The Quasi-Biennial Vertical Oscillations at Global GPS Stations: Identification by Ensemble Empirical Mode Decomposition
Modeling nonlinear vertical components of a GPS time series is critical to separating sources contributing to mass displacements.Improved vertical precision in GPS positioning at stations for velocity fields is key to resolving the Queen Poster Bed mechanism of certain geophysical phenomena.In this paper, we use ensemble empirical mode decompositio