Effect of Reflected Light at Nighttime. The irradiances from SPS at nighttime are shown in Table 3. With the exception of the worst case geometry with the OTV in LEO the max- imum nighttime irradiance is 0.01 W/m2 for 2-3 seconds. From the data of Everett et al. (8) shown in Fig. 3, it can be calculated that with this level of irradiation, approximately 0.5$ of PFR would be formed. Assuming that not all of the light is absorbed, this value of 0.5$ represents far more PFR than could be expected following 2-3 seconds of irradiation at
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