Attitude Control and Stationkeeping ($19.3B). The attitude control and stationkeeping element costs include cost of the propulsion assembly consisting of electric thrusters and propellant storage, power conditioning unit, earth sensors, sun sensors and inertial platform. The DDT&E costs were based on DDT&E CER's; electric thrusters at $30,000/cm ($76,200/in), propellant storage at $3,638/kg ($l,650/lb), power conditioning unit at $8,818/kg ($4,000/lb), earth sensors at $32,253/kg ($14,630/lb), sun sensors at $73,302/kg ($33,250/lb) and inertial platform at $47,471/kg ($21,533/lb). The production costs were based upon TFU CER's; thrusters at $124,545/unit, propellant storage at $l,830/kg ($830/lb), power conditioning unit at $l,323/kg ($600/lb) , earth sensors at $ll,455/kg ($5,196/lb), sun sensors at $16,142/kg ($7,322/lb) and inertial platform $30,747/kg ($13,947/lb). The attitude control and stationkeeping costs are 2.3 percent of the total program cost and 8.4 percent of the satellite cost. Ground Support Equipment and System Test and Evaluation ($25.0B). The ground support equipment element costs include cost of deliverable electrical, mechanical and servici.ng-type ground-based equipment required to check out, maintain, and care for the satellite subsystems. Costs include design, development, production and testing of hardware, equipment, simulators and tools used to construct, inspect, transport, hoist, overhaul, repair, assemble, disassemble and service the satellite subsystems. The DDT&E costs and the production costs were calculated as a percentage factor of the satellite TFU costs (DDT&E at 100.0 percent and production at 4.0 percent.) Systems test and evaluation element costs include cost of development and qualification tests such as, structural, thermal, antenna and systems verification tests and production acceptance tests. These costs were calculated as a percentage factor of the satellite TFU (DDT&E at 60 percent and production acceptance tests at 5 percent). The GSE and systems test and evaluation costs are 2.9 percent of the total program cost and 10.9 percent of the satellite cost. Ground Support Systems ($435.8B) The ground support systems element costs include cost of the rectenna, ground facilities, logistics, and launch support. Cost of the ground support systems elements totals $435.8B or 51.3 percent of the total program costs. The following sections provide additional cost data for each of the ground support systems elements. Rectenna ($148.6B). The rectenna element costs include the cost of site acquisition and activation, rectenna elements, ground base feedback control, utility interface. The DDT&E costs were assumed to be the equivalent cost of two rectenna TFU costs. The production costs were based upon TFU CER's; site at $0.65/m^ ($0.06/sq.ft), rectenna elements at $21/m2 ($1.95/sq.ft) , ground base feedback control at $93/kw, and utility interface at $0.476B each. The rectenna costs are 17.5 percent of the total program cost and 34.1 percent of the ground support systems cost. Facilities ($17.6B). The facilities element costs, include cost of facilities for ground-based manufacturing, test, launch, and tracking and master control. The DDT&E costs and the production costs were calculated as a percentage factor of the satellite TFU cost (DDT&E at 50 percent and production at 8.0 percent). It may be pointed out that the launch facilities
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