d/ Modified ground based facilities such as at Arecibo are best suited to determine the effects on the lower ionosphere of high microwave power densities. e. Technology development is needed in not only the ’’critical” areas but in essentially all MPTS areas in order to support a progressive program to demonstrate readiness to proceed to significant scale for a pilot plant or prototype. f. Rough order of magnitude costs are $318M for critical technology development, and $96M for the geosatellite, and to accomplish all identified objectives $3052M for the sorties and orbital test facility. 1. 2. 5 ADDITIONAL STUDIES Recommendations for early further in-depth studies complementing the technology development programs are: a. Analyze transient thermal effects on the transmitting antenna structure, waveguide and electronics as it passes in and out of eclipse to determine impact on controllability and materials selection. b. Analyze power beam ionospheric effects to estimate impact on other users and provide a detail model for phase front control simulation. c. Model closed loop phase front control to better estimate error budget and performance under transient conditions. d. Determine special requirements for multiple ( 100) stations relating to spacing in orbit and on the ground, control, frequency selection and interference. e. Detail alternate uses and intermediate benefits of MPTS and potential impact on its design and development. f . Investigate ways of reducing transportation and assembly costs by a better (higher level of detail) synthesis of launch vehicle, assembly and equipment technologies. 1. 3 REPORT APPROACH AND ORGANIZATION This report presents the final results and the techniques leading to those results that evolved through the course of the study. There is no deliberate attempt to present a chronological record or documentation of the evolution through intermediate steps, except where it might serve a useful tutorial function.
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