Global gravity survey by an orbiting gravity gradiometer

Details Global gravity survey by an orbiting gravity gradiometer Global gravity survey by an orbiting gravity gradiometer

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988eostr..69.1601p&link_type=abstract

EOS (ISSN 0096-3941), vol. 69, Nov. 29, 1988, p. 1601, 1610, 1611. Research supported by the U.S. Army and USAF.

Other

3

Earth Gravitation, Gravimetry, Gravity Anomalies, Gravity Gradiometers, Geopotential Research Mission, Gravitational Fields, Gravity Probe B, Hubble Space Telescope

Scientific paper

The scientific aims, design, and mission profile of the Superconducting Gravity Gradiometer Mission (SGGM), a NASA spacecraft mission proposed for the late 1990s, are discussed and illustrated with drawings and diagrams. SGGM would complement the two other planned gravimetry missions, GRM and Aristoteles, and would provide gravitational-field measurements with accuracy 2-3 mGal in 55 x 55-km blocks. The principal instruments are a (1) three-axis superconducting gravity gradiometer with intrinsic sensitivity 100 microeotvos/sq rt Hz, (2) a six-axis superconducting accelerometer with sensitivity 100 fg(E)/sq rt Hz linear and 10 prad/sec squared sq rt Hz angular, and (3) a six-axis shaker for active control of the platform. Consideration is given to the error budget and platform requirements, the orbit selection criteria, and the spacecraft design.

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