A new GPS derived velocity field of the postglacial adjustment in Fennoscandia, and its implications for the maintenance of the European geodetic reference frame

摘要

A new velocity field for 53 permanent GPS stations in NW Europe is presented. It is based on 3000 days of GPS observations between January 1996 and June 2004. In this study the GAMIT/ GLOBK software package has been used for the GPS analysis and reference frame realization. Our approach for reference frame realization has demonstrated global consistency with the ITRF2000 velocity field at the sub-mm/yr level. The new velocities are used in a preliminary study to account for internal deformations within the Eurasian tectonic plate when reducing the NKG 2003 GPS Campaign [Knudsen et al, and Jivall et al, this issue] back to a common epoch valid for the current official ETRS 89 realizations in the Nordic and Baltic countries.