空间目标在天基光学探测中的特性分析与仿真

分析了空间目标的分布及几何特性,研究了空间目标光学特性与天基探测系统、太阳以及目标自身参数的关系,提出了空间目标光学特性仿真的思路,建立的天基空间目标光学特性分析系统可以计算并绘制相对距离、太阳相位角及目标星等变化曲线.由于很难获取准确的空间目标实际光度数据,文中提出了对仿真结果的验证方法.通过对仿真结果的分析,得出了天基空间目标光学探测的特点,为天基光学探测和识别的研究提供了参考. 

Analysis and Simulation of Characteristics of Space Objects for Space-borne Optical Sensor

The characteristics of space objects are very important for the space-borne optical sen- sor.This paper analyzes the characteristics of distribution and geometry of the space objects,and summarizes the reflectivity of major materials used by satellite.Visible light scattering characteristic of the space objects are discussed specially.Firstly,solar radiation is calculated.Secondly,radiation luminescence calculation models of the two basic diffuse reflection surfaces of satellites are estab- lished.The simulation program of optical characteristic of space object is proposed.The simulation system of visible light scattering characteristic of space objects is set up.The simulation system can change the observation distance,photometric magnitude and the sun light phase at real time. Then two validate methods are derived for it is difficult to get real observation data.These validate methods are preferable methods for analyzing space-borne optical sensors.At last,the characteristics of space objects observed by space-borne optical sensor is depicted.This paper provides an effective reference to space-based observation system design.