航天器工程2016，Vol.25Issue(6)：25-31,7.DOI:10.3969/j.issn.1673-8748.2016.06.005
敏捷光学卫星无控几何精度提升途径探讨
Discussion of Geo-location Accuracy Increasing Methods of Agile Satellite Without Ground Control Points
摘要
Abstract
In light of geo-location accuracy of the agile optical satellite,this paper proposes a fine locating propagation model which distinguishes the high-frequency and low-frequency attitude errors,as well as considering the system design parameters.By the simulation analysis,the influence law of the low-frequency error and attitude stability error to the final location accuracy is presented.Taking the 30m location accuracy and the map scale of 1∶50 000 as an example,the value of index is analyzed and the methods of increasing geo-location accuracy is put forward.The result is that the low-frequency errors mainly impact the horizontal geo-location accuracy.The 30m accuracy would be met with no more control to the attitude problem,but only imaging with larger and symmetric intersection angles.If the satellite attitude measurement accuracy reaches 0.9" and the 200 Hz high-frequency attitude measurement equipment and the on-orbit angle measurement equipment are used between the star track and the camera,also with the control of the low-frequency errors within 5",the accuracy for the map scale of 1:50 000 (plan 15m and height 6m) would be met.关键词
敏捷光学卫星/无控制点/定位精度/低频误差/姿态内插/姿态稳定度Key words
agile optical satellite/without ground control points/locating accuracy/low-frequency errors/attitude interpolation/attitude stability分类
天文与地球科学引用本文复制引用
李贞,金涛,李婷,杨冬..敏捷光学卫星无控几何精度提升途径探讨[J].航天器工程,2016,25(6):25-31,7.基金项目
国家重大航天工程 （）
