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2 Reports on Geodesy

2 2006

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Work-Package 7 of the CERGOP-2/Environment: geo-kinematical modelling and strain analysis final report: april 2003 - july 2006

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Hefty J. , Haslinger C. , Stangl G. , Becker M. , Drescher R.

tom z. 4/79

419-459

The main objective of Work Package 7 (WP7) was modelling of the regional intraplate three-dimensional velocities at the millimetre level on the basis of GPS satellite observations. Subsequently it was anticipated to use the GPS velocity filed for detection of velocity changes and for strain analysis in the region of Central Europe. This analysis has to be completed by evaluation of statistical significance of the derived velocities and strain parameters. All relevant information has to be visualised and to result to geo-kinematical maps of Central Europe describing the geometrically derived velocities and crust deformations. Inputs to WP7 are permanent and epoch GPS long-term observations in the region of Central Europe, east Alpine-Mediterranean and Balkan. The main information is expected from CERGOP epoch campaigns because their complexity, station distribution and long observing history. The permanent GPS stations in the region are analyzed within Work-Package WP5 "GPS data analysis and the definition of reference frames" (Hefty, 2006) and WP6 "Analysis of long term coordinate time series" (Caporali et al., 2006). Velocities from some new stations established within the CERGP-2/environment are estimated in section 2.6 of this report.

Work-Package 7 of the CERGOP-2/Environment: geokinematical modelling and strain analysis activity report september 2004 - april 2005

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Hefty J.

tom z. 4/79

371-374

Activities of WP 7 in the period September 2004 - April 2005 were devoted mainly to finalization of analysis of CEGRN'03 observing campaign and production of combined solution from relevant number of CERGOP processing centres. These results were then applied to estimation of the velocity field in the region using CEGRN epoch observations from 1994 to 2003. These new, more reliable velocities will serve as basis for subsequent strain analyses. Status of the CEGRN in 2003 comprising 71 stations is shown in Fig. 1. Among them are 35 permanent stations (including the IGS stations outside the Central Europe region which are used for referencing CEGRN to ITRF).