Abstract
This paper focuses on a new problem in determining flight opportunities for a shuttle vehicle consistent with the constraint of departure from and arrival at existing station orbits at both the Earth and moon. Results are obtained which demonstrate the possibility of achieving good round trip mission characteristics on either two or three month cycles which require near minimum energy trajectories, reasonable transit times, reasonable lunar stay times, and which are consistent with envisioned lunar traffic requirements. Moreover, several important conclusions are reached which are critical to the design parameters of the Earth and lunar station orbits. Finally, a typical mission plan is presented showing how the results of this paper may be used for establishing nominal shuttle mission scheduling.
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