摘要
分析了BDS多路径组合观测中低频分量的特性及其对定位精度的影响;基于MGEX跟踪站的GNSS观测数据,利用功率谱、相关函数和奇异谱分析等方法对BDS多路径组合观测值进行了分析。结果表明,相邻2 d伪距多路径组合的低频分量相关性较高;原始时间序列中含有高频分量,属于随机噪声;通过奇异谱分析对GEO卫星多路径组合中的低频分量进行提取和改正试验,跟踪站CUT0和JFNG在N、E、U三个坐标分量上定位结果的标准差分别改善了0.2 m、0.1 m、0.2 m和0.2 m、0.4 m、0.5 m。
Aiming at the problem of low frequency component of multipath combination observation in the BDS,we analyzed its characteristics and influence on positioning accuracy.Then,based on GNSS observation data of MGEX tracking station of IGS,we used power spectrum,correlation function and singular spectrum analysis to analyze the multi-path combination observation of the BDS.The experimental results show that the correlation between the low frequency components of pseudorange multi-path combination in adjacent two days is relatively high.At the same time,the original time series contains high frequency components,which belongs to the random noise.The low frequency components of GEO satellite multi-path combination are extracted and corrected by singular spectrum analysis.The standard deviations of the tracking station CUT0 and JFNG located the three coordinate components on N,E and U are respectively improved 0.2 m,0.1 m,0.2 m and 0.2 m,0.4 m,0.5 m.
出处
《地理空间信息》
2019年第3期31-34,I0008,共5页
Geospatial Information
基金
精密工程与工业测量国家测绘地理信息局重点实验室开放基金资助项目(PF2012-3)
江苏省地质矿产勘查局科研资助项目(2016-KY-03)
江苏省产学研前瞻性联合研究资助项目(BY2015002-04)
关键词
GEO
伪距多路径
SPP
奇异谱分析
功率谱
GEO
pseudorange multi-path
SPP
singular spectrum analysis
power spectrum
