空间目标视星等曲线仿真  

Simulation of Apparent Magnitude Curves of Space Objects

作　　者：刘燕 汶德胜[3] 易红伟[3] 殷勤业[2] LIU Yan;WEN Desheng;YI Hongwei;YIN Qinye(Xi’an Mingde Institute of Technology,Xi’an 710124;School of Electronics and Information,Xi’an Jiaotong University,Xi’an 710049;Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119)

机构地区：[1]西安明德理工学院,西安710124 [2]西安交通大学电子与信息工程学院,西安710049 [3]中国科学院西安光学精密机械研究所,西安710119

出　　处：《空间科学学报》2022年第3期485-491,共7页Chinese Journal of Space Science

基　　金：国家自然科学基金项目(61427811);中国科学院青年创新促进会基金项目(1188000111)共同资助。

摘　　要：人类航天活动日益频繁,空间目标种类和数量不断增多,识别未知空间目标的关键特征具有重要的科学价值。本文通过辅助图形软件建模分割,获取球体、圆锥体和圆柱体带法向量的面元坐标;基于卫星仿真工具包,得到了目标轨道及位置参数,并结合双向反射分布函数各向异性Phong模型和四元数姿态更新模型,完成了地基观测条件下4种形状空间目标的视星等仿真。仿真结果表明,目标受空间位置、形状和姿态的影响程度不同,其光度曲线具有各自特点。球体由于形状完全中心对称,光度曲线主要受空间位置的影响;圆锥体、正方体、圆柱体光度曲线的波形受形状影响较大,曲线走向受位置影响较大,波动频率受姿态角速率影响较大。通过统计分析相关数据,可为后续空间目标位置、姿态和形状的反演提供先验模型。With the increasing frequency of human space activities and the increasing variety and number of space targets,it is of great scientific value to identify the key features of unknown space targets.By segmentation using auxiliary graphics software,the surface coordinates of sphere,cone and cylinder with a normal vector are built.Based on the satellite simulation toolkit,the target orbit and position parameters are obtained.Combining with isotropic Phong BRDF model and attitude quaternion update model,the apparent magnitudes of these four shape space targets under ground observation conditions are simulated.Simulation results show that the target is affected by the spatial position,shape and attitude in different degrees,and each light curve has its own characteristics.Because the sphere is completely centrosymmetric,the light curve is mainly affected by the space position.Light curve waveforms of the cone,cube and cylinder are mainly influenced by shape,the curve trends are mainly influenced by position,and wave frequencies are mainly influenced by attitude angular rate.By statistical analysis of the data,a prior model can be provided for the subsequent inversion of space target position,attitude and shape.

关 键 词：双向反射分布函数 各向异性Phong模型 视星等 光度曲线 

分 类 号：V19[航空宇航科学与技术—人机与环境工程] V556.5