Resonant dynamics of Medium Earth Orbits: space debris issues |
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Authors: | Alessandro Rossi |
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Institution: | (1) ISTI–CNR, Via Moruzzi 1, 56124 Pisa, Italy |
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Abstract: | 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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Keywords: | Orbital resonances Space debris Navigation constellations GPS-like orbits MEO orbits Disposal orbits |
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