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： 《光电工程》 2011年第9期6-12,共7页

摘　　要： 基于卫星的背景特性、材料特性、轨道特性及太阳帆板与卫星本体的相对运动特性,研究了在轨卫星的可见光反射特性。实验测量了三种卫星表面常用材料典型角度的双向反射分布函数,并构建了三种材料改进的SunBRDF模型。提出了一种单自由度运动的太阳帆板入射光线矢量计算方法。根据卫星的几何尺寸和表面材料特性,仿真获得了在轨卫星不同观测时刻的反射特性,包覆黄色热控材料和银色热控材料的本体及太阳帆板的反射强度峰值分别为6.91×104W/sr、6.42×104W/sr和9707W/sr。本体和帆板产生的三个峰值信号位于不同的空间位置。仿真结果表明,在轨运行的卫星反射特性受卫星表面材料、几何结构、姿态、轨道参数等因素的影响,且帆板反射特性在卫星整体反射特性计算中不可忽略。 Visible reflection characteristics of an on-orbit satellite were studied based on background radiation,surface material properties,orbit parameters,and the relative motion between satellite body and solar array.The Bidirectional Reflectance Distribution Functions（BRDF） of three common surface materials of satellite at typical angles were measured.An improved Sun BRDF model of three materials was established.The method for calculating the incident vector in the coordinate system of solar array with a single degree of freedom rotation was proposed.The satellite reflection characteristics were simulated by its given physical dimension and surface physical parameters.The peak radiant intensities reflected by the satellite bodies which were coated by yellow thermal control coating or silver thermal control coating and the solar array were 6.91×104 W/sr,6.42×104 W/sr and 9 707 W/sr,respectively.These peaks were in different space positions.The result shows that the reflection characteristics of satellite are affected by surface materials,physical dimension,attitude,orbital parameters and so on,as well as the solar array cannot be neglected when the satellite characteristics are analyzed.

关 键 词： 反射特性 双向反射分布函数 在轨卫星 太阳帆板

领　　域： [机械工程] [理学] [理学] [航空宇航科学与技术] [航空宇航科学技术]