基于GPS数据的地震前电离层TEC异常研究
Ionopsheric TEC Anomalies of Pre-Earthquake Based on GPS Data
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摘要: 选取印度洋区域7个IGS站,运用2004年12月26日印度洋地震前后共计25 d的GPS观测数据,计算出高时空分辨率的VTEC。综合考虑了太阳和地磁活动参数,运用统计分析的方法,详尽阐释了地震发生前TEC减小的电离层异常现象。Abstract: Seven IGS stations is selected in the Indian Ocean,using the GPS measurements of total 25 days before and after Indian Ocean earthquake event on 26th December,2004,VTECs are computed with high temporal and spatial resolution,with consideration of the solar and geomagnetic parameter during this time,ionospheric anomalies with phenomenon of VTEC decrease is detailed explained adopting a statistical analysis method.
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