线加速度计在轨检测卫星影像颤振的可行性分析  

Feasibility Analysis of Detecting Satellite Image Jitter On-orbit by Linear Accelerometer

作　　者：赵薇薇[1] 范城城 王艳[1] 王密[3] 张彪 陈雪华 ZHAO Weiwei;FAN Chengcheng;WANG Yan;WANG Mi;ZHANG Biao;CHEN Xuehua(Institute of Beijing Remote Sensing Information,Beijing 100192,China;Institute of the Guangxi Zhuang Autonomous Region Remote Sensing Information Surveying and Mapping,Nanning 530023,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China)

机构地区：[1]北京市遥感信息研究所,北京100192 [2]广西壮族自治区遥感信息测绘院,南宁530023 [3]武汉大学测绘遥感信息工程国家重点实验室,武汉430079

出　　处：《航天返回与遥感》2018年第5期49-56,共8页Spacecraft Recovery & Remote Sensing

基　　金：国家973计划(2014CB744201);国家自然科学基金(91438112;91438111;91438203);广西创新驱动发展专项(2018AA13005);广西重点研发计划(2017AB54078)

摘　　要：线加速度计作为当前高分辨率光学卫星搭载的新型传感器,由于无法与相机焦平面固连,能否直接实现卫星影像颤振在轨检测是后续应用关键。针对上述不确定性问题,文章提出了基于视差成像的在轨分析与验证方法,即分别采用线加速度计颤振检测模型与视差成像颤振检测模型得到平台与焦平面颤振信息,进一步在轨道坐标系下进行频谱分析,验证线加速度计在轨检测卫星影像颤振的可行性。试验结果表明,两种检测模型得到的颤振主频频率与幅值基本一致,受多种因素影响,部分频段检测结果略有差异,线加速度计可直接用于颤振影像在轨检测与补偿。As a new sensor on the high resolution optical satellite,the linear accelerometer can not be connected with the focal plane of the camera,therefore,it is critical for the satellite to directly detect the image jitter on orbit in the subsequent applications.In order to solve these uncertain problems,this paper proposes an on-orbit analysis and verification method based on parallax imaging,that is,using the linear accelerometer jitter detection model and the parallax imaging jitter detection model to obtain the platform and focal plane jitter information separately.Further,the spectrum analysis is carried out in the orbit coordinate system to verify the feasibility of the line accelerometer in detecting the jitter of satellite images on orbit.Experiments show that the jitter master frequency and amplitude of the two detection models are basically consistent with each other,although the results in some frequency bands are slightly different due to the influence of various factors.Accordingly,the linear accelerometer can be used directly in jitter image detection and compensation.

关 键 词：颤振检测 线加速度计 视差成像 内部几何精度 高分辨率光学卫星 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] V414[自动化与计算机技术—计算机科学与技术]