Mission 11 - Assembly Transfer The objective of Mission 11 is to demonstrate transferring a fully assembled large structure from one orbit position to another, and testing the structural loads incurred by the operation. Figure 14-14 indicates the need for two Shuttle launches to deploy the transfer stages; mate them to the demonstration satellite; and checkout the interface for the actual transfer. 14. 2. 3 ORBITAL TEST FACILITY Sizing of the Orbital Test Facility (OTF) antenna described above came about from a consideration of the power densities desired both in the ionosphere and on the ground, with altitudes taken as 352 km (190 nmi) for assembly and 556 km (300 nmi) as a reasonable maximum for sustained operations. The relation for power density is We see that the radiated power x area product will be determined by the requirements for a given power density at a given distance, and that, given the maximum power available, the smallest antenna size is established. The de- sired peak power densities are 50 mW/cm for ionospheric tests and 20 mW/cm for ground level tests. The 144m x 144m antenna selected consists of 64 subarrays (18m x 18m) as shown in Figure 14-15. Of these 53 are active. The power densities achieved at various ranges are shown in Figure 14-16. The ionospheric nFH layer and
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