Computer Science
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gbrp.reptr....k&link_type=abstract
In its Geodyn. Branch Res. Program 4 p (SEE N85-31688 20-46)
Computer Science
Error Analysis, Geoids, Geopotential, Gravitational Fields, Gravity Gradiometers, Satellite Perturbation, Covariance, Earth Crust, Earth Gravitation, Geomagnetism, Spaceborne Experiments
Scientific paper
The low frequency terms of the geopotential are observable from satellite perrturbations as viewed by a high orbiting satellite or satellites. To measure and map the fine structure of the Earth's gravity field could be accomplished by a Spaceborne Gravity Gradiometer Mission. Since a gradiometer measures second derivatives of the geopotential field, the gradiometer will be sensitive to the density variations of the earth's outer crust which is the source of the high frequency components of the Earth's gravity field. A gravity gradiometer mission would provide in situ measurements on a global scale of the Earth's gravity field fine structure. Covariance error analyses were performed which indicate that a spaceborne gravity gradiometer having a precision of .001 E to .0001 E in a circular/polar orbit and flown at altitudes 160 km to 200 km can determine the gravity field and geoid to accuracies of 1 to 3 mgal and 3 to 5 cm respectively, with a horizontal resolution of 50 km. The potential scientific information which could be derived from a Shuttle borne gradiometer is considered.
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