A Satellite Solar Power Station in the geosynchronous orbit, transmitting the generated energy by means of microwave radiation, is considered. The enormous technological problems involved and the economic aspects of such a project pointed out. It is concluded that the Satellite Solar Power Station concept will require major engineering development strides in several areas, but these strides represent plausible extrapolations of known technology. At the present the orbital power station appears to have approximately the same level of economic feasibility as large-scale solar terrestrial power plants.