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Abstract

Dionysos Satellite Observatory (DSO) of the National Technical University of Athens (NTUA) undertook the monitoring of the Corinth Gulf region through GPS/GNSS stations and the development of a multidisciplinary platform. The DSO automatic GNSS data processing platform has been significantly upgraded the last year to estimate a number of parameters per day. The most critical is the coordinates of each station, estimated every day, in the IGb14 reference frame. Data from 36 permanent GNSS stations, installed in the wide area of Corinth Gulf, were analyzed. Position time series were processed for all stations where the available data had a time period greater than 2.5 year for the estimation of the velocity field. Time series analysis follows an iterative process, where at each step one and/or more new parameters are tested based on their statistical significance. Linear trend, seasonal signal and power spectral density ware estimated. A dense velocity field was produced, with respect to IGb2014 for stations with data availability greater than 2.5 years. A velocity field also with respect to a stable Europe was calculated. Different kinematic models were considered to approximate the behavior of the solid crust in the region are presented. The StrainTool software is used with minor modifications, to estimate strain rates, dilatation and the other parameters of the strain tensor on a grid with different grid steps. Finally, the results are available on the web portal that has been developed as part of the DSO website.