空间目标的光散射研究

从太阳辐射理论出发，介绍了漫反射目标的地面光照度计算公式。在高斯随机面元统计散射模型的基础上，提出了目标表面为随机粗糙平板面的空间目标散射太阳光产生地面光照度的散射计算模型。利用该模型计算了风云一号卫星的地面光照度，并与把卫星表面看作朗伯表面计算得到的地面光照度进行了比较。结果表明，把卫星表面看作漫散射体得到的地面照度值要比把卫星表面看作随机粗糙表面得到的地面照度值大。

Light Scattering of Spatial Target

In this paper, starting from the basic radiation theory, calculation formulation for ground irradiance of space diffuse reflection target is presented. Then based on the Gauss random facets statistical scattering physical model, the calculation model for Gauss random surface of spatial objects that is made from planes is derived. The ground irradiance of FY-1 satellite is calculation by using it. Finally, a comparison for the calculation results with those obtained with the Lambertian reflection Law is given. The simulation results show that, the ground irradiance of FY - 1 satellite surface that is considered diffuse reflection is lager than that of FY-1 satellite surface that is considered random rough scattering.