Department of Energy: SPS Brightness Due to Reflected Sunlight

2 To get the maximum total area the solar array area (1.56 km with direction cosine +1 from Table 1) is added to the maximum area with direction cosine in a single direction for the SB. The latter (Table 1) with direction cosine -2 2 +1, is the sum of the lateral beam area 1.98 x 10 km and the attached -2 2 2 equipment area 4 x 10 km . Thus a = 1.62 km and the diffuse irradiance c 2 is 2.4 x 10 0 W/m . CASE D2: SPS IN GEO, DIFFUSE CASE CASE D3: OTV POWERED IN LEO After an OTV is constructed, its solar panels are turned toward the sun to supply thruster power. One geometry of concern is that shown in Figure 24 in which light is reflected to the night side of the earth (after some atmospheric refraction). Assume the following parameters:

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