1997 Mankins NASA SPS Fresh Look

This MEO constellation involves 63 SunTower SPS (or comparable system approaches) provides the same improvement in start-up costs when compared to GEO approaches, and has the added advantage of greater revenues and increase IRR due to the larger constellation. The 63 SimTower SPS system analyzed yielded an investment-to-first power requirement less than 6% of that in the updated 1979 Reference presented in Case 1 ($17 B versus more than $250 B) and about 10% that of the GEO SolarDisc approach (Case 4). As in other MEO cases, Case 17 allows a global market to be served from the first year of operations, as compared to the GEO cases in which only a single site market can be served initially (or possibly a regional market in the case of the SolarDisc). The results of the case runs from IAAM are summarized in the following tables 6-4 through 6-10.

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