一种机载面阵摆扫成像视轴路径规划与重叠率计算的新方法  

A new method for LOS path planning and overlap rate setting of airborne area-array whisk-broom imaging

作　　者：王崇儒 韩贵丞[1] 金祥博 刘军[1] 周成林[1] 王跃明[1,2,3] WANG Chong-Ru;HANG Gui-Cheng;JIN Xiang-Bo;LIU Jun;ZHOU Cheng-Lin;WANG Yue-Ming(Key Laboratory of Space Active Opto-Electronics Technology,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing,100049,China;Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou,310024,China)

机构地区：[1]中国科学院上海技术物理研究所,空间主动光电技术重点实验室,上海200083 [2]中国科学院大学,北京100049 [3]国科大杭州高等研究院,浙江杭州310024

出　　处：《红外与毫米波学报》2023年第3期383-390,共8页Journal of Infrared and Millimeter Waves

基　　金：上海市产业协同创新基金(HCXBCY-2021-001)。

摘　　要：机载面阵摆扫式成像系统需要足够高的帧间重叠率来避免因扫描过程中视轴的控制误差而导致的漏扫,这制约了成像系统在大速高比条件下的适应能力,限制了系统的成像幅宽。论文提出了一种视轴路径规划模型与重叠率计算的新方法,通过像球面投影的几何分析方法优化设计了成像系统视轴的扫描路径,并依据像球面中像面投影的方位旋转角度,建立了一种重叠率计算的新模型。经理论分析与仿真实验验证,在40°侧向凝视成像时,视轴稳定精度由2.93°提高到0.15°,相同速高比、单行5帧摆扫成像时,作业效率提高约32%。论文研究工作对推动机载摆扫成像技术向着宽视场、大速高比、高分辨率方向的进一步发展具有重要意义。Airborne area array whisk-broom imaging systems require a high enough overlap rate between frames to avoid missed scans caused by the control error of the line of sight(LOS)during the scanning process,which restricts the imaging system's adaptability under conditions of high speed height ratio,and limits the imaging swath of the system.This paper proposes a new method of LOS path planning model and overlap rate calculation.The scanning path of the LOS of the imaging system is optimal designed through the geometric analysis method of the image spherical projection,and based on the azimuth rotation angle of the image plane projection in the image sphere,a new model for overlap rate calculation is developed.Theoretical analysis and simulation experiments have verified that the stabilization accuracy of the LOS is increased from 2.93°to 0.15°when the lateral gaze imaging is performed at 40°,and the operation efficiency is increased by about 32%when the same speed height ratio and single-line 5-frame whisk-broom imaging are performed.The research work of this thesis is of great significance to promote the further development of airborne whisk-broom imaging technology toward the direction of wide field of view,high speed height ratio,and high resolution.

关 键 词：航空遥感 摆扫成像 像移 重叠率 视轴稳定 

分 类 号：P237[天文地球—摄影测量与遥感]