中文摘要：

将EMD分解与小波分析组合应用于VTEC周期探测,通过对多尺度分解后的IMF分量进行小波分析,探测可能存在的电离层活动周期,从而提高探测成功率。分别对高、中、低3个不同纬度的VTEC序列进行周期探测,验证了该方法的可行性,并发现可能存在6d、24d等周期。

英文摘要：

The combination of EMD and wavelet analysis is used to detect the period of VTEC.The possible period of ionospheric activity is detected by analyzing the IMFs under multi-scale with wavelet analysis.The probability can be increased with this new method.The VTEC series at different latitudes released by IGS is used as an example.The feasibility and validity of the method promoted in this paper is proven.The possibility of 6d,24 dand others is discovered and a new approach is proposed for period detection of VTEC.