G - I
type: Concept

GRAVSAT
type: Concept
definition: GRAVSAT provides gravity survey information for the offshore oil and gas exploration industry. Based on the analysis of radar altimetry from the ERS-1 Geodetic Phase, completed in March 1995, high resolution gravity information is derived from the along track sea surface slopes measured by the satellite. At the equator, tracks are approximately 8km apart, reducing to 4km at 60 degrees of latitude, thus providing similar sampling to many conventional ship surveys. GRAVSAT gravity anomaly data have been validated against ship measurements over several areas of the United Kingdom Continental Shelf, for which the British Geological Survey have comprehensive datasets.
in scheme: projects