The morphology of F2 layer during the solar eclipse is examined, and the mechanism of its formation is discussed theoretically.
本文着重考察了日全食时F_2层的形态，对其形成机制进行了理论探讨。
During ionospheric storm periods, the existing prediction methods for the critical frequency of ionospheric F2 layer(foF2) can not satisfy the requirements of the practical applications.
在电离层风暴期，现存的电离层F2层临界频率预测方法不能满足实际应用的要求。
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