______________Table 11.10 Transportation Segment Costs__________ Looking at Table 11.10 it can be noticed that the most important costs are those related to HLLV. The total recurring costs of HLLV subsystem are $897B which is the 82% of all the cost of the Transportation segment. This shows that for this solar power design the HLLV costs are the principle costs in this segment. Reduction in costs for this vehicles would have a significant effect on the total segment cost. However the Space transportation chapter has described that the HLLV costs are already estimated to be very low in the NASA/DOE study. The results of the sensitivity analysis of the HLLV system are shown in Figure 11.3. Figure 11.3 Sensitivity Analysis of HLLV Costs in Transportation Segment. Ground Receiving Station This segment includes all the facilities and equipment required to convert the microwave beam received from Space into power, which is ready to connect into the power grid. According to NASA/DOE study the split costs of this element are shown in Table 11.11. It can be noticed that the main cost drivers are the rectenna structure and power collection. The recurring costs of the rectenna are $473B which is 41% of the cost of the ground receiving system. The recurring costs of power collection are $342B which is 30% of the ground segment cost.
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