Orbital tests of relativistic gravity using artificial satellites

Details Orbital tests of relativistic gravity using artificial satellites Orbital tests of relativistic gravity using artificial satellites

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9519377d&link_type=abstract

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Computer Science

Numerical Analysis

Earth Orbits, Gravitation, Numerical Analysis, Relativistic Effects, Relativistic Theory, Artificial Satellites, Drag Reduction, Perturbation, Scalers, Time Constant

Scientific paper

We reexamine non-Einsteinian effects observable in the orbital motion of low-orbit artificial Earth satellites. Our analysis suggests that such data could measure two independent combinations of the Eddington parameters bar-beta identically equal to beta - 1 and bar-gamma identically equal to gamma - 1 at the 10(exp -4) level and probe the time variability of Newton's 'constant' at the (G dot)/G approximately 10(exp -13)/yr level. These tests would provide well-needed complements to the results of the Lunar Laser Ranging experiment, and of the presently planned experiments aiming at measuring gamma bar. In view of the strong demands they make on the level of non-gravitational perturbations, these tests might require a dedicated mission consisting of an optimized passive drag-free satellite.

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