https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.6 2026-03-19T10:41:57.720Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments/b60ab284-6cac-4389-ae78-c601100030e7 2018-04-19 POSEIDON-3B Date=2018-04-19 User Id=mmorahan Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=Poseidon-3B [b60ab284-6cac-4389-ae78-c601100030e7,367547] - Radar Altimeters [92ddaaca-40b2-4936-bc1a-28cc5743e8b8,347963] Date=2018-04-19 User Id=mmorahan Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: Poseidon-3B Altimeter language code: en Date=2018-04-19 User Id=mmorahan Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: funded by EUMETSAT and of Poseidon-2 heritage (built by Thales Alenia Space). The Poseidon-3B dual-frequency (5.3 and 13.6 GHz) nadir-looking radar altimeter continues to be the key instrument in this spaceborne observation program. The objective is to map the topography of the sea surface for calculating ocean surface current velocity and to measure ocean wave height and wind speed. Poseidon-3 has a measurement precision identical to its predecessor Poseidon-2. language code: en Date=2018-04-19 User Id=mmorahan Entity=PrefLabel Operation=UPDATE Field=text User Note=Rename Concept System Note=update PrefLabel Old Value=Poseidon-3B New Value=POSEIDON-3B funded by EUMETSAT and of Poseidon-2 heritage (built by Thales Alenia Space). The Poseidon-3B dual-frequency (5.3 and 13.6 GHz) nadir-looking radar altimeter continues to be the key instrument in this spaceborne observation program. The objective is to map the topography of the sea surface for calculating ocean surface current velocity and to measure ocean wave height and wind speed. Poseidon-3 has a measurement precision identical to its predecessor Poseidon-2. 2018-04-19 12:23:15.0