Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cemda.100..267r&link_type=abstract
Celestial Mechanics and Dynamical Astronomy, Volume 100, Issue 4, pp.267-286
Astronomy and Astrophysics
Astronomy
4
Orbital Resonances, Space Debris, Navigation Constellations, Gps-Like Orbits, Meo Orbits, Disposal Orbits
Scientific paper
The Medium Earth Orbit region is the home of the navigation constellations. It is shown how the orbits of these constellations of satellites are strongly affected by the so-called inclination dependent luni-solar resonances. The analytical theory of these resonances is recalled and a large set of numerical integrations is used to investigate the stability of the orbits of the constellations over very long time spans. The stability issue is important in the definition of possible disposal strategies for the constellation spacecraft, after their end-of-life. Two possible disposal strategies are envisaged involving either stable or unstable orbits (from the eccentricity growth point of view). In particular it is shown how, to have disposal orbits with moderately short lifetime (of the orders of 40-50 years), a very large disposal maneuver would be required to rise the inital eccentricity to values above ~ 0.3.
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