Comparison of Velocity Field and Baseline Lenth Variations for European Stations Derived from GPS and VLBI Data

Details Comparison of Velocity Field and Baseline Lenth Variations for European Stations Derived from GPS and VLBI Data Comparison of Velocity Field and Baseline Lenth Variations for European Stations Derived from GPS and VLBI Data

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..16e..74p&link_type=abstract

Nomenclature, Precession and New Models in Fundamental Astronomy, 26th meeting of the IAU, Joint Discussion 16, 22-23 August 200

Astronomy and Astrophysics

Astronomy

Scientific paper

Results of GPS and VLBI observations collected on European stations were analyzed with the goal to investigate variations in observed stations positions and baseline lengths from both techniques. VLBI coordinates were obtained from processing all available observations collected on European and global VLBI networks using OCCAM/GROSS and QUASAR software. Advanced model for antenna thermal deformation was applied for more accurate account for the change in horizontal component of station positions and baselines derived from VLBI observations. Coordinates and velocities of European GPS-stations were obtained from a new combination of the weekly solutions of EPN (European Permanent GPS Network) Analysis Centers. The calculated linear velocities of the European GPS-stations showed good agreement with the results obtained within EUREF Special Project "EPN Time Series Monitoring". For the European stations with both VLBI and GPS techniques we obtained time series of baseline lengths on the time span 1997 - 2004. The linear drift and seasonal effects in the variations of baseline lengths derived from VLBI and GPS solutions showed agreement within formal errors for most of the baselines.

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