h. Dominant cost factors for SPS are the power source and transportation. i. As a guide, the power source parameters should not exceed the combination of 350 $/kW with 1.0 kg/kW or possibly 250 $/kW with 1. 5 kg/kW where the power is as delivered to the transmitting antenna. j. As a guide, transportation and orbital assembly should not exceed 200 S/kg. k. As a guide, build and deploy cycle for SPS should not exceed three years to limit interest charges. 1. For the aluminum-amplitron configuration, near optimum transmitting antenna and receiving antenna sizes are 0. 9 km and 10 km, respectively, and transmitting antenna weight is about 6x10^ kg. REFERENCES 12-1. Crane, IEEE Proceedings, Vol, 59, page 173, February, 1971.
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