Prediction Models of Ionospheric TEC Improved by EMD Method

The Ionosphere is a complex system, and of which total electron content (TEC) is a representative parameters. For its non\|linear and non\|stationary characteristics, the empirical mode decomposition (EMD) method is proposed for data processing in this field. And the data decomposed with EMD are used to do time series analysis and predict TEC value.Prediction and comparison experiment is carried out with the data provided by IGS in 2010. And the results show that the mean relative precision of TEC predicted within 5 days is 92.25% by the proposed method , while it is 89% by the single time series analysis.