https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/139b0dae-27bb-42bd-8027-81fb9fd8f85d SEA ICE ELEVATION Date=2024-10-03 User Id=tstevens Entity=Definition Operation=UPDATE Field=reference System Note=update Definition Old Value=See "http://icesat4.gsfc.nasa.gov/" for more information on sea ice elevation measurements from IceSat. New Value=See "http://icesat4.gsfc.nasa.gov/" for more information on sea ice elevation measurements from IceSat. Date=2024-10-03 User Id=tstevens Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 6e2f1371-05b1-41db-a6d9-bccd7cc2b3da relationship type: null relationship value: null generated by: null Date=2024-10-03 User Id=tstevens Entity=Definition Operation=UPDATE Field=text System Note=update Definition Old Value=Pertains to the measurement of the surface height of the sea ice. In particular, sea ice elevation is measured by the radar altimeter on board the NASA IceSat satellite. New Value=Pertains to the measurement of the surface height of the sea ice. In particular, sea ice elevation is measured by the radar altimeter on board the NASA IceSat satellite. Pertains to the measurement of the surface height of the sea ice. Inparticular, sea ice elevation is measured by the radar altimeter on board theNASA IceSat satellite. 2024-10-03 09:36:28.0