Empirical Mode Decomposition at Coordinate Time Series of Permanent GNSS Stations

The coordinate time series of the permanent GNSS stations include trend and seasonal changes in the linear or non-linear direction. Factors such as shell deformations, tectonic movements, atmospheric or hydrological stresses are generally effective in the occurrence of these changes. In order to provide accurate and reliable sources of information in geodetic, geodynamic and geophysical fields, trend and seasonality should be analyzed in coordinate time series. In this study, Up coordinate time series of TUBI station from permanent GNSS stations in Turkey are investigated. In the coordinate series covering the range of 1999 and 2014, Empirical Mode Decomposition method was used to obtain Intrinsic Mode Function and determine the non-linear trend