M4. Demonstrate, at geosynchronous altitude, satisfactory functioning and performing of the high voltage elements as they interact with the plasma and other appropriate elements. M5. Verify, through a learning process, that the proposed design, processes and procedures including assembly, operations and maintenance, for the operational equipment are such that progressively estimated costs and schedules can be attained. b. Highly Desirable Hl. Determine the nature of the effects of and on the critical portion of the ionosphere nF" layer (250 to 300 km) that might be experienced by the microwave power beam, associated references and controls. Determine effects that might apply to HF communications systems. Investigate the power density range of 20 to 50 milliwatts/cm . Determine effects that might apply to the pilot beam. Determine the nature of possible rf noise and harmonics induced by the ionosphere. H2. Determine the effects of the 20 to 50 mW/cm microwave power beam on the critical portion of the ionosphere HDH layer (70 km). In particular determine effects on existing or contemplated VLF navigation systems such as Omega and DORAN. H3. Determine the effects of thermal cycling of the structure, waveguides and phase control components. H4. Assess the critical elements that contribute to orbital operations life limitations. H5. Establish a building block from which the prototype should be developed. c. Desirable DI. Demonstrate acquisition, lock-on pointing and focusing of the microwave beam from low orbit and demonstrate control as limited in the environment experienced from low orbit. D2. Demonstrate microwave power transmission from low orbit to a ground rectifying antenna with a goal of efficiency, dc on orbit to dc
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