GOCE卫星引力梯度数据滤波方法研究  

Study of filtering method for GOCE satellite gradiometry observations

作　　者：刘焕玲[1,2,3] 赵永奇 文汉江[1,2] 徐新禹[4] LIU Huanling;ZHAO Yongqi;WEN Hanjiang;XU Xinyu(Chinese Academy of Surveying &Mapping,Beijing 100036,China;Key Laboratory of Earth Observation and Geospatial Information Science,Beijing 100036,China;Beijing Key Laboratory of Urban Spatial Information Engineering,Beijing100038,China;Schoolof Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]中国测绘科学研究院,北京100036 [2]地球观测与时空信息科学重点实验室,北京100036 [3]城市空间信息工程北京市重点实验室,北京100038 [4]武汉大学测绘学院,武汉430079

出　　处：《测绘科学》2019年第6期66-71,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41574019);DAAD战略合作伙伴与专题研究合作网络项目(57421148);高分辨率对地观测系统重大专项;城市空间信息工程北京市重点实验室经费资助项目(2019211)

摘　　要：针对GOCE卫星引力梯度观测值中低精度分量和低频有色噪声的处理策略问题,该文采用模型模拟值代替低精度分量Vxy和Vyz,以减弱低精度分量在坐标系转换中对高精度分量的影响。深入分析比较了多种滤波方法处理GOCE卫星引力梯度观测值中有色噪声的效果,提出采用Butterworth零相移滤波方法加移去-恢复技术的思路,实测数据的处理效果验证了该方法的有效性。In view of the problem of the processing strategy of components with low precision and colored noise at low frequency in satellite gradiometry observations,the simulation values were used to replace the low-precision components Vxy and Vyz in order to reduce the influence of low-precision components in coordinate system transformation.The effects of different filtering methods to deal with the colored noise in GOCE satellite gravitational gradient observations are compared and analyzed.The method of combining Butterworth zero-phase filtering with remove-restore is proposed and verified by the GOCE satellite measured data.

关 键 词：GOCE卫星引力梯度观测值 有色噪声 Butterworth零相移滤波 移去-恢复技术 坐标转换 

分 类 号：P228[天文地球—大地测量学与测量工程]