will be needed to integrate all operations in orbit. This facility will provide a communications capability to construction base elements, other satellites, transportation systems, and major ground facilities network. Centralization for overall mission and operations control for the construction base and its interfaces is a key element in the organization of the base. Mission and operation control will include activities such as transportation and docking control, construction activity scheduling, consumables management, safety operations, laser alinement, and mission logistics. The physical combination of the management facility with the logistics facility is likely. 5. Crew habitability facilities.- Crew habitability facilities consist of a number of elements —the habitation module, subsystems module, and power module. The habitation modules will provide a shirt-sleeve environment for personnel at the eight major worksites. The subsystem modules will contain the necessary subsystems for support and operation of the construction base. C. Construction Operations The configuration of the SPS and the sequence of construction will generally define the requirements for the construction base. Construction operations will drive the configuration of the construction base. The financial advantages of a short construction time will interact with the launch rate to define the construction schedule and the construction facility. Guidelines used in developing a staffing plan are as follows. 1. Each construction base in geosynchronous Earth orbit (GEO) will have an autonomous organization unto itself. 2. All modules needed to construct an SPS will be resident and attached to the structure. 3. Nominal construction operations will consist of three shifts, 24 hours/day. 4. There will be four crews to provide for maintenance and off duty time. 5. The crew stay time on orbit will be 180 days. 6. There will be cross training. 7. Construction crews will live at their worksite. An operational schematic for a construction base is shown in figure V-8. From the schematic and construction sequence are developed the numbers of machines, the number of operations, and the personnel requirements. All estimates were based on the "nominal" size configuration, which has a solar array area of 142 km (see fig. IV-7). These estimates for a "nominal" size configuration have also been used for the 2 2 "minimum" (96 km ) and "maximum" (183 km ) sized arrays in other sections of the report. Later studies will obviously have to evaluate the effect of array size on crew requirements.
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