Long-term densification of terrestrial reference frame in Central Europe as the result of Central Europe Regional Geodynamic Project 1994-2006

Cooperation of 14 Central European countries in the framework of the Central Europe Regional Geodynamics Project (CERGOP) resulted in determination of coordinates and velocities for more than 50 sites in Central Europe, Alpine-Adria region and Balkan Peninsula. The set of selected stations with carefully checked monumentation and observational environment comprises the Central Europe Geodynamics Reference Network (CEGRN). This network is recently strengthened by new permanent stations in the region. Epoch campaigns at CEGRN sites were performed annually or bi-annually during period from 1994 to 2005. In 2006 one week of observations at permanent CEGRN stations was arranged as additional campaign. Simultaneous processing of all campaigns allowed defining horizontal coordinates with accuracy at 2 - 4 mm level and horizontal velocities with accuracy 0.5 - 1.0 mm/year. The link to the ITRS is achieved through a set of IGS and EPN permanent stations which were intentionally included in analysis of CEGRN epoch campaigns. The accuracy and reliability of obtained velocities is examined by the comparison with data from independent sources. We present here the obtained final velocities referred to ITRF2000 as well as the plots of intraplate velocities.