It is shown that the TEC variation is associated with the local time the solar perturbing occurred and the coupling of the ionospheric particles of high latitude with the solar particle.
由此看出，磁暴期间电离层tec的变化直接与太阳扰动发生的时间及其对高纬电离层的耦合有关。
Generalized into local frequency from integral frequency, the method of joint time-frequency distribution effectively analyzes the signal based on the variation of frequency with time.
联合时频分布方法把整体频谱推广到局部频率，根据频率随着时间的变化情况，对信号进行有效的分析。
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