大气层内全天时星敏感器成像模型仿真与影响因素分析  

Simulation and analysis of influencing factors for the imaging model of all-time star sensor in the atmosphere

作　　者：杨康 孙婷[1] 邢飞[2] 吴思瑶 YANG Kang;SUN Ting;XING Fei;WU Siyao(School of Instrument Science and Optoelectronic Engineering,Beijing Information Science and Technology University,Beijing 100192,China;Department of Precision Instruments,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京信息科技大学仪器科学与光电工程学院,北京100192 [2]清华大学精密仪器系,北京100084

出　　处：《光学技术》2024年第6期676-685,共10页Optical Technique

基　　金：国家自然科学基金(62375022);光电测量与智能感知中关村开放实验室与北京控制工程研究所空间光电测量与感知实验室开放基金资助(LabSOMP-2022-02)。

摘　　要：全天时星敏感器在大气层内进行观测任务时,难以避免受到大气的影响。为了深入研究全天时星敏感器白昼观星困难的原因,需要对全天时星敏感器在成像过程中所受到的大气影响进行分析。利用MODTRAN软件对大气的干扰进行仿真计算,对不同观测条件下大气的影响进行了研究,并得到大气对全天时星敏感器成像影响的计算模型。研究结果显示,选择合适的光谱范围有利于全天时星敏感器的白昼观星任务。结合黑体辐射定律、恒星星等和恒星光谱型等信息,对恒星辐射的计算进行了修正,建立了恒星目标光谱辐射计算模型。最后,利用得到的大气影响的计算模型和修正后的恒星目标光谱辐射计算模型,并结合相关探测参数,进行仿真信噪比和仿真星图的计算。通过将仿真结果与实际实验结果进行对比,验证了所提出模型的正确性。It's difficult for all-time star sensor to avoid being affected by the atmosphere when conducting observation missions in the atmosphere.In order to conduct in-depth research on the reasons that make it difficult for all-time star sensor to observe stars during the day,it is necessary to analyze the atmospheric impact on the all-day star sensors during the imaging process.Utilizing MODTRAN software for simulating atmospheric interference,a comprehensive study was conducted on the atmospheric effects under different observational conditions,resulting in the development of a computational model for the atmospheric impact on all-time star sensor imaging.The research results show that selecting an appropriate spectral range is beneficial for daytime star observation tasks of all day star sensors.Based on the blackbody radiation law,constellations,and stellar spectral types,the calculation of stellar radiation has been revised,and a stellar target spectral radiation calculation model has been established.Finally,using the obtained atmospheric impact calculation model and the modified stellar target spectral radiation calculation model,combined with relevant detection parameters,the simulation signal-to-noise ratio and simulation star map are calculated.The correctness of the proposed model was verified by comparing the simulation results with actual experimental results.

关 键 词：全天时星敏感器 光谱波段 大气干扰 仿真软件 

分 类 号：V448.253[航空宇航科学与技术—飞行器设计]