The calculated heat delivered to the PCU for the reference system for the 370 km orbit with the lowest insolation (longest eclipse, end of live performance and minimum solar intensity) is shown in Figure 6 as a typical example. The 10 % variation around the required value of 95 kWth is considered as being acceptable. A reduction of this variation would result in an unacceptable mass penalty. Influence of the Orbit Altitude on the Reference System With the assumptions made the only orbit parameter influencing the power system is the maximum eclipse time, i.e. the orbit altitude. The receiver's mass and Space Power: Resources, Manufacturing and Development
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