Fig. 10. Proposals for medium ierm SPS study programme in Eure the conclusion that this potential power generation option for Western Europe should be investigated with increased efforts to learn more about its future impacts and general feasibility. Solar power satellites currently represent the only real longterm alternative to fusion reactors and should at least deserve a similar attention. REFERENCES 1. P.Q. Collins, Feasibility of Siting SPS Rectenna Systems Over the Sea. 1EE — Colloquium on SPS. London, 1979. 2. DOE/NASA, SPS — Program Review. 1979. 3. D. Kassing. The SPS-Concept and Its General Implications for Europe, IEE — Colloquium on SPS, London, 1979. 4. J. Ruth and W. Westphal, Study on European Aspects of Solar Power Satellites, Vol. 1: Final Report. ESA Contract no: 3705/78, 1979. 5. M. Trella and K.K. Reinhartz. European Aspects of Solar SPS, Conference on Energy and Aerospace, London, 1978. 6. W. Westphal and J. Ruth, Conditions and Requirements for a Potential Application of Solar Power Satellites (SPS) for Europe. 16th European Space Symposium, Stresa, 1979.
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