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scientific and technological committees: Centres of 
Excellence Physics of Matter, Technology Transfer Centre, 
Earth Science, Experimental Mechanics, Meteorology, 
Astronomy and Astrophysics, Space, Industrial Technologies 
and Automation, Parallel Computing. 
The paper contains some new actions and evident 
achievements gained by the realisation of the programme of 
international cooperation within the CEI WGST Section C 
"Geodesy". In particular, the paper will outline the results and 
future plans of international cooperation in the following 
areas: 
• Project CERGOP (Central Europe Regional 
Geodynamics Project); 
• Programme EXTENDED SAGET (Satellite 
Geodynamical Traverses); 
• Project UNIGRACE (Unification of Gravity Systems in 
Central and Eastern Europe); 
• Project UNIHIP (Unified National High Precision 
GPS Networks in Central Europe); 
• Working Group on University Education Standards; 
• Working Group on Satellite Navigation Systems; 
• Cooperation between CEI Section C "Geodesy" and EGS 
’(European Geophysical Society) Section "Geodesy"; 
• Cooperation links between CEI Section C "Geodesy" and 
IAG (International Association of Geodesy). 
Subcommission IAG "Geodetic and Geodynamic 
Programmes of the Central European Initiative (CEI)" 
2. PROJECT CERGOP (CENTRAL EUROPE 
REGIONAL GEODYNAMICS PROJECT) 
The main objectives of the project are: to integrate the 
geodynamic research in the Central European region based on 
high accuracy space geodetic measurements, to investigate the 
most profound geotectonic features in the Central European 
region, the Teisseyre-Tornquist zone, the Carpathians, the 
Bohemian Massif, the Pannonian Basin and the Alpine-Adria 
region as well as to provide a stable Central European GPS 
Reference Network (CEGRN) for sub-regional, local or across 
the borders investigations and deformation studies. The first 
phase of the Project was concluded on 30 June 1998 and now 
the second phase of the Project is being realised. The 
following 11 countries joined the first phase of the Project in 
1994: Austria, Croatia, the Czech Republic, Germany, 
Hungary, Italy, Romania, Poland, Slovakia, Slovenia and 
Ukraine. As associated country Bulgaria joined the project in 
1996. The Project is headed by Hungary (Istvan Fejes) and 
Poland (Janusz Slcdzinski). 
Since 1994 four epoch monitoring satellite GPS (Global 
Positioning System) campaigns of the first phase of the 
Project have been carried out on this network in yearly 
intervals (in 1994, 1995, 1996, 1997). In 1999 the first 
campaign of the second phase of the Project was organised 
and successfully performed. The CERGOP Data Center was 
established in 1994 and is hosted by the Observatory 
Lustbuhel, Graz, Austria. The satellite observational data of 
the CEGRN monitoring campaigns were processed in the 
CERGOP Processing Centres. Originally 3 processing groups 
were formed in Graz, Austria; Penc, Hungary and Warsaw, 
Poland. In a later stage of the project the number of 
processing centers increased to 8 by organising further centres 
in Bratislava, Slovakia; Frankfurt, Germany; Matera, Italy; 
Pecny, Czech Republic and Zagreb, Croatia. A major 
development of the project was the establishment of CERGOP 
Study Groups (CSGs). The groups were formed by the 
collaboration of scientists from two or more member countries 
to carry out research in a particular field. Nine CERGOP 
Study Groups remained active during the whole project 
period. The CERGOP Study Groups established for the 
second phase of the Project are given in the a table below. 
The project participants have met regularly at the semi-annual 
CERGOP Working Conferences. The proceedings of these 
conferences were published in REPORTS ON GEODESY by 
the Warsaw University of Technology, generally within 3 
months following the conference, which can be considered as 
exemplary. The scientific results of the project were mainly 
presented at the bi-annual International Seminar on „GPS in 
Central Europe”, organised by the FÖMI Satellite Geodetic 
Observatory, Penc, in Hungary. The proceedings of these 
conferences were also published in the REPORTS ON 
GEODESY series. 
The first phase of the Project CERGOP was partially 
supported financially from the Programme COPERNICUS of 
the European Commission. As the Coordinator served Institut 
für Angewandte Geodäsie (now Bundesamt für Kartografie 
und Geodäsie), Frankfurt/Main/Germany. Lately the proposal 
for the second phase of the Project CERGOP-2 was submitted 
to the European Commission with the request for financial 
support from the 5th Framework EU Programme 
(Coordinator: Austrian Academy of Sciences). 
As the main achievements of the Project CERGOP-1 we can 
specify the following: 
• Establishment and maintenance of the Central European 
GPS Reference Network consisting of 31 sites on the 
territories of 11 countries. The sites satisfy the strict 
requirements for repeated GPS monitoring on the highest 
accuracy level (the accuracies of 2-4 mm in horizontal 
coordinates and 4-8 mm in vertical coordinates have 
been achieved). 
• Eleven CEGRN stations are permanent GPS stations 
providing continuous monitoring capabilities for tectonic 
studies. The remaining 20 sites are so called „epoch 
stations’ which give positional information at the 
measurement epochs. 
• The Central European Terrestrial Reference Frame 
(CETRF) has been established, which suits best for 
geophysical, geotectonic studies of the region. The 
yearly monitoring of CETRF provided already 
significant kinematic results about intraplate tectonic 
motions in Central Europe. Twenty two stations from 
CEI countries (eleven CEGRN stations) are used for 
permanent monitoring of the European Reference Frame 
(EUREF). 
• The scientific outputs of CERGOP Study Groups 
presented at different international conferences should 
also be mentioned. Perhaps the most notables among 
them are the five monographs of five particular regions 
in Central Europe produced by CSG.8 „Geotectonic 
analysis of the region of Central Europe”. The following 
volumes of geotectonic monographs were published in 
REPORTS ON GEODESY series: The Pannonian Basin 
(edited by G. Grenerczy), The Bohemian Massif (edited 
by P. Vyskocil), The Teisseyre-Tornquist Zone (edited 
by J. Liszkowski), The Northern Carpathians (edited by