航天TDI CCD双线阵相机动态成像光线几何建模  

Space TDI CCD Double Array Camera Light Dynamic Imaging Geometry Modeling

作　　者：杨飞[1,2,3] 曲宏松[1,2] 金光[1,2] 谢金华[4] 邱振戈[5] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]小卫星技术国家地方联合工程研究中心,长春130033 [3]中国科学院大学,北京100049 [4]国家测绘地理信息局卫星测绘应用中心,北京100830 [5]上海海洋大学,上海201306

出　　处：《光电工程》2015年第2期41-46,共6页Opto-Electronic Engineering

基　　金：微小型航天器技术国防重点学科实验室开放基金资助(HIT.KLOF.MST.201304)

摘　　要：建立精确的光线几何模型,推导地物与影像间的正反算公式是航天TDI CCD(时间延迟积分电荷耦合器件)相机动态成像仿真的关键步骤。立体测绘卫星全链路仿真以光线追迹为主线,以高精度高分辨力地表物理模型为输入源,综合考虑了大气辐射传输、光学系统成像、探测器光谱响应和相机噪声等各个环节,完成了成像过程端到端的完整分析。以可见光光学遥感相机为例,在考虑轨道进动、地球在惯性系下的岁差章动和TDI CCD拼接的情况下,完成双线阵相机动态成像光线追迹几何建模,并对模型误差源进行分析。经实验验证与分析,正视相机几何物理模型定位精度达124 m,前视相机定位精度达193 m,满足立体测绘全链路仿真的几何建模要求。Establishing accurate light geometry model, feature and image between the positive and negative calculate formula is derived, which is the key steps of space TDI CCD （charge-coupled device） time delay integral camera dynamic imaging simulation. Stereo mapping satellite link simulation based on ray tracing all the main line, with high precision high resolution surface physical model for the input source, considering the atmospheric radiation transmission, optical system imaging spectral response, detectors and camera noise and so on each link, complete the imaging process end-to-end complete analysis. In visible light optical remote sensing camera, for example, considering the precession of orbit, the earth under the inertial system of precession and nutation TDI CCD stitching, under the condition of complete double array camera ray tracing dynamic imaging geometry modeling, and the model error sources are analyzed. Verified by experiment and analysis, physical model to face the camera geometry precision of 124 m, forward-looking camera positioning accuracy of 193 m, double line array camera is high precision, which satisfies the requirement of the geometrical model of three-dimensional mapping all link simulation.

关 键 词：几何模型 动态成像 双线阵 误差分析 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]