云场景下天基红外探测可用度快速评估  

Fast evaluation of space-based infrared detection availability in cloud backgrounds

作　　者：赵家庆 丁翔 薛永宏[1] 徐忠超 李泽亚 张磊[1] 樊士伟[1] 刘荣科[3] ZHAO Jia-Qing;DING Xiang;XUE Yong-Hong;XU Zhong-Chao;LI Ze-Ya;ZHANG Lei;FAN Shi-Wei;LIU Rong-Ke(Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China;Shanghai Aerospace Electronic Technology Research Institute,Shanghai 201109,China;Beihang University,Beijing 100191,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]上海航天电子技术研究所,上海201109 [3]北京航空航天大学,北京100191

出　　处：《红外与毫米波学报》2023年第3期418-425,共8页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金(62004122)。

摘　　要：天基红外探测场景下,云的存在会对目标探测造成严重干扰,导致无法连续检测跟踪目标,降低系统探测效能。系统在凝视工作模式下,背景在一段时间周期内变化较小,可根据背景特性建模分析不同云场景下探测系统的可用度。将理论分析、图像仿真、解析建模等多种手段相结合,对云场景下天基红外探测可用度进行快速评估。首先通过对目标穿越云层时的信杂比变化进行分析,建立可用度的初步估计模型,确定可用度的影响因素。然后在图像仿真和解析建模中,基于仿真结果拟合了信杂比低于阈值图像帧数跟云参数之间的线性关系,并结合参数物理含义建立可用度解析模型,采用回归分析法确定模型系数。最后基于新的仿真工况对比天基红外探测可用度的仿真值、初步估计值和解析预测值,验证模型的准确性和鲁棒性,该模型可作为系统可用度效能评估的有益参考。In space-based infrared detecting backgrounds,the presence of clouds would cause serious interference to target detection,making it impossible to continuously detect and track targets and reducing the system's detecting efficiency.For space-based detecting systems operating in starring mode,the background changes little over a period.It is feasible to analyze the detection system efficiency based on modeling background characteristics.Theoretical analysis,image simulation and analytical modeling methods are used together to perform a fast evaluation of space-based infrared platform availability under complex cloud backgrounds.Firstly,a preliminary evaluation model of space-based detection availability is established through analysis of the signal to clutter ratio when the target is crossing clouds.Factors influencing the detecting availability are determined through analysis.Then,a linear relationship is given between the frame numbers of losing parameters of the target and cloud based on simulated results.A theoretical model of availability is built up by analyzing the physical meaning of each parameter and the coefficient values are determined by regression analysis.Finally,the space-based detecting availabilities of the simulation,preliminary evaluation model,and theoretical model are compared under new simulating conditions,which verifies the correctness and robustness of the theoretical.The model in this work could be used as a reference value for evaluating the space-based optical detection system's availability.

关 键 词：天基红外探测 云场景 信杂比 可用度 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]