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<title>AAS 98-130</title><body BGCOLOR="ffffff"> <h2>AAS 98-130</h2> <h2>SEARCHING FOR REPEATING GROUND TRACK ORBITS: A SYSTEMATIC APPROACH</h2> <h4>M. Lara - Real Instituto y Observatorio de la Armada, Spain</h4> <h2> Abstract </h2> For the zonal part of the earth artificial satellite problem, families of periodic orbits are computed in a synodic reference frame. A systematic procedure for finding periodic orbits at any inclination is described. The solutions found in this way repeat exactly their ground track on the surface of the earth and are a very good start for further refinements including other perturbations. A practical application is provided. <P><A HREF="http://www.space-flight.org/AAS_meetings/1998_winter/sessions.html">Back</A>