DBPapers
DOI: 10.5593/SGEM2014/B22/S9.054

REFERENCE FRAME REALIZATION IMPACT ON NETWORK DEFORMATION - GEODYNAMIC RESEARCH IN TECTONIC STABLE AREAS

A. Araszkiewicz, K. Szafranek, M. Figurski
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-11-7 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 2, 427-434 pp

ABSTRACT
Observations from navigation satellite systems (mainly GPS) from many years are used for the Earth’s crust movement and deformation monitoring. Today we have a possibility to detect the smallest displacement (at mm level) and thanks to greater density of the networks in recent years accurate deformation rate field can be provided. In Central Europe, where the relative movements of the Earth’s surface are small, one should be careful to interpret the results of GPS measurements, specially in case if data from the GPS stations not designed to measure Earth’s surface movements are used. Therefore, there is a need to develop method that allows to verify the reliability of the strain rate maps calculated from GPS networks. This will allow to verify if observation from GPS stations situated in tectonically stable regions give consistent results in comparison to geological surveys or if they present seeming deformation directions and Earth surface movements. The project result will also try to answer the question what is the demand for new GPS stations set up strictly for geodynamical purposes. This is especially important in the context of preparations for the EPOS (European Plate Observation System) project, which main objective is to integrate the existing infrastructure (including GPS stations) for the purpose of various Earth sciences. The paper shows how the reference frame realization of Polish network (ASG-EUPOS) affects the direction of the principal axes of the strain rate tensor and its values.

Keywords: GPS velocities, GPS strain rates, reference frame