SPACE POWER Volume 11, Number 1, 1992 Stephen L. Gillett & David L. Kuck. Extraterrestrial Resources: Implications From Terrestrial Experience 3 Raymond S. Leonard. The Environmental Benefits of Solar Power Satellites^ 17 William C. Brown. Experimental Radiation Cooled Magnetrons for Space Uset 27 Roger H. Bezdek & Robert M. Wendling. Impact of the Space Program on the U.S. Economy: National and State Analyses 43 V.A. Vanke, A.A. Zaporozhets & A. V. Rachnikov. Antenna Synthesis for the SPS Microwave Power Transmission System! 67 A.A. Zaporozhets. Illumination Tapers Synthesis for Adaptive Microwave Power Transmission Systems with Variable Distance Between the Antennas 81 Erratum to table of contents of Vol. 10 (3/4). All papers in the previous issue save those by Landis and by Potter & Kadiramangalam were presented at Power from Space ’91 in Gif-Sur-Yvette in August 1991. t Also presented at Power from Space ‘91, held in Gif-Sur-Yvette, France, August 1991.
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