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 22 July 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 78 km level observed by the MF radar decreased by 67%and the altitude level of equivalent electron densities of 200 cm~(-3) uprised about 10 km. 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 2h in the GPS/TEC data.
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