Comparison of static GPS determinations obtained with the POZGEO service and GPS local network elaboration

On the terrain of LGOM, the geodetic measurements aimed at deformation monitoring investigations began in early 60-ties. Exploitation of copper ore on the area of LGOM started in early 70-ties of the XX century. Since that time the deformation process is monitored with the best possible geodetic techniques available. In 1992 the classical measurements have been compiled with results of GPS positioning. GPS campaigns are performed once per year or at least every two years since that date. They comprise the whole control GPS point network of LGOM and some chosen points of the detailed shaft networks. The Polish part of the EUPOS network, called ASG-EUPOS, started to work in 2008, and a question arose how it can be used for the purpose of LGOM terrain deformation monitoring. One of suggestions was to take advantage of the automatic computations of static GPS sessions, which is possible within the ASG-EUPOS network through one of its services, called POZGEO. The main aim of this paper is to check what are the obtainable accuracies within this service and whether they are good enough to be applied in de formation monitoring. Results of comparisons of POZGEO coordinates with the coordinates computed using older GPS methods are given