| 环境负载对GNSS坐标时间序列噪声特性的影响研究 |
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| 引用本文： | 许锡文,张志伟,李辰风,席瑞杰.环境负载对GNSS坐标时间序列噪声特性的影响研究[J].大地测量与地球动力学,2021,41(12):1219-1222. |
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| 作者姓名： | 许锡文 张志伟 李辰风 席瑞杰 |
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| 作者单位： | 江西应用技术职业学院测绘地理信息学院,江西省赣州市文峰路9号,341000;长江三峡勘测研究院有限公司(武汉),武汉市光谷创业街99号,430074;武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079 |
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| 摘 要： | 基于中国大陆构造环境监测网络的连续GNSS观测数据，选取云南省25个测站的坐标时间序列研究地表质量变化对建立噪声模型的影响。计算陆地水负载、大气压负载和非潮汐海洋负载引起的测站非线性变化，采用极大似然估计对不同噪声组合进行分析，分别建立负载改正前后各GNSS测站的最优噪声模型，同时估计速度的不确定度。结果发现，云南省GNSS测站各分量的噪声特性主要表现为闪烁噪声+白噪声(FN+WN)；环境负载改正能够改变坐标时间序列的最优噪声模型；用加入环境负载改正后建立的最优噪声模型估计各测站的速度不确定度，对于E、N、U分量，分别有72%、80%、68%的测站的速度不确定度变小。
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| 关 键 词： | 环境负载 GNSS坐标时间序列 噪声分析 |
Research on Environmental Loading Impact on Noise Characteristics of GNSS Coordinate Time Series |
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| XU Xiwen,ZHANG Zhiwei,LI Chenfeng,XI Ruijie.Research on Environmental Loading Impact on Noise Characteristics of GNSS Coordinate Time Series[J].Journal of Geodesy and Geodynamics,2021,41(12):1219-1222. |
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| Authors: | XU Xiwen ZHANG Zhiwei LI Chenfeng XI Ruijie |
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| Abstract: | Based on continuous GNSS data from crustal movement observation network of China (CMONOC), we select the coordinate time series of 25 stations in Yunnan province to study the influence of mass loading on noise model. After calculating the displacements induced by continental water storage, non-tidal atmospheric and non-tidal oceanic loading, we analyze the different combinations of noise models and ascertain trend uncertainties using maximum likelihood estimation. Then, we establish the best noise model before and after environmental loading correction of all GNSS stations, and estimate the velocity uncertainty. We find that nearly all the coordinate components are characterized by flicker noise plus white noise(FN+WN), the best noise model can be changed by environmental loading correction, and the velocity uncertainty of 72%,80%,68% stations can be decreased with environmental loading correction for E,N,U direction, respectively. |
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| Keywords: | environmental loading GNSS coordinate time series noise analysis |
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