1997 Mankins NASA SPS Fresh Look

Case 13: LEO-Based SunTower (72 Satellites). The LEO-Based, 3.6 GW power output. Sun Tower was found to be sensitive to changes in the ETO costs. Case 13, potentially as a result of ETO cost factors, was similarly found to be quite sensitive to reductions below about 5 years for space segment refurbishment, but to be relatively insensitive changes above 10 years. Figures 6-31 through 6-34 which follow, provide the details of Case 13 sensitivities to the variations in ETO Transportation Costs as summarized above. figure 6-31IRR Sensitivity to ETO Cost

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