Title: GNSS REFERENCE SOLUTION FOR PERMANENT SITION STABILITY MONITORING AND GEODYNAMICAL INVESTIGATIONS - THE ASG-EUPOS CASE STUDY |
Authors: Szafranek Karolina, Bogusz Janusz and Figurski Mariusz |
DOI: 10.13168/AGG.2013.0006 |
Journal: Acta Geodynamica et Geomaterialia, Vol. 10, No. 1 (169), Prague 2013 |
Full Text: PDF file (1.9 MB) |
Keywords: GNSS stations monitoring, reference frame, ASG-EUPOS |
Abstract: The aim of this paper is to present the strategy of determination of the reference solution for the ASG-EUPOS (Active
Geodetic Network – European Position Determination System) coordinate monitoring system. ASG-EUPOS is a network of
permanent GNSS (Global Navigation Satellite System) stations controlled by the Polish Head Office of Geodesy and
Cartography (HOGC), which main role is to realize the ETRS89 (European Terrestrial Reference System) in the territory of
Poland. The Centre of Applied Geomatics (CAG) of the Military University of Technology (MUT) performs a control
processing of the network and it is the leader of the ASG+ (the supporting modules for ASG-EUPOS system real-time
services) project within which the coordinate monitoring system was developed. The coordinate monitoring is aimed to assess
the actual performance of the GNSS stations and the reliability of the system and its services. The Polish realization of the
ETRS89 is also controlled, where the deviation of the actual coordinates from the reference values are monitored.
Furthermore, the monitoring enables the analysis of factors that degrade the individual GNSS stations and assess the solution
stability which has impact on the quality of the determined geodynamic parameters.
The reference solutions (coordinates and their changes over time) were determined according to the recommendations of the
IAG sub-commission for the European Reference Frame concerning densification of EUREF. The paper presents the
determination of the reference cumulative solution and the results of the processing of a few years long series of GNSS
observations. The analysis are performed by the Bernese 5.0 and CATREF software. The results consists of daily and subdaily
ASG-EUPOS reference solutions. They are also considered as input data for geodynamic studies to determine the
horizontal and vertical velocity fields. Estimation of the individual station velocities is of crucial importance for the ETRF
(European Terrestrial Reference Frame) reference frame maintenance to assess the compatibility of the current station
position with its catalogue (reference) value and apply coordinate correction if necessary. |