Figure A-2. Economic comparison of a 5000 MW SPS operating over the period 1995-2025 with terrestrial fossil fuel plants. 1. Additional engineering studies of the current configuration focusing in the following areas: a. Orbital system structures b. Control and station keeping analysis c. Flight mechanics and orbit transfer stresses. 2. An analysis of alternative program plans focusing on the economics of low Earth orbit and geosynchronous orbit test satellites. 3. An identification of critical issues and technologies relevant to the construction and operation of a photovoltaic STS.
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