Imaging simulation and analysis of attitude jitter effect on topographic mapping for lunar orbiter stereo optical cameras  

月球轨道器立体光学相机姿态颤振对地形测绘影响的成像仿真分析

作　　者：CHEN Chen TONG Xiao-Hua LIU Shi-Jie YE Zhen HUANG Chao-Wei WU Hao ZHANG Han 陈晨;童小华;刘世杰;叶真;黄朝围;吴昊;张晗(同济大学测绘与地理信息学院,上海200092;同济大学上海市航天测绘遥感与空间探测重点实验室,上海200092;上海卫星工程研究所,上海200240)

机构地区：[1]College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China [2]Shanghai Key Laboratory for Planetary Mapping and Remote Sensing for Deep Space Exploration,Tongji University,Shanghai 200092,China [3]Shanghai Satellite Engineering Research Institute,Shanghai 200240,China

出　　处：《红外与毫米波学报》2024年第5期722-730,共9页Journal of Infrared and Millimeter Waves

基　　金：Supported by the National Natural Science Foundation of China(42221002,42171432);Shanghai Municipal Science and Technology Major Project(2021SHZDZX0100);the Fundamental Research Funds for the Central Universities.

摘　　要：The geometric accuracy of topographic mapping with high-resolution remote sensing images is inevita-bly affected by the orbiter attitude jitter.Therefore,it is necessary to conduct preliminary research on the stereo mapping camera equipped on lunar orbiter before launching.In this work,an imaging simulation method consid-ering the attitude jitter is presented.The impact analysis of different attitude jitter on terrain undulation is conduct-ed by simulating jitter at three attitude angles,respectively.The proposed simulation method is based on the rigor-ous sensor model,using the lunar digital elevation model(DEM)and orthoimage as reference data.The orbit and attitude of the lunar stereo mapping camera are simulated while considering the attitude jitter.Two-dimensional simulated stereo images are generated according to the position and attitude of the orbiter in a given orbit.Experi-mental analyses were conducted by the DEM with the simulated stereo image.The simulation imaging results demonstrate that the proposed method can ensure imaging efficiency without losing the accuracy of topographic mapping.The effect of attitude jitter on the stereo mapping accuracy of the simulated images was analyzed through a DEM comparison.高分辨率遥感影像地形图的几何精度不可避免地受到轨道器姿态颤振的影响。因此,有必要在发射前对月球轨道器上搭载的立体测绘相机进行初步研究。提出了一种考虑姿态颤振的轨道器光学影像成像仿真方法。通过分别模拟三个姿态角的抖动,分析了不同姿态抖动对地形起伏的影响。所提出的模拟方法基于严格的成像模型,利用月球数字高程模型(DEM)和正射影像作为参考数据。在考虑姿态颤振的情况下,对月球立体测绘相机的轨道和姿态进行了仿真。根据轨道器在给定轨道上的位置和姿态生成二维模拟立体影像。利用DEM和仿真立体影像进行了实验分析。仿真成像结果表明,该仿真方法在保证成像效率的同时,又不损失地形制图的精度。通过DEM对比分析了姿态颤振对立体仿真影像制图精度的影响。

关 键 词：topographic mapping lunar orbiter stereo camera attitude jitter imaging simulation digital elevation model 

分 类 号：P236[天文地球—摄影测量与遥感]