTIMETERSGLASGeoscience Laser Altimeter SystemICESATIce, Cloud, and land Elevation Satellite2003-02-202009-10-11complete-8686-180180Geographic RegionGlobal60 m to 70 m60 m to 70 m1288 minuteICESATIce, Cloud and Land Elevation SatelliteBrowse products in PNG graphic format contain quality information; these are available along with corresponding data granules in the Data Pool or EOS Data Gateway.
The i_FrameQF quality flag is set to '1' if there is a problem in calculating individual parameters, or the flag is set to '0' if there are no problems.EnglishNASA/GSFC/EOS/EONASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAFTP279 MBBinaryBae, S. and B.E. Schutz. 2002. Precision attitude determination (PAD). GLAS algorithm theoretical basis document. Version 2.2. Austin, TX: Center for Space Research, University of Texas at Austin.
Brenner, A.C., C.R. Bentley, B.M. Csatho, D.J. Harding, M.A. Hofton, J. Minster, L. Roberts, J.L. Saba, R. Schutz, R.H. Thomas, D. Yi, and H.J. Zwally. 2000. Derivation of range and range distributions from laser pulse waveform analysis for surface elevations, roughness, slope, and vegetation heights. Algorithm theoretical basis document. Version 3.0. Greenbelt, MD: Goddard Space Flight Center.
Center for Space Research. 'ICESat/GLAS.' January 2002. http://www.csr.utexas.edu/glas/.
Davis C.H. and H.J. Zwally. 1993. Geographic and seasonal variations in the surface properties of the ice sheets by satellite radar altimetry. Journal of Glaciology 39:687-697.
Earth Science Data and Information System (ESDIS). 1996. EOS Ground System (EGS) Systems and Operations Concept. Greenbelt, MD: Goddard Space Flight Center.
Farrell, W.E. 1972. Deformation of the Earth by surface loads. Review of Geophysics and Space Physics 10: 761-797.
GLAS Science Team. 2000. Mission Operations Requirement Document (MORD) for the Ice, Cloud and Land Elevation Satellite (ICESat) Mission. Greenbelt, MD: Goddard Space Flight Center.
GLAS Science Team. 1997. GLAS Science Requirements. Version 2.01. Greenbelt, MD: Goddard Space Flight Center.
Heroux, D. 2000. Progress report on GLAS interface effort with ECS NOSE. Rev. 29 December 2000. Landover, MD: Emergent-IT/Raytheon.
Herring, T.A. and K. Quinn. 1999. Atmospheric delay correction to GLAS laser altimeter ranges. GLAS algorithm theoretical basis document. Version 1.0. Lanham, MD: Science Systems and Applications, Inc.
Jester, P., and D. Hancock. 2002. The Algorithm Theoretical Basis Document for Level 1A Processing, Version 1.2. Wallops Island, VA: Raytheon ITSS.
Jester, P., and J. Lee. 2002. GLAS standard data products specification - level 1. Version 6.0. Wallops Island, VA: Raytheon ITSS.
Lee, J. 2002. GSAS user's guide: Version 4.0. Wallops Island, VA: Raytheon ITSS.
McGarry, J.F., J. Abshire, X. Sun, J. Saba, A. Brenner, and D. Yi. 2002. GLAS flight science data selection algorithms for the altimeter (1064 nm), Version 4.15. Unpublished report.
Rim, H., and B. Schutz. 2002. Precision orbit determination. GLAS algorithm theoretical basis document. Version 2.2. Austin, TX: Center for Space Research, University of Texas at Austin.
Schutz, B. 2000. GLAS altimeter post-launch calibration/validation plan. Version 0.99. Austin, TX: Center for Space Research, University of Texas at Austin.
Schutz, B. 2002. Laser footprint location (geolocation) and surface profiles. GLAS algorithm theoretical basis document. Version 3.0. Austin, TX: Center for Space Research, University of Texas at Austin.
Wahr, J., D. Wingham, and C. Bentley. 2000. A method of combining ICESat and GRACE satellite data to constrain Antarctic mass balance. Journal of Geophysical Research 105(B7):16,279-16,294.
Yi, D., J. Minster, and C. Bentley. 1999. Ocean tidal loading corrections. GLAS algorithm theoretical basis document. Version 1.0. Greenbelt, MD: Goddard Space Flight Center.
Zwally, H.J., B. Schutz, W. Abdalati, J. Abshire, C. Bentley, A. Brenner, J. Bufton, J. Dezio, D. Hancock, D. Harding, T. Herring, B. Minster, K. Quinn, S. Palm, J. Spinhirne, and R. Thomas. 2002. ICESAT's laser measurements of polar ice, atmosphere, ocean, and land. Journal of Geodynamics 34: 405-445.
Zwally, H.J., B. Schutz, D. Hancock, and A. Brenner. 2000. ICESat/GLAS Standard Data Products in HDF and SCF Formats. Version 1.2. Greenbelt, MD: Goddard Space Flight Center.
Zwally, H.J., R.A. Bindschadler, A.C. Brenner, T.V. Martin, and R.H. Thomas. 1983. Surface elevation contours of Greenland and Antarctic ice sheets. Journal of Geophysical Research 88(C3):1589-1596.NOTE ON GLAS BINARY DATA: Access to all ICESat/GLAS binary data products at NSIDC DAAC was removed 01 August 2017. The Binary Data Subsetter also has been decommissioned. ICESat/GLAS data remain available in <a href="http://nsidc.org/data/glah15/versions/34">HDF5 format</a>.
The Geoscience Laser Altimeter System (GLAS) instrument on the Ice, Cloud, and Land Elevation Satellite (ICESat) provides global measurements of polar ice sheet elevation to discern changes in ice volume (mass balance) over time. Secondary objectives of GLAS are to measure sea ice roughness and thickness, cloud and atmospheric properties, land topography, vegetation canopy heights, ocean surface topography, and surface reflectivity.
GLAS has a 1064 nm laser channel for surface altimetry and dense cloud heights, and a 532 nm lidar channel for the vertical distribution of clouds and aerosols.
This level-2 altimetry product (GLA15) provides surface elevations for oceans. Data also include the laser footprint gelocation and reflectance, as well as geodetic, instrument, and atmospheric corrections for range measurements.
Each data granule has an associated browse product that users can quickly view to determine the general quality of the data in the granule. Browse products consist of image plots of key parameters and statistics. Data are in scaled integer binary format, big-endian (Unix) byte order.VIEW RELATED INFORMATIONhttps://doi.org/10.5067/ICESAT/GLAS/DATA228DocumentationGET DATAhttps://nsidc.org/data/data-access-tool/GLA15/versions/34/Data Access ToolPROJECT HOME PAGEhttp://glas.wff.nasa.gov/ICESat/GLAS web site at NASA Wallops Flight FacilityPROJECT HOME PAGEhttp://icesat.gsfc.nasa.gov/ICESat/GLAS web site at NASA Goddard Space Flight CenterPROJECT HOME PAGEhttp://www.csr.utexas.edu/glas/ICESat/GLAS web site at University of TexasPROJECT HOME PAGEhttp://nsidc.org/data/icesat/index.htmlICESat/GLAS Data at NSIDCVIEW RELATED INFORMATIONhttp://nsidc.org/data/dems/index.htmlPolar Ice Sheet DEMs and Elevation DataUSA/NASACEOS IDN DIFVERSION 9.92014-06-172024-01-25NSIDCVersion SummaryRelease 34 incorporates fixes for several data issues that were determined to exist in the GLAS Release 33 data products.NSIDCMinor VersionNSIDCCurrent Version1NSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationZwally, H. J., R. Schutz, C. Bentley, J. Bufton, J. Minster, J. Spinhirne, and R. Thomas. 2014. <i>GLAS/ICESat L2 Ocean Surface Altimetry Data.</i> Version 34. [indicate subset used]. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/ICESAT/GLAS/DATA228">https://doi.org/10.5067/ICESAT/GLAS/DATA228</a>. 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