Rectenna capital — $45,000/ton SPS Rectenna expendables — $1350/year/ton SPS (only output-related expendable) Transportation Cargo — $1 million/ton into orbit (this assumes 1980's projected costs for operation of the space transportation system from Earth to LEO) Personnel — $2 million/ton onto the Moon (This assumes availability of lunar oxygen in LEO. The costs would be approximately 2 times greater for all propellant supplied from Earth.) — One man = 0.085 ton Vehicle — $250 million/Shuttle — Three-week turn around time — 30 tons/flight — $6000/ton Discount Rate — 10% APPENDIX 2. BASE CASE TECHNOLOGY Input Parameters for Computer Program A = 1.0 B = 1.0 C = 1.0 F = $l,421,000/ton expendable G = $l,173,000/ton capital Pl (fleet cost) = $555,555/ton per year transport capability P2 (revenues) = $1,000,000,000,000 P3 (fixed R&D costs) = $150,000,000,000 P4 (R&D bias) = $0/ton RATE = 1.1 RHO = 2.55 tons output per year/ton capital RM(m) = 0.30 tons expendables from lunar soil/ton expendables RN(n) = 0.85 tons capital from lunar soil/ton capital WANT (SMF mass) = 100,000 tons Z = 0.1545 tons expendables per year/ton capital
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