| 顾及共模误差的西南极GPS坐标时间序列噪声分析 |
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| 引用本文： | 王朝阳,邢喆,张峰,杨晓彤,王力彦.顾及共模误差的西南极GPS坐标时间序列噪声分析[J].大地测量与地球动力学,2022,42(2):132-138. |
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| 作者姓名： | 王朝阳 邢喆 张峰 杨晓彤 王力彦 |
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| 作者单位： | 国家海洋信息中心,天津市六纬路93号,300171 |
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| 基金项目： | 极地考察业务化与科研:南北极环境综合考察评估与管理(1123173041);国家重点研发计划(SQ2020YFF0426316);国家海洋信息中心青年科学基金(202001003)。 |
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| 摘 要： | 使用Bernese 5.2软件双差定位程序处理西南极区域24个GPS基准站9 a的观测资料,获得各站单日解坐标时间序列.利用主分量分析法和独立分析法对其进行空间滤波,对比分析2种方法的滤波效果,然后采用极大似然估计法分析滤波前后各站时间序列的噪声特征,建立最优噪声模型,并分析共模误差对测站速度的影响.结果表明,2种方法...
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| 关 键 词： | 共模误差 GPS 坐标时间序列 噪声模型 西南极 |
Noise Analysis of the GPS Coordinate Time Series in the West Antarctic with Consideration of Common Mode Error |
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| WANG Zhaoyang,XING Zhe,ZHANG Feng,YANG Xiaotong,WANG Liyan.Noise Analysis of the GPS Coordinate Time Series in the West Antarctic with Consideration of Common Mode Error[J].Journal of Geodesy and Geodynamics,2022,42(2):132-138. |
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| Authors: | WANG Zhaoyang XING Zhe ZHANG Feng YANG Xiaotong WANG Liyan |
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| Institution: | (National Marine Data and Information Service,93 Liuwei Road,Tianjin 300171,China) |
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| Abstract: | We use the Bernese GNSS software version 5.2 to analyze the data of 9 years of 24 GPS reference stations in the west Antarctic region, calculating the single-day solution under the mode of double-difference processing to acquire the coordinate time series. We employ principal component analysis(PCA) and independent component analysis(ICA) to put spatial filtering on the time series and compare and analyze the filtering effects of the two methods. We use the maximum likelihood estimation method to analyze the noise characteristics before and after filtering and establish the optimal noise model for each station. The results show that both methods can effectively extract the common mode errors in the west Antarctic region, but the results of PCA are slightly better than those of ICA. The noise models of GPS stations in the west Antarctic region are diverse, and mainly for WN+FN and WN+ARMA(1). After deducing the common mode error, the optimal noise model of some stations changes, and the regional distribution characteristics are not obvious. The influence of spatial filtering on the velocity field of station is less than 0.1 mm/a, but it can reduce the order of white noise and colored noise, thus greatly reducing the uncertainty of velocity. |
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| Keywords: | common mode error GPS coordinate time series noise model west Antarctic |
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