Orbit The orbit is either low Earth orbit (LEO) to lunar orbit or LEO to some intermediate orbit. The purpose is to prove power beaming technology rather than having a specific orbit in mind. Thus, any orbit in between LEO and the Moon is acceptable. Time Scale and Deadline The time scale for this demonstration is not fixed but for the $800M demo, the 10-year limit must be met. Based on past studies and the available technology, ion propulsion and all other technologies can be available for this demo within the $800M limit. Cost Target for Early Demos Costing for task C will require a definition of the trajectory and the test duration. For a lunar mission with a 100-W power level, the cost may be up to $500M. References 1) Palaszewski, B. “Lunar Transfer Vehicle Design Issues Using Electric Propulsion Systems”, AIAA Paper, Monterey, California, July 1989 2) Palaszewski, B., Electric Propulsion for Lunar Exploration and Lunar base Development”, LBS-005, Houston, Texas, April 1988.
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