Very low thrust station-keeping for low Earth orbiting satellites |
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Institution: | CS GROUP France, 6 rue Brindejonc des Moulinais, 31506 Toulouse Cedex 5, France |
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Abstract: | Traditional station-keeping for Earth observation satellites with chemical thrusters generally involves maneuvers every couple months that are able to change significantly the semi-major axis and the inclination. These strategies do not scale down to very low thrust level (a few hundreds of μN) electrical thrusters. This paper presents both in-plane and out-of-plane strategies that spread corrections over very long arcs and discretize them to tiny maneuvers every couple orbits, taking into account mission-constraints on maneuvers locations. These strategies scale up to medium thrust strategies, filling the gap between propulsion technologies. The out-of-plane strategy although features a new no-deadband property and controls the full orbital momentum. All strategies allow control very close to the reference (a few hundreds meters in osculating parameters) and very low cost. |
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Keywords: | Station-keeping Low-thrust Low Earth Orbiting (LEO) Sun synchronous Ground-track grid |
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