SPS 2000 Concept: Low cost near-term demonstration project for space solar power. Key Features: Low Cost Solar Cells Civil Engineering Philosophy Robotic Deployment of modules Cost Target $10/Watt (per 1991 original paper) Suggestor/Source: Professor Makoto Nagatomo et al., Institute for Space and Astronautical Sciences (ISAS) Discussion Tliis design was developed as a study project by the Institute for Space and Astronautical Sciences as a means of considering early hands-on experimentation with space solar power. For practical reasons, the orbit chosen is a 0 degree inclination (equatorial) low Earth orbit. Dr. Makoto Nagatomo of ISAS suggests that this project be thought of as a civil engineering project, meaning that low cost and long life are much more important than high efficiency and high technology. References 1. Nagatomo, M.. and Kiyohiko I., An evolutionary satellite power system for international demonstration in developing nations, SPS 91, Paris, 1991. 2. Nagatomo, M., Sasaki, S and Naruo, Y., Conceptual Study of a Solar power Satellite SPS 2000 19th International Symposium on Space Technology and Science, Yokohama, Japan May 15-24, 1994. 3. SPS Working Group Home Page at ISAS: http://spss.isas.ac.jp Advantages Disadvantages Simple gravity gradient stabilization Addresses interesting utility interface issues low power levels and intermittent delivery inefficient use of PV mass
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