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Abstract
The incidence irradiance of sunlight radiation is connected with scattering luminance of the object by the bi-directional reflectance distribution function (BRDF), combining the geometry modeling and the orbit theory, the scattering radiation of space dynamic objects are calculated at different observation stations and different time. The sunlight irradiance and background radiations at different time are calculated with Modtran code. The affections of different observation stations for object light scattering characters are discussed. Also the space correlations are discussed. And the best observation time and location can be obtained by analyzing the condition of visibility.