Perspectives on Satellite Solar Power

Abstract

The potential for solar energy conversion is reviewed and the rationale for solar energy conversion in geosynchronous orbit is outlined. The evolution of the concept of the Satellite Solar Power Station (SSPS) is presented and the technology options for converting solar energy in space, transmitting microwave power and converting it on earth are summarized. The development of the design concept of the SSPS based on photovoltaic and solar thermal conversion is examined and salient characteristics are provided. The details of microwave power generation, beam transmission, and conversion to DC at the receiving antenna on earth are discussed. The requirements for a space transportation system, orbital construction and assembly, maintenance and operations are reviewed. The environmental impacts of SSPS operations, such as stratospheric pollution by space vehicle exhaust products and of the microwave beam, including atmospheric attenuation and scattering, ionospheric propagation, and microwave biological effects, are highlighted. Economic and social issues are considered. Development programs for the SSPS are outlined; critical technology areas are listed and the potential contributions of the SSPS to meet future energy demands and the industrialization of space are projected.