FIGURE 3.1 SPS DEMONSTRATION SATELLITE IN FINAL PHASES OF CONSTRUCTION (SOURCE: ROCKWELL INTERNATIONAL) and power distribution losses, power to the microwave antenna will be approximately 285 MW. Microwave transmission losses further reduce this value to about 230 MW at the rectenna, resulting in recovery of 8 MW of power for a sparsely populated 7-km-diameter demonstration rectenna or 2 MW of power for a 1.75-km demonstration rectenna. The demonstration satellite is a single unit or bay of the operational SPS which consists of 30 such bays as shown in Figure 3.2. A list of the basic items which comprise the demonstration satellite and their related DDT&E and first unit costs are summarized in Table 3.1. The mass properties of the full-scale and demonstration satellites are summarized in Table 3.2. Because of the large investment in the demonstration satellite and the associated transportation costs and the on-orbit capability that will exist, there is
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