顾及姿态偏移的重力梯度卫星姿态确定方法  

A gravity gradient satellite attitude determination method by using attitude offset correction

作　　者：陈逸峰 朱广彬 常晓涛 刘伟[2] 祝会忠 CHEN Yifeng;ZHU Guangbin;CHANG Xiaotao;LIU Wei;ZHU Huizhong(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;Land Satellite Remote Sensing Application Center,Beijing 100048,China;College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]自然资源部国土卫星遥感应用中心,北京100048 [3]山东科技大学测绘与空间信息学院,山东青岛266590

出　　处：《测绘科学》2023年第4期46-53,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42174041,42204010)。

摘　　要：针对卫星在轨温度变化导致GOCE卫星星敏感器视轴夹角相对于地面安装矩阵计算结果存在5″~9″的系统偏移,并且单星敏感器低精度分量会因坐标系变换存在精度混叠现象的问题,该文设计了一种构建温度响应函数模型校正星敏感器间相对姿态偏移的多星敏感器组合方法,有效削弱了在轨温度变化对星敏感器的观测影响,以及单星敏感器低精度分量对高精度分量的混叠效应。结果表明,多星敏感器组合有效克服了单星敏感器低精度分量的影响,提高了重力梯度张量的分离精度,顾及姿态偏移校正进行多星敏感器组合后,减小了姿态误差影响,重力梯度观测张量的迹精度提高了14 mE,与欧洲空间局发布的数据5 947.811 mE精度相近。Aiming at the small offset of 5″~9″ between the inter-boresight angles observed in-flight by the star trackers on board the GOCE satellite and the pre-flight ones existed,which was related to the variation of star trackers' temperature.And the noise in the lower accurate components of the single star tracker would mix into the higher accurate components in the coordinate system conversions.This paper used a method for combining the attitude quaternions measured by three trackers that included a linear function of temperature to calibrate the relative attitude offset between the star trackers and reduced the effect of noise propagation on the star tracker's high-precision component,which was caused by single star tracker's low-precision component.The results showed that the combination of star trackers overcame the lower accuracy of the single star tracker and improved the accuracy of the gravity gradient tensors.Compared to the combination of the multiple star trackers,the accuracy of attitude data was improved,and the trace of gravity gradient tensor was reduced by 14 mE.The calculated values were of comparable accuracy to the European Space Agency's results.

关 键 词：卫星重力梯度 星敏感器 视轴夹角 星敏感器温度 姿态四元数组合 

分 类 号：P223[天文地球—大地测量学与测量工程]