基于小波变换的地震前后GNSS ZTD异常变化分析

王勇; 娄泽生; 刘严萍; 王轩

doi:DOI:10.13442/j.gnss.1008-9268.2019.03.009

基于小波变换的地震前后GNSS ZTD异常变化分析

doi: DOI:10.13442/j.gnss.1008-9268.2019.03.009

1.
天津城建大学地质与测绘学院,天津 300384
2.
天津城建大学经济与管理学院,天津 300384
3.
河南理工大学测绘与国土信息工程学院,河南焦作 454000

详细信息

作者简介:
刘严萍 (1979-),女,博士,讲师,主要从事GNSS气象学研究.

通讯作者:
刘严萍 E-mail: liuxiawy@126.com.

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- 被引次数: 0
出版历程
- 刊出日期: 2019-06-15

Abnormal change of GNSS ZTD before and after earthquake based on wavelet transform

1.
School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China
2.
School of Economics and Management, Tianjin Chengjian University, Tianjin 300384, China
3.
School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China

摘要

摘要: 地震前后的水汽变化特征分析可为震前地震预测和灾后次生灾害预警提供参考．该文借助小波变换方法开展地震前后全球卫星导航系统(GNSS)天顶对流层延迟(ZTD)(水汽)的异常变化研究．通过对ZTD结合地震与降水数据来分析地震前后水汽变化特征,利用小波变换的方法分解重构ZTD数据,分析GNSS ZTD在地震前后的异常变化．研究发现:地震前后存在水汽突变情况,小波变换后的ZTD能更清楚显示震后水汽变化特征与地震关系及水汽周期变化．
- 地震 /
- 水汽 /
- 天顶对流层延迟 /
- 降水 /
- 小波变换
Abstract: The characteristics analysis of precipitable water vapor (PWV) change before and after earthquakes can provide reference for earthquake prediction and early warning of secondary disasters after earthquakes. In this paper, the abnormal changes of GNSS ZTD (PWV) before and after earthquakes are studied with the method of wavelet transform. By combining ZTD, seismic and precipitation data, the characteristics of water vapor change before and after earthquakes are analyzed. The ZTD data is decomposed and reconstructed by wavelet transform, and the abnormal changes of GNSS ZTD before and after earthquakes is analyzed. It is found that there is a sudden change of water vapor before and after earthquakes, and the ZTD after wavelet transform can clearly show the relationship between the characteristics of water vapor change and earthquakes and the change of water vapor cycle after earthquakes.
- earthquake /
- precipitable water vapor /
- zenith tropospheric delay /
- precipitation /
- wavelet transform

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参考文献(13)

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