空间目标地基观测红外辐射特性研究  

Infrared radiation characteristics of space target based on ground-based detector

作　　者：郑鸿儒 马岩[1] 张帅 陈亚涛 ZHENG Hong-ru;MA Yan;ZHANG Shuai;CHEN Ya-tao(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China;Chang Guang Satellite Technology Co.Ltd.,Changchun 130000,China;School of Astronautics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]长光卫星技术股份有限公司,吉林长春130000 [3]北京航空航天大学宇航学院,北京100191

出　　处：《中国光学（中英文）》2023年第6期1424-1432,共9页Chinese Optics

基　　金：国家自然科学基金重大项目重点课题(No.61890965)。

摘　　要：构建空间目标辐射特性对于发展空间态势感知技术具有重要意义。本文针对空间目标红外辐射特性,基于有限元方法,采用非结构四面体网格研制了仿真程序,通过矢量坐标变换,计算得到了目标各表面受到的轨道外热流,并结合表面材料和双向反射分布函数(BRDF)对目标各表面温度和红外辐射特性进行了仿真,并与文献结果进行了对比。进而考虑大气衰减和背景辐射的影响,对地基探测条件下升轨和降轨弧段的目标光谱辐射强度进行了分析。结果显示:对于三轴稳定太阳同步轨道沿飞行方向固定式帆板卫星,各表面在阳照区和地影区内温度变化范围较小;使用8~14μm长波波段对目标进行观测的效果比3~5μm中波波段好;辐射强度最大值在770 W/sr左右;地基红外光谱探测受大气影响较大,需要对探测波段进行优选。Constructing the radiation characteristics of space targets is of great significance for the development of space situational awareness technology.In this study,we aim to investigate the infrared radiation characteristics of space targets by developing a simulation program based on the finite element method and unstructured tetrahedral mesh.Through vector coordinate transformation,we calculate the orbit external heat flux received by each surface of the target.By combining the surface material properties and Bidirectional Reflection Distribution Function(BRDF),the temperature and infrared radiation characteristics of each target surface were simulated.Furthermore,we analyze the spectral radiation intensity of the target in the as-cending and descending orbital arcs under ground-based detection conditions,taking into account the effects of atmospheric attenuation and background radiation.The results show that,for a three-axis stabilized synchronous orbit satellite with solar panels fixed in the flight direction,the temperature variation range of each surface in the sunlight area and the shadow area is small.The detection effect of the long-wave band of 8~14μm is better than that of the medium-wave band of 3~5μm,and the maximum radiation intensity is about 770 W/sr.Ground-based infrared spectrum detection is more affected by the atmosphere,and the detection band must be optimally selected.

关 键 词：空间目标 红外光谱辐射 地基探测 轨道外热流 大气衰减 

分 类 号：O432.1[机械工程—光学工程]