中国境内IGS跟踪站精密单点定位坐标时间序列频谱分析  

SPECTRAL ANALYSIS OF COORDINATE TIME SERIES OF PRECISE POINT POSITIONING OF IGS REFERENCE STATIONS IN CHINA MAINLAND

作　　者：芦琪[1] 张小红[1] 

机构地区：[1]武汉大学测绘学院,武汉430079

出　　处：《大地测量与地球动力学》2014年第5期64-69,74,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金项目(41074024)

摘　　要：选取ITRF2008框架下中国区域内5个IGS基准站（WUHN、BJFS、URUM、KUNM、SHAO）2012年的观测资料,利用TriP软件解算得到基准站的坐标时间序列。提出一种改进的野值剔除方法,对剔除野值后的坐标时间序列进行噪声和周期特性分析,并将实验结果与GAMIT/GLOBK双差解算得到的坐标时间序列分析结果进行对比。实验结果表明,中国境内的IGS站坐标时间序列存在一定的趋势性和周期性运动,各站的最优噪声模型不尽相同。URUM、KUNM、BJFS、SHAO基准站最优噪声模型都表现为BPPL＋WN,但WUHN基准站N、E、U方向坐标时间序列分量噪声模型分别为BPPL＋WN、FN＋WN、PL＋WN。在适用于BPPL＋WN的噪声模型中白噪声分量值仍占主要部分,普遍大于2 mm;BPPL分量只有WN分量的1/10左右,在0.28～0.89 mm之间。就噪声分量的大小来说,双差解算得到的坐标时间序列中噪声普遍小于利用TriP解算得到的结果,而两种方法解算得到的各测站噪声模型也有一定差异。Focusing on the coordinate time series of 5 IGS reference stations in China mainland （WUHN, B.I FS URUM,KUNM,SHAO） during 2012 under ITRF 2008, coordinate time series was calculated by software TriP, gross error was removed by an improved gross-removing method, and noise as well as periodical analysis had bccn implemented using different noise model combination. Meanwhile, the experimental results were compared with the results calculated by GAMIT/GLOBK. Conclusion is drawn that noise model of IGS station coordinate time series in China mainland contain a trend and periodical movement, and optimal noise model is different from each others. The optimal noise model of URUM, KUNM, BJFS, SHAO stations is BPPL ＋ WN, the optimal noise model of WU- HN is BPPL ＋ WN, FN ＋ WN, PL ＋ WN in N, E, U direction. White noise, which is still the main part during optimal noise models is BPPL ＋ WN, is generally greater than 2 mm. BPPL, which is only about one tenth WN component, is between 0. 28 mm to 0. 89 mm. Besides, noise component of coordinate time series calculated by GAMIT/GLOBK is less than the results calculated by TriP, stations＇ optimal noise models calculated by two different softwares are not exactly the same.

关 键 词：精密单点定位 坐标时间序列 野值剔除 噪声模型 频谱分析 

分 类 号：P228.41[天文地球—大地测量学与测量工程]