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1

New challenges for the CEGRN

Caporali A.

Reports on Geodesy

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2011

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z. 2/91

9-18

EN

The Central European Geodynamic Reference Network is active since the early 1990's with a consistent and systematic activity of measurement, processing and scientific interpretation of the GPS and derived data. The project CERGOP 2 which was financed by the EU under FP5 has contributed to build the necessary cohesion and awareness of the different fields of expertise which are necessary to manage a geodetic network spanning Central Europe, and with important connections to other networks, in particular the EPN. In this second decade there are a number of challenges which will need a strong effort. The ambitious EPOS and TopoEurope projects are looking for a homogeneous and consistent dense velocity field for application to geodynamics and seismicity. The theme of the dense velocity field is present also within the IAG, in the working group 'Regional Dense Velocity Fields'. Finally, the way in which the ETRF2000 coordinates of stations in national networks evolve relatively to the stable part of Europe is related to the details of the 3D velocities. This is relevant to INSPIRE, and the obligation of the EU Countries to follow the ETR89 standards. CEGRN has the potential to effectively play an active role in these scientific issue, because the CEGRN campaigns are of high quality, fulfill state-of-the-art standards and extend over a very long lapse of time. Possible initiatives linked to the scientific projects mentioned above include 1) a participation in the proposed COST Action called TEGO 'Towards a European GNSS Observatory'; 2) a study of the best way to combine the CEGRN campaign solutions with the EPN network solution.

2

Reference frame and model improvements in CEGRN

Drescher R., Becker M.

Reports on Geodesy

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2007

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z. 2/83

47-54

EN

The CEGRN Consortium decided to reprocess all GPS campaigns according new compiled guidelines. In the contribution these guidelines are introduced. Furthermore it was tested, whether they are also suitable for the first campaigns with their paticularities.

3

The time series of the permanent CEGROP stations - first velocity estimations of the non-EPN sites

Haslinger C., Stangl G.

Reports on Geodesy

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2006

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z. 1/76

22-28

4

Preliminary Central European intraplate velocities from CEGRN campaigns 1994 to 2005

Drescher R., Becker M., Schoenemann E.

Reports on Geodesy

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2006

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z. 1/76

47-54

EN

Within the Central Europe Regional Geodynamics Project (CERGOP) for the establishment of a high precision reference frame CEGRN (Central European GPS Geodynamic Reference Network) eight GPS campaign solutions since 1994 are available for velocity estimation. They were used to compute preliminary station velocities in the ITRF2000. This paper reports not only on the results and some comparisons with former solutions published by the CERGOP group but also on the improved options available for velocity estimation with version 5.0 of Bernese GPS Software.

5

Geodesy, tectonics and geodynamics of Dinnarides

Medak D., Pribicevic B., Prelogovic E.

Reports on Geodesy

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2006

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z. 1/76

85-90

EN

This paper summarises recent aetivities on merging the geodetic, geologic and neotectonic evidence of geodynamics in Croatian part of Dinnarides. The area of the City of Zagreb, which is the boundary zone of Eastern Alps, Dinnarides and Pannonian Basin is incIuded as well. It is shown here that the evidence for fractures of Eastern Adriatic differs from the previous hypotheses. This concIusion is derived from the results of various geodetic measurements: satellite positioning (GPS), astro-geodetic measurements of detlections of the vertical. These results are combined with geologic measurements and results of seismic activity studies in order to give more detailed and more accurate picture of the current situation in the tectonically very active region of Dinnarides. Several GPS-campaigns performed in the City of Zagreb area are examined as well. Due to the proximity of Croatian capitol, special attention has been paid to the effects of possible hazard on construction code.

6

Final Report on research activities within the project CERGOP2/Environment in Croatia

Medak D., Pribicevic B., Prelogovic E., Dapo A., Medved I.

Reports on Geodesy

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2006

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z. 1/76

81-84

EN

Researchers from the Faculty of Geodesy, University of Zagreb, organized and performed various research activities within the project CERGOP2/Environment. The participation in both CEGRN campaigns was ensured with two epoch stations: Brusnik and Hvar. Activities related to the working package 10.4: International geodynamic test area Plitvice Lakes included several hydrographic measurements with the combination of GPS positioning and echosounder bathymetry. Repeated measurements with two frequencies yielded new insight about the sediments on the lake bottom. A structural map of the Lakes has been prepared, too. Geodynamic measurements has been performed on several special points. The foundation for future permanent station in the area of the Plitvice Lakes has been prepared.

7

Determination of deformations of the Central Europe from CERGOP GPS observations campaigns

Klek M., Rogowski J. B.

Reports on Geodesy

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2006

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z. 1/76

55-60

EN

Determination of deformations parameters from CERGOP GPS observations campaigns are presented at the poster. The velocity vectors are determined for CERGOP stations participated in GPS observations campaigns in the period 1994-2005. In the period of 11 years, 7 GPS observation campaigns were executed. Good quality of observations and data processing create chance to determined precise value of velocity and deformations like main directions of deformations and elongation (distortion). Method used for computation of deformation was proposed by Altiner. Comparison of deformation parameter with a European stress model made by Jarosiński is also presented in the paper.

8

Crustal movements in the Eastern Alps and the North Mediterranian, Slovenian part of WP.10.1. Geodynamics at the Alps - Dinarides junction in Slovenia after geological, seismological and geodetic data

Poljak M., Placer L., Zivcic M., Bilc A., Vodopivec V.

Reports on Geodesy

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2006

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z. 1/76

153-168

EN

Central Europe Regional Geodynamic Project (CERGOP) in Slovenia includes GPS measurements on 5 sites. Within the first part of the project during years 1994-1997, measurements were performed on one site (Ljubljana), and during the CERGOP-2 extension in years 1999-2005 additional 4 sites were added (Bozica, Malija, Sneznik and Mrzlica). However, till now measurements on the three sites only (Ljubljana, Bozica and Malija) have been completed. Obtained data show similar sense and amount of horizontal displacements. They exhibit general northward movement of sites at the average velocity of 3 mm/yr. This is in accordance with results obtained from other sites of circum-Adriatic region, and it confirms the northward movement of the Adriatic microplate towards the "stable" Eurasian plate. In Slovenia, a northward oriented Ol tensor have been also obtained from several tens of earthquake fault pIane solution. Slight differences in sense and velocity of displacements among particular sites could be explained by the influence of local structures. In Slovenia, they belong to the Periadriatic dextral shear zone, to the Dinaric dextral shear zone, and tothe Transdanubian sinistraI shear zone. However, the real dynamics of particular structures, among which some also express co-seismic creep, will be possible to determine only by GPS measurements over a den ser network of sites.

9

CERGOP-2/Environment. Summary of the third year

Pesec P., Fejes I.

Reports on Geodesy

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2006

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z. 1/76

9-19

EN

The project "CERGOP-2, a multipurpose and interdisciplinary sensor array for environmental research in Central Europe" was approved by EU within the 5th Framework Program and started April 1st, 2003. The official and of the project is March 31, 2006. However we applied for a prolongation of another 6 months and we are waiting for a relevant decision of EU. In 17 work packages we extented a high quality GPS network in a region covering about 15 % of Europe. It will be operational for the next decade. Velocity field and strain maps for geodynamical investigations and hazard mitigation, data for climate research and weather forecast, data for real time navigation and a seamless data bank for scientific and public access were established. This report gives a final summary of the project was arranged in Sarajevo, Bosnia Herzegovina ( in November 2005), which included a Governing Board Meeting of the CEGRN Consortium (CCGB). Discussions included site quality issues related to site acceptance for CEGRN - the basic reference network, and an open forum on future potential project initiatives. The ADRIA, the GMES (Global Monitoring for Environment and Security), the GEO (Group on Earth Observation), the GALILEO, WEGENER and TOPO EUROPE topical project areas were identified, where the Consortium could participate/contribute significantly. Candidate coordinators were assigned for each area. We have also to think about the continuation of this project - after its termination end of March 2006 or end of September 2006. Driven by the many natural disaster during the last 2 years people expect that science will strengthen its efforts to find solutions for explaining the influence of the forces leading to crust displacement and to determine the location, magnitude and the "date" of future expected sudden displacements, a task, which may take another century of scientific investigations, if even possible.

10

CERGOP-2 Project activities of Bulgaria

Milev G., Vassileva K., Becker M.

Reports on Geodesy

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2006

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z. 1/76

111-118

EN

This paper summarizes the recent works with respect to the CERGOP-2 project tasks. The main activity was the implementation of the Working Package "Geodynamics of Balkan Peninsula". Major efforts were taken to the maintenance of the operation of two permanent GPS stations in Bulgaria and to arrange for the data transmission to the CERGOP Data Centre in Graz. The CEGRN GPS campaigns of 2003 and 2005 were analyzed together with additional Balkan Peninsula stations. New results on coordinates and velocities for this Balkan Peninsula subnet of CEGRN are computed and will be presented and discussed. The accomplished works on the monograph "Geodynamics of Balkan Peninsula" with the preparation of the manuscripts and the main content of the findings will be outlined.

11

CERGOP2 database after the project. Eu Project Cergop2/Environment Work Package 1

Haslinger C., Stangl G.

Reports on Geodesy

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2006

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z. 1/76

21-22

12

Annual Report CEGROP-2/Environment WP2. Station qality assessment and upgrade. Period: April 2005 - March 2006

Virag G.

Reports on Geodesy

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2006

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z. 1/76

65-70

13

Annual Progress Report of activities of the Institute of Geodesy and Geodetic Astronomy of the Warsaw University of Technology for the period from 1.04.2005 to 31.03.2006

Śledziński J.

Reports on Geodesy

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2006

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z. 1/76

217-220

14

Analysis of CEGRN 2005 as the eighth of CERGOP observing campaigns

Hefty J., Gerhatova L., Stangl G., Haslinger C., Krauss S., Becker M., Drescher R., Grenerczy G., Kratochvil R., Liwosz T.

Reports on Geodesy

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2006

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z. 1/76

39-46

EN

Strategy of analysis and results from solution of CEGRN epoch campaign in 2005 Combined solution of CEGRN 2005 based or individual solutions from six an: centres and its comparison with CEGRN 2003 coordinates. Time evolution of coordinates at some long-term observed CEGRN sites obtained during epoch camp since 1994 and the related problems.

15

A software module for quqlity control of CEGRN sites

Schoenemann E., Becker M., Gutwald J.

Reports on Geodesy

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2006

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z. 1/76

103-109

EN

GPS observations are still intluenced by a whole amount of effects, as for example multiple reflections, ionosphere etc. which have an impact on the accuracy of the observables even on carefully selected sites. Up to now these effects can not be mitigated or modelled satisfactorily. Hence the monitoring of these station specific effects is mandatory in order to judge about data quality and derive weighting or deletion schemes for optimal parameter estimation. Within the tasks of the work package 4 of the Central Europe Geodynamics Project (CERGOP), a software tool was developed to monitor the continuously operating reference stations of the network. The development was carried out using C++ libraries available for the most common operating systems. Here we describe the basic features of this package and give an overview of its present status.

16

CEGRN 2003 solution and its relation to CEGRN 1994-2001 campaign results

Hefty J., Gerhátová L'., Stangl G., Cristea E., Kratochvíl R., Liwosz T.

Reports on Geodesy

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2005

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z. 2/73

33-40

EN

Analysis strategy and results from CEGRN epoch campaign in 2003. Combined product based on individual network solutions by four analysis centres and its comparison with CEGRN 2001 coordinates. Time evolution of coordinates at some long-term observed CEGRN sites during seven epoch campaignssince 1994.