Propellant Depots - Propellant Depots are required in both earth and lunar orbit and have essentially the same cost. The lunar depot is charged with slight developmental modifications. Costs are based on MSFC inhouse studies. Satellite Solar Power Station - The station is seen as a significant development project. The cost is based on terrestrial power plants, impacted by the engineering needed to operate such a system in space and by the transportation and assembly of the 850,000 pound station. Automated Lunar Resource Satellites - The costs are based on Earth Resources Technology Satellite (ERTS) program costs, and include two flight units. Lunar Base/Permanent Lunar Colony - Costs include all automated mining machines, material conveyors, mineral dressing and refining equipment, mobility equipment, transport linear accelerator, power system, etc., as well as facilities for 200 men. Costs were adjusted from a 150 man NASA inhouse lunar mining base study as well as a MSFC funded 12 man lunar base study. Richness of ore data for the calculation of mining equipment requirements was taken from the Apollo program. It was assumed that with technology advancements, mineral dressing and refining could be accomplished at costs approaching those of similar terrestrial operations. Libration Point L5 Space Colony - These costs are for the additional efforts that would be required to establish the space colony. These costs include the L5 space bases, the design and engineering of the colony structure and systems, the materials required from earth for the fabrication of the colony, and the transportation of these elements (including inhabitants) to L5. Transportation - The vehicles are those needed to deliver all the elements to their required destinations. They include: First Generation STS Impact - Two additional orbiters and related equipment. Large Lift Vehicle - Integrated development and additional buys of first generation shuttle systems (main engines, HO tank, solid
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