The paper analyzes the chaotic properties of ionospheric total electron content based on the 600TEC data from 101~150din 2008over 120°E and 45°N.Calculation results show that the TEC time series is chaotic when correlation dimension is 2.263 2,embedding is 5and largest Lyapunov exponent is 0.083 3.A new method to choose the more similar phase points is advanced based on cosine and cluster analysis while the weighted one-rank local-region forecasting method is used sucessfuly to forecast the time series of T...
电子浓度总含量(total electron content,TEC)是描述电离层形态和结构的重要参数,通过对TEC的准确定量预报,可以准确地反映电离层的基本变化情况[1]。对于电离层TEC的预报,特别是对于数小时至数天的短期预报,通常采用线性时间序列预测模型(如ARMA或AR模型)进行预报[2],而对于电