Microwave Power Transmission Studies Vol4 of 4

on ground, in excess of 50 percent. The goal should be to achieve momentary- power transfer, under conditions that assure beam pointing and focusing, converted on the ground by a large rectenna in the high power region of the main lobe and analytical integration based on small distributed rectenna outputs representing the low power regions. The orbital test program has been conservatively defined in that the scope is broad and the quantities of equipments with the associated missions are large with respect to the detailed orbital test requirements of the microwave power transmission system. The technology points of the orbital test objectives can be largely implemented in a thoroughly defined ground program; however, a flight test program is considered important to bring to focus the integrated elements, particularly when it is recognized that significant orbital assembly if not manufacturing will be involved. Equipment technology associated with assembly, operations and maintenance must be developed which is closely related to the projected operational equipments and situations. The quantities of equipments deemed appropriate for the orbital test program are at this time uncertain. Further in-depth investigations should be conducted from which the quantities and scope should be progressively revised. In particular, those objectives associated with the high power microwave beam effects on the ionosphere warrant in-depth investigation and independent assessment. This should be done before accepting them as requirements that will play a major role in formulating the orbital test program. 14. 2 IMPLEMENTATION The quantities and scope of the following defined orbital test program are conservative for the microwave power transmission equipments, and the power source as well as transportation system orbital test objectives are beyond the scope of this investigation. To be consistent with the intent of the full breadth requirement for this study, the following orbital test program is therefore presented as being representative of scope with the resulting cost and schedule implications.

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