Operational halo orbit maintenance technique for SOHO

Statistics – Computation

Scientific paper

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Soho Mission, Spacecraft Control, Stationkeeping, Three Body Problem, Control Stability, Control Theory, Libration, Orbital Mechanics, Orbits

Scientific paper

Orbits in the proximity of the L1 and L2 libration points of systems similar to the ones of the Earth-Sun or the one of the Earth-Moon are discussed. The method of orbit maintenance proposed in the feasibility study of the SOHO mission is presented. This method is based on the computation of a reference orbit by solving a simple constrained minimization problem. This orbit has a very small residual acceleration and can be used as the reference orbit for a control of the spacecraft by linear-quadratic control theory. This type of control minimizes the maneuvers used for orbit maintenance and stabilizes the operational orbit as well. The simplicity, robustness, and flexibility of the method make it very well suited for direct appliction in the operational flight dynamics software for the control of the SOHO mission.

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