作　　者： ; ; ;

机构地区： 哈尔滨工业大学航天学院空间光学工程研究中心

出　　处： 《光学技术》 2008年第5期750-753,757,共5页

摘　　要： 针对空间目标可见光反射特性提出了一种建模方法。双向反射分布函数(BRDF)可以有效地描述目标表面材料的空间反射特性和光谱特性。根据目标表面状况及背景辐射环境,选取合适的双向反射分布函数模型,利用辐射理论在可见光波段建立了空间目标反射特性的数学模型。基于轨道参数进行了仿真计算。计算结果表明太阳帆板与卫星主体相比,其在探测器入瞳处的辐照度只小一个数量级,在目标光学特性分析时不可忽略。而且,空间目标反射特性不仅与太阳、地球和目标三者之间的实时位置有关,还与其几何形状、表面材料等有关。仿真分析结果验证了建模的正确性。 A modeling method is presented based on visible reflection characteristics of space targets. Bidirectional reflection distribution function （BRDF） can describe spatial reflection characteristics and spectral characteristics of target surface material effectively. According to surface appearance of space targets and background radiation environment, a mathematical model on reflection characteristics of space targets in visible band is built in terms of radiation theory by appropriate models of BRDF. A simulation calculation is made based on orbital parameters. The calculation results indicate that the solar sail can not be neglected when the optical characteristics of the target are analyzed because its irradiance on the entrance pupil of the detector is only one order less than that of the target body. Reflection characteristics of space targets have the relation with the real-time position of the sun, the earth and the target, as well as with its geometrical shape and surface material and so on. Simulation results proved the model is correct.

关 键 词： 空间光学 反射特性 双向反射分布函数 空间目标 建模

领　　域： [机械工程] [理学] [理学] [机械工程] [理学] [理学]