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|Origin:||B6.1. Presented at SPS'91 1991|
In this paper the author argues that it is now possible to reduce the cost of transportation from earth to low Earth Orbit by about 2 orders of magnitude. He explains why costs have been high until now, why these can be reduced dramatically, and what is now being done in America to do this. He concludes that this development, alone, should greatly improve the prospects of deploying economically viable solar power satellites (SPS) and other space-based systems.