Orbits and Propagators - AGI
Orbits and Propagators - AGI
Orbits and Propagators - AGI
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Diseño de Vehículos Espaciales 1DVE1‐T07‐54STK <strong>Propagators</strong>• Main propagators to use are:– J 2 Perturbation (1st Order) LEO•The J 2 Perturbation (first‐order) propagator accounts for variations inthe orbital elements due to Earth oblateness.•Does not model atmospheric drag•Does not model solar or lunar gravity– J 4 Perturbation (2nd Order) LEO•The J 4 propagator includes the 1st & 2 nd order effects of J 2• Includes the 1st order effects of J 4•J 4 is approximately 1000 times smaller than J 2• Little difference between orbits propagated with J 2 <strong>and</strong> J 4
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