completely implemented while the rest will be partially implemented. Multiple subarrays integrated into a functional phased array will be required to approach full implementation. Figure K-9 illustrates how configurations A, B, C, and D could be incorporated into a test bed subarray in such a manner as to create progressive buildup of amplitrons and waveguides into higher density configurations to achieve a representative thermal environment for the centrally located amplitrons and waveguides. It also illustrates how the same test bed could have sufficient remaining clear areas for control and support equipment. A total of 147 amplitrons is suggested to build the power level up to that associated with a low power density subarray. This would provide for relatively complete implementation of objective Ml. K.4 DEFINING AN MPTS ORBITAL TEST FACILITY PROGRAM This section was prepared to develop the more complete configuration for an orbital test facility based primarily on the implementation of objective Hl requiring high power density irradiation of the nF" layer of the ionosphere. Although further detailed study and testing is required to confirm this objective, it is considered sufficiently important at this time to form the basis for a first approximation of the orbital test facility MPTS configuration. It, along with the ground test program, the geosynchronous satellite and the upgraded Arecibo facility, would completely implement the currently defined objectives. K. 4. 1 ASSUMPTIONS a. On orbit facility will have dc power available for generation of rf power in a progressive build-up to a maximum of 15 MW to the rf transmitter. This is assumed to: 1. Be required for power source development and demonstration purposes. 2. Be available in steps as required for rf systems development and demonstration purposes. 3. Be available for other orbital operations in a continuing program such as orbital manufacturing, communications, sensing, and mapping.
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