SSPS DEVELOPMENT PROGRAM The SSPS development program can be divided into three phases, as shown in Figure 11. During the first phase, the development of technology to meet performance and cost goals will proceed and the technology will be verified to provide data on the performance of components and subcomponents under expected operating conditions. The technology verification activities can be done on Earth, being supplemented only by those space experiments needed to provide data on specific system and component functions, potential interactions of the microwave beam with the ionosphere, and microwave frequency and beam power densities as they relate to biological effects criteria. FIGURE 11 SSPS DEVELOPMENT PROGRAM PHASING The critical technology developments will be concerned with: • Improvements in photovoltaic conversion - including fabrication of solar cells; • The design of solar arrays and the performance analysis of large structures;
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