Assuming a Lambertian surface, CASE D4: OTV BETWEEN LEO AND GEO As the OTV spirals out to GEO it can reflect light back to the earth with geometry similar to that in Case D3. Consider orbits at 2 and 4 earth radii with corresponding values of R = 11,000 km and 24,700 km, respectively. Using the other parameters of Case D3 the corresponding irradiances are _7 o 9
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