Physics
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981itaes..17..511f&link_type=abstract
IEEE Transactions on Aerospace and Electronic Systems, vol. AES-17, July 1981, p. 511-519.
Physics
Accelerometers, Equivalence, Gravimeters, Gravitational Fields, Spacecraft Instruments, Inertia, Tensor Analysis
Scientific paper
According to the principle of equivalence, it is always possible at a point in space-time to transform to a (in general accelerated) coordinate system such that the effects of gravity will disappear over a differential region in the neighborhood of the point. Attention is given to inertial fields, the gravitational field, a differential inertial sensor, a differential gravitational sensor, the rotational properties of tensors, and a rotating nonuniform gradient sensor. By designing sensors that take force measurements over an extended region of space and using sensor rotation to modulate the forces induced in the sensor, it is possible to measure independently the effects of acceleration, rotation, and gravitation by frequency filtering. The application of this basic principle to instrument design should lead to the development of rugged, sensitive devices for use on spacecraft for attitude control, on orbiters to measure the gravity fields of the earth, moon, and planets, and on deep space probes to measure the mass and mass distribution of asteroids.
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