<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
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    <gcmd:keywordVersion>draft</gcmd:keywordVersion>
    <gcmd:schemeVersion>2025-07-25</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/platforms/71536bf5-2d19-4c63-a127-95264da38082</gcmd:viewer>
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  <skos:Concept rdf:about="71536bf5-2d19-4c63-a127-95264da38082">
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    <skos:prefLabel xml:lang="en">ICESat</skos:prefLabel>
    <skos:changeNote>Date=2018-04-24 User Id=sritz Entity=Resource Operation=UPDATE Field=type 
System Note=update Resource
Old Value=IMAGE
New Value=image</skos:changeNote>
    <skos:changeNote>Date=2018-04-24 User Id=sritz Entity=Resource Operation=DELETE 
System Note=delete Resource
Old Value=id: 98391
type: image
url: http://science.nasa.gov/media/medialibrary/2010/03/31/icesat.jpeg</skos:changeNote>
    <skos:changeNote>Date=2016-06-09 User Id=epneff Entity=AltLabel Operation=INSERT 
User Note=added altLabel
System Note=insert AltLabel
New Value=id: null
text: ICESAT-1
language code: en</skos:changeNote>
    <skos:changeNote>Date=2021-12-02 User Id=tstevens Entity=BroaderRelation Operation=DELETE 
User Note=Move Concepts
System Note=delete broader relation
Old Value=ICESat [71536bf5-2d19-4c63-a127-95264da38082,826367] - Earth Observation Satellites [3466eed1-2fbb-49bf-ab0b-dc08731d502b,826121]</skos:changeNote>
    <skos:changeNote>Date=2021-12-02 User Id=tstevens Entity=BroaderRelation Operation=INSERT 
User Note=Move Concepts
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New Value=ICESat [71536bf5-2d19-4c63-a127-95264da38082,826367] - Ice, Cloud and Land Elevation Satellite (ICESat) [3eb57645-3c25-4718-a255-21c8d19d0517,835939]</skos:changeNote>
    <skos:changeNote>Date=2018-04-24 User Id=sritz Entity=PrefLabel Operation=UPDATE Field=text 
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Old Value=ICESAT
New Value=ICESat</skos:changeNote>
    <skos:changeNote>Date=2018-04-24 User Id=sritz Entity=Definition Operation=UPDATE Field=text 
System Note=update Definition
Old Value=[Source: NASA ICESat home page]</skos:changeNote>
    <skos:changeNote>ICESat (Ice, Cloud,and land Elevation Satellite) is the benchmark Earth Observing System mission for measuring ice sheet mass balance, cloud and aerosol heights, as well as land topography and vegetation characteristics. From 2003 to 2009, the ICESat mission provided multi-year elevation data needed to determine ice sheet mass balance as well as cloud property information, especially for stratospheric clouds common over polar areas. It also provided topography and vegetation data around the globe, in addition to the polar-specific coverage over the Greenland and Antarctic ice sheets.</skos:changeNote>
    <skos:changeNote>Group: Platform_Details
   Entry_ID: ICESAT
   Group: Platform_Identification
      Platform_Category: Earth Observation Satellites
      Short_Name: ICESAT
      Long_Name: Ice, Cloud and Land Elevation Satellite
   End_Group
   Group: Synonymous_Platform_Names
      Short_Name: ICESAT
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: GLAS
   End_Group
   Group: Orbit
      Orbit_Altitude: ~600 km
      Orbit_Inclination: 94 degrees
      Period: ~97 minutes
      Repeat_Cycle: 91 days with ~33 days subcycle
      Perigee: 593 km (368 mi)
      Apogee: 610 km (379 mi)
      Orbit_Type: LEO &gt; Low Earth Orbit &gt; Polar Non-Sun-Synchronous
   End_Group
   Creation_Date: 2007-04-16
   Online_Resource: http://icesat.gsfc.nasa.gov/
   Online_Resource: http://www.csr.utexas.edu/glas/Mission_Description/
   Online_Resource: http://nasascience.nasa.gov/missions/icesat
   Online_Resource: http://www.csr.utexas.edu/glas/groundtrack/
   Online_Resource: http://www.csr.utexas.edu/glas/atbd.html
   Sample_Image: http://science.nasa.gov/media/medialibrary/2010/03/31/icesat.jpeg
   Group: Platform_Logistics
      Launch_Date: 2003-01-12
      Launch_Site: Vandenberg Air Force Base, USA
      Design_Life: 3 years
      Primary_Sponsor: USA/NASA
   End_Group
End_Group
New Value=[Source: NASA ICESat home page]</skos:changeNote>
    <skos:changeNote>Group: Platform_Details
   Entry_ID: ICESAT
   Group: Platform_Identification
      Platform_Category: Earth Observation Satellites
      Short_Name: ICESAT
      Long_Name: Ice, Cloud and Land Elevation Satellite
   End_Group
   Group: Synonymous_Platform_Names
      Short_Name: ICESAT
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: GLAS
   End_Group
   Group: Orbit
      Orbit_Altitude: ~600 km
      Orbit_Inclination: 94 degrees
      Period: ~97 minutes
      Repeat_Cycle: 91 days with ~33 days subcycle
      Perigee: 593 km (368 mi)
      Apogee: 610 km (379 mi)
      Orbit_Type: LEO &gt; Low Earth Orbit &gt; Polar Non-Sun-Synchronous
   End_Group
   Creation_Date: 2007-04-16
   Online_Resource: https://icesat.gsfc.nasa.gov/
   Online_Resource: http://www.csr.utexas.edu/glas/atbd.html
   Group: Platform_Logistics
      Launch_Date: 2003-01-12
      Launch_Site: Vandenberg Air Force Base, USA
      Design_Life: 3 years
      Primary_Sponsor: USA/NASA
   End_Group
End_Group</skos:changeNote>
    <skos:definition xml:lang="en">[Source: NASA ICESat home page]ICESat (Ice, Cloud,and land Elevation Satellite) is the benchmark Earth Observing System mission for measuring ice sheet mass balance, cloud and aerosol heights, as well as land topography and vegetation characteristics. From 2003 to 2009, the ICESat mission provided multi-year elevation data needed to determine ice sheet mass balance as well as cloud property information, especially for stratospheric clouds common over polar areas. It also provided topography and vegetation data around the globe, in addition to the polar-specific coverage over the Greenland and Antarctic ice sheets.Group: Platform_Details   Entry_ID: ICESAT   Group: Platform_Identification      Platform_Category: Earth Observation Satellites      Short_Name: ICESAT      Long_Name: Ice, Cloud and Land Elevation Satellite   End_Group   Group: Synonymous_Platform_Names      Short_Name: ICESAT   End_Group   Group: Platform_Associated_Instruments      Short_Name: GLAS   End_Group   Group: Orbit      Orbit_Altitude: ~600 km      Orbit_Inclination: 94 degrees      Period: ~97 minutes      Repeat_Cycle: 91 days with ~33 days subcycle      Perigee: 593 km (368 mi)      Apogee: 610 km (379 mi)      Orbit_Type: LEO &gt; Low Earth Orbit &gt; Polar Non-Sun-Synchronous   End_Group   Creation_Date: 2007-04-16   Online_Resource: https://icesat.gsfc.nasa.gov/   Online_Resource: http://www.csr.utexas.edu/glas/atbd.html   Group: Platform_Logistics      Launch_Date: 2003-01-12      Launch_Site: Vandenberg Air Force Base, USA      Design_Life: 3 years      Primary_Sponsor: USA/NASA   End_GroupEnd_Group</skos:definition>
    <dcterms:modified>2025-10-08T17:31:10.223Z</dcterms:modified>
    <skos:inScheme rdf:resource="https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms"/>
    <gcmd:altLabel gcmd:text="ICESAT-1" xml:lang="en" gcmd:category="alternate"/>
    <gcmd:altLabel gcmd:text="Ice, Cloud and Land Elevation Satellite" xml:lang="en" gcmd:category="primary"/>
    <gcmd:hasInstrument rdf:resource="57463f12-2a21-49f9-9477-718030d34291"/>
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