https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 24.9 2026-09-30T10:52:06.201Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments/a3ce2cfb-5488-4301-83c2-64bbc090c397 Laser Ranging Date=2024-12-06 User Id=tstevens Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: An Instrument that measures the phase of the laser interferometer signal from the photoreceiver as representative of fluctuations in the separation between the two orbiters, provides control of the laser frequency, and commands the steering mirror angle and implements the search to establish the optical link. language code: en Date=2023-03-16 User Id=sritz Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=Laser Ranging [a3ce2cfb-5488-4301-83c2-64bbc090c397,1238838] - Riegl LD90-3100VHS-FLP [4d3b9c87-39ca-423a-82d7-1ee2bf8d01e9,1246977] Date=2019-09-09 User Id=sritz Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=Laser Ranging [a3ce2cfb-5488-4301-83c2-64bbc090c397,348161] - GRACE-FO LRI [9cf060b8-d8ea-46c4-a8de-f2073df5d0ae,369129] An Instrument that measures the phase of the laser interferometer signal from the photoreceiver as representative of fluctuations in the separation between the two orbiters, provides control of the laser frequency, and commands the steering mirror angle and implements the search to establish the optical link. 2024-12-06 10:02:36.0