卫星的光散射建模研究

Light scatter modeling of satellites

目标光散射特性理论建模研究是空间目标光学特性研究的重要组成部分。对于卫星等复杂空间目标,进行光散射建模计算的关键点和难点是解决复杂目标不同部件之间的遮挡关系和光线在目标内部的再次散射问题。通过对已有方法的比较,依据光线跟踪算法并结合蒙特卡罗法思想给出了更为有效和快速的建模计算方法,并把该方法运用到对某卫星光散射特性理论建模中,给出了该卫星在太阳光照下的光散射亮度图像。

The theoretical modeling of target light scatter is an important part of optical signature of space targets, The key and difficulty of the modeling is how to solve the problem that different parts of the complex target occlude each other and light scatters in the target. Having studied many approaches and compared them, a more efficient and faster approach is given, which comes from the idea of ray-tracing and Monte-Carlo method. Finally the approach is applied to one satellite＇s light scatter modeling, and light scatter luminance image in the sunshine is presented.