Error analyses for a gravity gradiometer mission
Abstract
This paper addresses the usefulness of an orbiting gravity gradiometer as a sensor for mapping the fine structure of the earth gravity field. The exact knowledge of this field is essential for studies of the solid earth and the dynamics of the oceans. Although the earth gravity tensor, measured by a gradiometer assembly, has nine components, only five components are independent. This latter fact is as a consequence of the symmetry and conservative nature of the earth's gravity field. The most dominant component is the radial one. The error analyses considered here are therefore based only upon a single axis gradiometer sensing this radial component. The expected global gravity and geoid errors for a 50 x 50km (1/2 x 1/2 deg) area utilizing a spaceborne gradiometer with a precision of 0.001 EU in a 160km circular polar orbit are about 3 mGAL and 5 cm, respectively.
 Publication:

IEEE Transactions on Geoscience and Remote Sensing
 Pub Date:
 July 1985
 DOI:
 10.1109/TGRS.1985.289445
 Bibcode:
 1985ITGRS..23..527K
 Keywords:

 Celestial Geodesy;
 Error Analysis;
 Geopotential;
 Gravitational Fields;
 Gravity Gradiometers;
 Accuracy;
 Geoids;
 Gravity Anomalies;
 Polar Orbits;
 Spacecraft Instrumentation