Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Space Solar Power Exploratory Research and Technology program (SERT) program, conducted by NASA, was initiated by John Mankins and led by Joe Howell in March 1999. It was to develop a solar power satellite (SPS) concept for a future gigawatt space power systems to provide electrical power by converting the Sun's energy and beaming it to the Earth's surface. It was also to provide a developmental path to solutions for current space power architectures. Subject to studies it proposed an inflatable photovoltaic gossamer structure with concentrator lenses or solar dynamic engines to convert solar flux into electricity. The initial program looked at systems in sun-synchronous orbit, but by the end of the program, most of the analysis looked at geosynchronous orbit.
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