2009年7月22日日全食电离层效应观测  

Observations of the Ionosphere Effects of the Solar Eclipse on 22 July 2009

作　　者：胡雄[1] 吴小成[1] 徐轻尘[1] 马广林[1,2] 涂翠[1,2] 闫召爱[1,2] 陈旭杏[1,2] 肖存英[1] 赵明亮[1] 龚建村[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《空间科学学报》2011年第5期596-601,共6页Chinese Journal of Space Science

基　　金：国家自然科学基金项目(40774087);国家航天领域高技术课题共同资助

摘　　要：首次利用廊坊中频雷达和武汉、嘉兴、廊坊等三站GPS对2009年7月22日日全食电离层效应进行了观测.日食期间,中频雷达D层78 km高度上电子密度减小了约67%,电子密度为200 cm^(-3)的高度上升了近10 km,GPS/TEC减小了1TECU左右,其变化的最大相位与日食最大相位几乎同步;日食后,观测到周期为2个多小时的电离层扰动现象.For the first time, Langfang Medium-Frequency （MF） radar was used to simultaneously observe the ionospheric effects due to the solar total eclipse on 22 July 2009, with three GPS/TEC receivers operated at Wuhan, Jiaxing and Langfang respectively. Results show that during the solar eelipse, the D layer electron densities at 78km level observed by the MF radar decreased by 67% and the altitude level of equivalent electron densities of 200em-3 uprised about 10km. The ionospheric Total Electron Content （TEC） observed by the GPS/TEC receivers in the above three sites respectively decreased about 1 TECU. Their minimum reductions of the D layer electron densities and TEC are synchronous with the solar eclipse maximum phase. After the solar eclipse, a Traveling Ionospheric Disturbance （TID） was revealed with a period of larger than 2 h in the GPS/TEC data.

关 键 词：日食 电离层效应 中频雷达 电子密度 GPS/TEC 

分 类 号：P352[天文地球—空间物理学]