Observations of the Ionosphere Effects of the Solar Eclipse on July 22, 2009
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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1 TECU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.Abstract: For the first time, Langfang Medium-Frequency (MF) radar was used to simultaneously observe the ionospheric effects due to the solar total eclipse on July 22, 2009, with three GPS/TEC receivers operated at Wuhan, Jiaxing and Langfang respectively. Results show that during the solar eclipse, 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 200cm?3 uprising about 10 km. The ionospheric Total Electron Content (TEC) observed by the GPS/TEC receivers in the above three sites respectively decreased about 1TECU. 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.
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Key words:
- Solar eclipse /
- Ionosphere effect /
- MF radar /
- Electron density /
- GPS/TEC
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