| GPS/PWV时间序列特征提取方法的研究 |
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| 引用本文： | 胡广保,叶世榕,张彦祥,夏朋飞,夏凤雨.GPS/PWV时间序列特征提取方法的研究[J].大地测量与地球动力学,2019,39(1):36-40. |
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| 作者姓名： | 胡广保 叶世榕 张彦祥 夏朋飞 夏凤雨 |
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| 作者单位： | 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;东莞市测绘院,广东省东莞市东城大道268号,523660 |
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| 基金项目： | 国家自然科学基金;国家重点研发计划;福建省发展引导性基金;福建省测绘地理信息局科技创新项目;国家公益性行业科研专项 |
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| 摘 要： | 针对GAMIT/GLOBK软件解算得到的4 a GPS/PWV时间序列的特征提取问题，提出基于滤波辅助的部分集成经验模态分解（PEEMD）与Hilbert谱分析相结合的特征提取方法。首先，在PEEMD方法的基础上,结合滤波辅助的PEEMD方法与Hilbert谱分析，建立GPS/PWV时间序列特征提取模型；然后，将所提出的方法应用于TNML测站4 a的GPS/PWV长时间序列和7 d的GPS/PWV短时间序列分析中，并将滤波辅助的PEEMD结果与传统的小波分解结果进行对比。结果表明，该特征提取方法能准确有效地提取出 GPS/PWV时间序列中的周年周期和日周期特征分量，滤波辅助的PEEMD分解结果与小波分解结果一致，且提取的特征分量与原始信号更加吻合。
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| 关 键 词： | GPS/PWV 特征提取 滤波辅助的PEEMD Hilbert谱分析 |
Research on a Feature Extraction Method of GPS/PWV Time Series |
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| HU Guangbao,YE Shirong,ZHANG Yanxiang,XIA Pengfei,XIA Fengyu.Research on a Feature Extraction Method of GPS/PWV Time Series[J].Journal of Geodesy and Geodynamics,2019,39(1):36-40. |
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| Authors: | HU Guangbao YE Shirong ZHANG Yanxiang XIA Pengfei XIA Fengyu |
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| Abstract: | To extract the features of 4-year GPS/PWV time series obtained by GAMIT/GLOBK software, we propose a GPS/PWV feature extraction method based on combination filter-assisted partly ensembled empirical mode decomposition(PEEMD) and Hilbert spectrum. First, filter-assisted PEEMD is combined with Hilbert spectrum to establish the feature extraction model of GPS/PWV. Then, the proposed method is applied to analyze the 4-year and 7-day GPS/PWV time series at TNML station, and the result of filter-assisted PEEMD is compared with the result of traditional wavelet decomposition. The results show that the proposed feature extraction method can accurately extract the feature components of annual and daily cycles, and that the results of the filter-assisted PEEMD are consistent with those of the wavelet decomposition, and that the extracted feature component are more coincident with the original signal. |
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| Keywords: | GPS/PWV feature extraction filter-assisted PEEMD Hilbert spectrum |
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