平台姿态误差对TDCCD相机成像几何质量影响（.docVIP

平台姿态误差对TDICCD相机成像几何质量影响( 巫兆聪1，杨帆1，巫远1，朱军2，韩杏子2 （1.武汉大学 遥感信息工程学院，湖北 武汉 430079；2.航天东方红卫星有限公司，北京 100094） 摘 要：研究卫星平台姿态误差对TDICCD相机成像几何质量影响有助于提出指标设计要求以提高相机几何成像质量，以像点位移为中间参量，研究了平台姿态和成像几何质量指标之间的定量关系。基于平台姿态误差引起的像移速度、偏流角和积分时间等成像参数误差分析，结合严密几何成像模型推导了像点位移的误差模型，建立了从像点位移量到相邻像元间角度畸变、长度畸变、像元分辨率和定位误差等几何质量指标的定量模型，构建了从平台姿态误差到相机成像几何质量指标的完整定量分析链路。仿真实验结果表明偏航角姿态误差是影响成像几何质量的主要因素。 关键词：平台姿态误差；像移；成像几何质量 中图分类号：P237 文献标识码：A 文章编号： The Impact of Satellite Platform Attitudes’ Error on the Imaging Geometric Quality of TDICCD WU Zhaocong, YANG Fan, WU Yuan, ZHU Jun, HAN Xingzi （1.School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China; 2.Dong Fang Hong Satellite Co.Itd. BeiJing 100094,China） Abstract: The research of influence on TDICCD camera’s imaging geometric quality can contribute to improving quality by advancing the design requirements of the platform. This paper studied the quantitative relation of the platform attitude error and the imaging geometric quality based on the image point displacement. The model of imaging parameters error caused by attitude error was built, including the error of image motion velocity, the drift angle correction and integral time. Then the paper deduced relation between imaging parameters error and image motion combined with the strict geometric imaging model. The quantitative model of the geometric quality indexes under the influence of image motion was established, including angle distortion, length distortion, pixel resolution and positioning accuracy. The perfectly quantitative chain from attitude error to geometric quality indexes was created. The paper conducted simulation experiment and the results indicate the main influencing factor of geometric quality is the error of yaw angle. Key Words: Platform Attitudes’ Error; Image Motion; Geometric Quality of Imaging 随着航天事业的迅速发展，各遥感应用领域对影像质量要求越来越高。遥感卫星在轨成像质量受到多种因素的影响，包括空间环境、光学成像系统、电子电路系统以及卫星平台等。卫星平台中影响成像质量的主要因素为姿态稳定度、姿态指向精度、姿态测量精度，以及载荷成像时像移补偿和时间同步精度等平台技术指标[1]。卫星在轨运行和成像