Establishing models of surface deformation from geodetic time series GNSS in the southern region of the Iberian Peninsula and North Africa (Spain)

Resumen

Global Positioning System (GPS) technology provides a powerful tool for studying geodynamic processes. It isparticularly important in tectonic plate boundary areas when looking for subduction zone limits. In this work, our maininterest is to focus on the time series analysis obtained from observations of GNSS-GPS satellites. Each GPS observationsession provides topocentric geodetic coordinates (east, north, elevation) of the permanent stations that constitute thegeodetic network established for this purpose. Horizontal components (east, north) use to show linear behaviors if thereare no other effect affecting the site. Anyway the height component (elevation) uses to show periodical but not lineareffects.This work shows a detailed topocentric coordinates time series study for sites belonging to what we call the SPINAnetwork, which stands for South of the Iberian Peninsula, North of Africa Region. The series under study are processedby techniques of relative positioning with respect to the IGS reference station located in Villafranca. Solutions areobtained from network approach with the Bernese software. Then, a designed methodology, using filter processes,harmonic adjustments and wavelets will be applied. Wavelet transform applied on the CGPS position time series is usedto separate the noise of the signal, in order to provide useful information to further geodynamic interpretations. As finalproduct we expect to get horizontal displacement model to describe the regional geodynamic main characteristics.