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The eccentricity growth phenomenon for MEO navigation satellites.

Authors :
Legnaro, Edoardo
Source :
Acta Astronautica. Jun2024, Vol. 219, p896-905. 10p.
Publication Year :
2024

Abstract

Lunisolar resonances shape the dynamics in the MEO region and have the effect of increasing an object's eccentricity possibly up to a value so high that the orbit's perigee reaches the atmosphere and friction determines the re-entry. The focus of this paper is the eccentricity growth phenomenon observed for navigation satellites. In particular, starting from a secular Hamiltonian model, analytical estimates for the maximum eccentricity reachable along an inclination-only dependent lunisolar resonance are derived as a function of the initial inclination. Also, trajectories that minimize an object's lifetime are studied, and analytical estimates for such a minimum lifetime are provided as a function of the initial eccentricity of the object. In addition, lifetime cartography maps are presented in the plane of the argument of perigee and the longitude of the ascending node. • Analytical estimates for the maximum eccentricity along lunisolar resonances. • Analytic formulae of minimum satellite lifetime at GPS and Galileo altitudes. • Litetime maps at GPS and Galileo altitudes in (ω)-(Ω) plane. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00945765
Volume :
219
Database :
Academic Search Index
Journal :
Acta Astronautica
Publication Type :
Academic Journal
Accession number :
177316911
Full Text :
https://doi.org/10.1016/j.actaastro.2024.03.058