The CW microwave frequency and power densities to be investigated are rather well established. Effects to be anticipated in the sites yet to be selected are functions of ambient condition and the life forms peculiar to the region and those that are in transit. Most certainly areas like the desert southwest of the U.S. would be leading contenders so that effects on plants and animals should be investigated. Detailed investigations building on those conducted for more general purposes must be conducted to assure complete understanding of long term and transient effects and to provide the basis for securing national and international agreement on frequency allocations, intensities, and exposure limits. Development risk rating should be 4. Control of antenna pointing conceived to be accomplished by mechanical action between the antenna and main mast as well as between the ends of the main mast and the solar array primary structure in the vicinity of the slip rings. These are very large members, of light weight construction, having to transmit unprecedented power across the relative motion interfaces, to operate in the space environment, with high reliability & safety, at low cost, packaged for high density earth launch, deployed or assembled in space, for a very long time with limited operations & maintenance attention. The actuators to establish the motion, the moving joints and the moving or flexing conductors are the largest and most complex machinery employed in the photovoltaic powered station and will be the subject of most critical operations & maintenance analyses in order to design the machinery to be essentially maintenance-free. Nevertheless it must be designed to permit maintenance under most adverse conditions of damage and environment. Development risk rating should be 4.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==