In the continental gravity compilations (1986–1995), available marine gravity surveys were patchy and resulted in an ever growing reliance on satellite altimeter-derived gravity data. The early satellite work by Haxby (Lamont Doherty Geological Observatory) encouraged Getech to get involved in its own processing of these data using repeat mission data. In the second half of the 1990s, after the main continental compilations had been completed, Geosat and European remote-sensing (ERS-1) geodetic-mission data became available with combined track spacing of 3 to 4 km at the equator.

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