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《Journal of Wuhan University(Natural Science Edition)》 2007-03
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Observation and Analysis of the Ionosphere Response to Substorms by GPS

YUAN Zhigang,TIAN Anmin,DENG Xiaohua(School of Electronic Information,Wuhan University,Wuhan 430072,Hubei,China)  
Three isolated substorms occurred during Apirl 28-29,2001.Data of International GPS(Global Positioning System) Service network is used to study the morphology of ionosphere response to these substorms.In comparison of the characteristics of QTEC deviations to its quiet time values in different latitudes and longitudes and correlation analysis of AE index to ΔQVTEC in Europe-Africa sector,we can obtain results as following: isolated substorm can arose globally large scale ionosphere disturbances with amplitude up to more than 20TECU(1TECU=1016e·m-2).The disturbance status is strongly dependent on local time,as well as latitudes.Without interferences between different responses,the occurrence of isolated substorm has strongly linear correlation with that of ionosphere disturbances.The negative correlation response appeared in high latitudes while positive correlation appeared in middle/low latitudes.
【Fund】: 国家自然科学基金(40574074 40390151 40604021);; 国家杰出青年基金(40325012);; 长江学者特聘教授基金资助项目
【CateGory Index】: P421.34
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