Satellite motion around an oblate planet: A perturbation solution for all orbital parameters

Mathematics

Scientific paper

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Artificial Satellites, Equations Of Motion, Oblate Spheroids, Orbit Calculation, Perturbation, Prediction Analysis Techniques, Satellite Orbits, Apogees, Perigees, Radii

Scientific paper

The search for a universal solution of the equations of motion for a satellite orbiting an oblate planet is a subject that has merited great interest because of its theoretical and practical implications. Here, a complete first-order perturbation solution, including the effects of the J2 terms in the planet's potential, is given in terms of standard orbital parameters. The simple formulas provide a fast method for predicting satellite orbits that is more accurate than the two-body formulas. These predictions are shown to agree well with those of a completely numerical code and with actual satellite data. Also, in an appendix, it is rigorously proven that a satellite having negative mechanical energy remains for all time within a spherical annulus with radii approximately equal to the perigee and apogee of its initial osculating ellipse.

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