Periodic signal extraction of GNSS height time series based on adaptive singular spectrum analysis

IF 2.8 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS Geodesy and Geodynamics Pub Date : 2023-06-05 DOI:10.1016/j.geog.2023.04.003

Chenfeng Li , Peibing Yang , Tengxu Zhang , Jiachun Guo

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Abstract

Singular spectrum analysis is widely used in geodetic time series analysis. However, when extracting time-varying periodic signals from a large number of Global Navigation Satellite System (GNSS) time series, the selection of appropriate embedding window size and principal components makes this method cumbersome and inefficient. To improve the efficiency and accuracy of singular spectrum analysis, this paper proposes an adaptive singular spectrum analysis method by combining spectrum analysis with a new trace matrix. The running time and correlation analysis indicate that the proposed method can adaptively set the embedding window size to extract the time-varying periodic signals from GNSS time series, and the extraction efficiency of a single time series is six times that of singular spectrum analysis. The method is also accurate and more suitable for time-varying periodic signal analysis of global GNSS sites.

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基于自适应奇异谱分析的 GNSS 高度时间序列周期信号提取

奇异谱分析广泛应用于大地测量时间序列分析。然而，当从大量全球导航卫星系统（GNSS）时间序列中提取时变周期信号时，选择合适的嵌入窗口大小和主成分会使这种方法变得繁琐而低效。为了提高奇异频谱分析的效率和准确性，本文通过将频谱分析与新的跟踪矩阵相结合，提出了一种自适应奇异频谱分析方法。运行时间和相关性分析表明，本文提出的方法可以自适应地设置嵌入窗口大小，从 GNSS 时间序列中提取时变周期信号，单个时间序列的提取效率是奇异谱分析方法的六倍。该方法还具有较高的精度，更适用于全球 GNSS 站点的时变周期信号分析。

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来源期刊

Geodesy and Geodynamics GEOCHEMISTRY & GEOPHYSICS-

CiteScore

4.40

自引率

4.20%

发文量

566

审稿时长

69 days

期刊介绍： Geodesy and Geodynamics launched in October, 2010, and is a bimonthly publication. It is sponsored jointly by Institute of Seismology, China Earthquake Administration, Science Press, and another six agencies. It is an international journal with a Chinese heart. Geodesy and Geodynamics is committed to the publication of quality scientific papers in English in the fields of geodesy and geodynamics from authors around the world. Its aim is to promote a combination between Geodesy and Geodynamics, deepen the application of Geodesy in the field of Geoscience and quicken worldwide fellows'' understanding on scientific research activity in China. It mainly publishes newest research achievements in the field of Geodesy, Geodynamics, Science of Disaster and so on. Aims and Scope: new theories and methods of geodesy; new results of monitoring and studying crustal movement and deformation by using geodetic theories and methods; new ways and achievements in earthquake-prediction investigation by using geodetic theories and methods; new results of crustal movement and deformation studies by using other geologic, hydrological, and geophysical theories and methods; new results of satellite gravity measurements; new development and results of space-to-ground observation technology.