TDI CCD相机动态成像对几何质量的影响研究  

Impact of TDI CCD camera dynamic imaging on geometric quality by mathematic simulation

作　　者：岳庆兴[1,2] 邱振戈[2] 贾永红[1] 

机构地区：[1]武汉大学遥感信息工程学院,武汉430079 [2]国家测绘局卫星测绘应用中心,北京100039

出　　处：《测绘科学》2012年第3期14-17,共4页Science of Surveying and Mapping

基　　金：民用航天专业技术领先研究项目(D040202)

摘　　要：本文通过影像模拟的方法分析动态积分成像对空间TDI CCD相机成像几何质量的影响。首先对卫星固有推扫速度、像移速度与电荷转移速度失配、卫星三轴姿态运动及偏流角误差等4种动态成像因素进行了介绍,建立了4种因素的数学模型;在此基础上提出了空间TDI CCD相机成像模拟方法;最后提出统计单级静态影像和多级动态合成影像配准误差的分布特点评价与4种因素有关的内部几何质量,统计低阶多项式拟合的姿态曲线与实际姿态曲线条件下地面点像方误差的分布特点评价外部几何质量。This paper analyzed the effect on geometric quality of space TDI -CCD camera by image simulation. Firstly, it introduced inherent velocity of satellite, mismatch of speed between image motion and charge transfer and attitude motion of satellite triaxial, established mathematical model of four factors. On this basis, it introduced image simulation method of space born TDI CCD camera. Lastly, it was proposed that inner geometric quality could be evaluated by statistic registration deviation between static image of one stage and dynamic synthesis image, and geometric quality could be evaluated out by statistic registration deviation between image in the condition of fitting attitude curve and true attitude curve.

关 键 词：TDI CCD 动态成像 模拟 几何精度 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]