| ????PCA????????????TEC?? |
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| 引用本文： | 汤俊,姚宜斌,陈鹏,张顺.????PCA????????????TEC??[J].大地测量与地球动力学,2013,33(4):22-25. |
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| 作者姓名： | 汤俊 姚宜斌 陈鹏 张顺 |
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| 作者单位： | 武汉大学测绘学院,武汉,430079 |
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| 基金项目： | 国家自然科学基金创新研究群体项目，国家自然科学基金 |
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| 摘 要： | ????IGS???????GIM???????????????TEC??Total Electron Content?????????2007-2011???????й??????????17???M??≥6.0????????????????????PCA??Principal Component Analysis?? ???????????TEC??????????????????????????б???????????PCA??????????????????????????????????????????￡???????????????TEC????????????????????????????0~5??
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| 关 键 词： | ?????????? ????? ?? ????????? ???? |
PCA METHOD IN DETECTION OF IONOSPHERIC TEC ANOMALIES BEFORE EARTHQUAKE |
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| Tang Jun;Yao Yibin;Chen Peng;Zhang Shun.PCA METHOD IN DETECTION OF IONOSPHERIC TEC ANOMALIES BEFORE EARTHQUAKE[J].Journal of Geodesy and Geodynamics,2013,33(4):22-25. |
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| Authors: | Tang Jun;Yao Yibin;Chen Peng;Zhang Shun |
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| Institution: | Tang Jun;Yao Yibin;Chen Peng;Zhang Shun;School of Geodesy and Geomatics,Wuhan University; |
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| Abstract: | We analyzed 17 ??M??≥6.0 earthquakes which occurred in the mainland of China from 2007 to 2011 by Total Electron Content ??TEC?? provided by IGS web. We used Principal Component Analysis??PCA?? method to detect the TEC anomalies over the epicenter and compared with the method of sliding window statistics. The results show that the PCA analysis is not affected by geomagnetic storm, and broadly consistent with the results of the analysis of the two statistical methods. There are significant abnormalities in the same time and space. Ionospheric TEC anomalies are mainly concentrated in the 0-5 days before the earthquake. |
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| Keywords: | principal component analysis ionospheric anomaly total electron content earthquake |
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