Operational Logic: An operational schematic for a construction base (column/cable) is shown in figure V-C-2 where the materials are delivered from LEO to GEO to the logistics facility and eventually transported to the worksites in order to perform the construction functions . Construction Sequence: Figures V-C-3 and V-C-4 show the comparison of the column/cable and truss SPS configurations construction sequence over a 12-month work period including the major milestones of structure fabrication, solar cell blankets and concentrator sheets, and antenna construction. From the operational schematic and construction sequence are developed the numbers of machines, the number of operations, and the personnel requirements. Equipment Requirements: Table V-C-2 tabulates the construction equipment requirements comparing the column/cable and truss configurations. The truss configuration requires twice as many beam building machines but less manned manipulators with all other equipment requirements quite similar. Manpower Requirements: A very preliminary assessment of manpower needed to staff this organization indicated that approximately 150 persons were needed to man the construction, operations, and manufacturing portions of the job. Manpower requirements to staff the support area pushed the total on-orbit population to an estimated 228 persons as reflected in table V-C-3. Continuing refinements were made to the organizational and staffing requirements as more definitive information was developed with respect to configuration and construction techniques.
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