Physics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9431771d&link_type=abstract
Unknown
Physics
Artificial Satellites, Eccentricity, Elliptical Orbits, Equatorial Orbits, Gravitation, Gravitation Theory, Gravitational Effects, Orbit Calculation, Orbital Mechanics, Satellite Orbits, Universe, Oscillations, Perturbation, Phenomenology, Rotation
Scientific paper
As gravity is a long-range force, one might a priori expect the Universe's global matter distribution to select a preferred rest frame for local gravitational physics. At the post-Newtonian approximation, two parameters suffice to describe the phenomenology of preferred-frame effects. It is pointed out that the observation of particular orbits of artificial Earth satellites has the potential of improving the alpha sub 1 limits by a couple of orders of magnitude, thanks to the appearance of small divisors which enhance the corresponding preferred-frame effects. There is a discrete set of inclinations which lead to arbitrarily small divisors, while, among zero-inclination (equatorial) orbits, geostationary ones are near optimal. The main alpha sub 1 - induced effects are: (1) a complex secular evolution of the eccentricity vector of the orbit, describable as the vectorial sum of several independent rotations; and (2) a yearly oscillation in the longitude of the satellite.
Damour Thibault
Esposito-Farèse Gilles
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