The space transportation system and future communications satellites

An historical account is given of the development of communications satellites, with a view to the establishment of growth trends on which the further growth capability expected with the Space Shuttle's operation as a satellite launcher can be projected. While during the 1970s expendable launch vehicles could lift payloads of only about 2000 lbs, at a launch cost of $25,000/lb, the Space Shuttle will handle satellites weighing up to 12,000 lbs at approximately $12,000/lb. Attention is given to the design features and projected capabilities of the Orbital Transfer Vehicle (OTV), by which large payloads can be lifted to high orbits, and to the manned Space Operations Center (SOC,), which will be employed for the assembly of the satellite to be deployed as well as of the OTV, and the production and storage of its propellants. The SOC is expected to further reduce launch costs to about $5,000.