ment costs can be amortized within a reasonable time period. Conclusion The safety, reliability, and cost-efficiency of satellite power systems are all interrelated. A reliable and safe system will be less likely to incur extra costs because of slowdowns or shutdowns. Large investments occuring early in the development phase may be offset by increases in system reliability and safety. These increases would help the systems achieve their full economic potential. Reliability, safety, and cost-efficiency are not the only issues in the SPS program. But they are important areas to examine, and a systemic approach can be a valuable tool. Resources AIAA Position Paper, Solar Power Satellites, As t ronaut i cs & Aeronautics, Vol. 17, No. 1, January 1979, pp. 14-17. Barna, Becky. Wanted: Space in Space. DATAMATION, Vol. 25, No. 10, September 1979, pp. 87-89. Glaser, Peter E. The Outlook for Solar Power Satellites. Paper presented at The Council for Energy Studies Conference on World Energy Economics IV, London, England, February, 1979Grey, Jerry. Testimony before Subcommittees on Advanced Energy Technologies and Energy Conservation Research, Development, and Demonstration and Space Science and Applications; Committee on Science and Technology; U.S. House of Representatives; Ninety-fifth Congress, Second Session, April 12, 1978. (No. 68). Manson, Simon. Personal Communication, January 24, 1980. (Manager, Satellite Power Sytem Program, NASA, Washington D.C.) Thorsheim, Howard I. General Systems Theory: A Logic-0f-Inquiry For Alternate Human Futures. Paper presented at the 24th Annual Meetings of the Society of General Systems Research, meeting with the American Association for the Advancement of Science, San Francisco, January 1980. Toren, Brian K. The Meaning of General Systems Theory. System T rends , 2(3), 1980, pp. 3- 4.
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