7. "Solar Power Satellite System Definition Study - Part I," Boeing Aerospace Corporation, DI80-20689, Contract NAS9-15196, June 1977 (N78- 13099 through 13103). 8. "Solar Power Satellite System Definition Study - Part II," Boeing Aerospace Corporation, D180-22876, Contract NAS9-15196, December 1977 (N78- 20156 through 20163). 9. "Solar Power Satellite System Definition Study - Part III," Boeing Aerospace Corporation, D180-24071, Contract NAS9-15196, March 1978 (N78-20164). 10. "Solar Power Satellite Concept Evaluation," Johnson Space Center, JSC-12973, July 1977 (N78-12116). 11. "Satellite Power Systems (SPS) Concept Definition Study," Rockwell International Corporation, SD78-AP-0023, Contract NAS8-32475, April 1978. Other Concepts 12. Ehricke, Krafft A., "The Power Relay Satellite: A Means of Global Energy Transmission Through Space," Rockwell International Corporation, Report E74- 3-1, March 1974. 13. "Application of Stationkept Array Concepts to Satellite Solar Power Station Design," Aerospace Corporation, ATR-76(7575)-l, Contract NAS8-31842, November 1976 (X77-10236 through 10238 (GC)). 14. Billman, K. W., W. P. Gilbreath and S. W. Bowen, "Introductory Assessment of Orbiting Reflectors for Terrestrial Power Generation," Ames Research Center, TMX-73230, April 1977 (X77-73872 (N)). Orbit Characteristics 15. "Orbital Motion of the Solar Power Satellite," Otis F. Graf, Jr., Analytical and Computational Mathematics, Inc., ACM-TR-105, Contract NAS9-15171, May 1977 (N78-15148). Power Conversion 16. "To Design Variable Orientation Solar Concentrators for Space Applications," University of Georgia, Contract NAS8-31565, October 1975 (X76-72006 through 72009 (N)).
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