Detailed Description of Base Case Technology The base case technology is designed to produce solar power satellites. Lunar soil is mined and beneficiated on the Moon and then launched into space by a lunar mass driver. Finally, the lunar materials are refined and processed into useful products in Earth orbit. The underlying assumptions are as follows: Capital Final capital mass — 100,000 tons Space production ratio — 0.85 Process capital — $11,000/ton Energy production — 14 tons/MW on the Moon — 10 tons/MW in space — $6000/ton Expendables Space production ratio — 0.3 Replacement parts — $11,000/ton Personnel support — 0.01 tons per man/day — $3000/ton Personnel — 100% overhead — 4 shifts/year (2 crews times 2 rotations) — $100,000/year wage Output and Related Expendables Revenue — $100,000/year/ton SPS
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