||Satellite mission>Earth observation
||National Aeronautics and Space Administration (NASA)
||GEOS was a US National Geodetic Satellite Program (NGSP). The NASA mission initiative of three spacecraft was of a study nature to test tracking system behavior experimentally and to unify the world's tracking datums to the 5-10 m level of uncertainty with respect to the geocenter. In this context the GEOS acronym has two definitions, 1) Geodetic Earth Orbiting Satellite, and 2) Geodynamics Experimental Ocean Satellite.
||Mission Fact Sheet
Oceans & coasts
General Earth observation