capabilities in large space structures, space-based construction, manned LEO and GEO facilities, and so on. These capabilities infer such space-based activities as space manufacturing, the utilization of large applications platforms, lunar exploration and exploitation, and physics and astronomy. The above space-based activities lead to identification of the following potential salvage uses: Demonstration Satellite • Growth into full-scale SPS satellite (Rockwell International reference program plan, applicable only if the demonstration is successful) • Use as a source of power for other space activities such as GEO platforms, a manufacturing base or an electric orbit transfer vehicle • Use as a power supply for a laser space transportation system • Use as a source of raw material. Full-Scale SPS Satellites • Use as spares and materials for other SPS satellites • Use as a power supply and platform for other space activities such as platforms, a manufacturing base, a lunar base or space habitats • Use as. a power supply for laser transportation systems including geocentric space, especially LEO to GEO, earth escape and aircraft on oceanic routes • Use as a power supply to recover Amor and Apollo asteriods • Use as a power supply for a high-energy, high-vacuum physics laboratory in space. Next, the salvage value of the SPS satellites was estimated for most of the above potential uses. In all cases the salvage value is taken to be the present value of the cost savings afforded by the salvage use referenced to the initial operation date of the salvaged article. The discount rate used throughout this study is a real (i.e., inflationary effects removed) rate of 4 percent. Thus, the salvage values presented represent the effective amount by which the capital cost
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