Relative motion of the geodynamic twin-satellite

Astronomy and Astrophysics – Astronomy

Scientific paper

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Geodynamics, Geopotential Research Mission, Gravimetry, Laser Altimeters, Planetary Gravitation, Thematic Mapping, Celestial Mechanics, Satellite Orbits

Scientific paper

The use of twin passive-laser-reflector satellites to improve the longer-wavelength accuracy of earth-gravity-field models, proposed by Klokocnik (1985), is examined theoretically. The effects of different gravitational and nongravitational forces on the twin satellites (created by separation from a single passive satellite after 1 yr or more in stable orbit) are analyzed, and numerical results are presented in graphs. It is shown that the twins can be kept within 20 km if the separation velocity is small (0.03-0.3 m/s) and perpendicular to the orbital plane.

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