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.

• 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。