F. Zablotskij), and The Southern Carpathians (edited by 
D. Ioane). The monographs summarise. the latest 
geoscience results, available on these regions, with 
particular emphasis on the project’s objectives. There is 
also a sixth volume by Vyskocil and Sledzinski which 
contains general characteristics of all regions, list of 
performed studies and a summary, indicating some 
proposals for future investigations. 
The second phase of the Project CERGOP-2 includes three 
new member countries (Albania, Bosnia&Herzegovina and 
Bulgaria); extension of the CEGRN results in accepting in 
total more than 60 CERGOP (CEGRN) sites. Thus the 
extension of the geographic area of the project concludes in 
establishing the Central European Extended GPS Reference 
Network (CEEGRN). The great role play the existing 
permanent satellite stations for maintenance of the Central 
European Terrestrial Reference Frame (CETRF), which is 
best suited for regional tectonic investigations; it is also 
envisaged to introduce CEEGRN network as a subnetwork of 
the EUREF permanent network. The calculation and 
interpretation of the 3D tectonic velocity field covering the 
Central European Region will be continued; the geodynamic 
investigations of interesting regions of Central and Southern 
Europe will be extended. New CERGOP-2 Study Groups 
were established. They are the following: 
CSG. 1 CERGOP stations and site quality monitoring chaired 
by G. Virag (Hungary); 
CSG.2 Coordination of CERGOP analysis centres.- G. Stangl 
(Austria); 
CSG.3 CERGOP Reference Frame and geokinematic 
modelling - J. Hefty (Slovakia) 
CSG.4 Height determination and atmospheric effects - J 
Simek (Czech Republic); 
CSG.5 Geotectonic analysis of the region of Central Europe 
J. Sledzinski (Poland) and P. Vyskocil (Czech 
Republic); 
Groups for regional investigations: 
CSG5/1 Monitoring of recent crustal movements in Eastern 
Alps and the North and Eastern Adriatic with GPS - C. 
Marchesini (Italy); 
CSG.5/2 Three dimensional plate kinematics in Romania - D. 
Ghitau (Romania); 
CSG.5/3 Integration of present geodynamic investigations in 
the Pannonian Basin - G. Grenerczy (Hungary); 
CSG.5/4 International geodynamic test area Plitvice Lakes - 
chairman to be nominated; 
CSG.5/5 Geodynamics of the Tatra Mountains - K. Czarnecki 
(Poland) and M. Mojzes (Slovakia); 
CSG.5/6 Geodynamics of Northern Carpathians-F.Zablotskij; 
CSG.6 Real time monitoring by GPS - A. Nardi (Italy); 
CSG.7 Maintenance and update of the permanent sensor array 
- M. Becker (Germany) and P. Pesec (Austria). 
According to the requirements of the EC 5th Framework EU 
Programme the proposal must be divided into work-packages. 
The following seven work-packages for CERGOP-2 are 
proposed: 
WP1: Enhancement of the Permanent CEEGRN 
Network, 
WP2: Maintenance and Extension of CEEGRN, 
WP3: Central European Terrestrial Reference Frame, 
WP4: Tropospheric Delay Estimation, 
WP5: Ionospheric Modelling, 
WP6: Real Time GPS Applications, 
WP7: Local Deformation Studies in Central Europe. 
3. PROGRAMME EXTENDED SAGET 
For technical reasons the number of sites of the CEGRN was 
limited to 31. It is successfully supplemented by the 
programme EXTENDED SAGET which was initiated by the 
Institute of Geodesy and Geodetic Astronomy of the Warsaw 
University of Technology in 1991 as an extension of the 
Polish Project SAGET (Satellite Geodynamic Traverses) 
launched at this Institute in 1986. There is a significant 
coincidence of scientific aims of both projects CEGRN and 
EXTENDED SAGET; however, there are also very essential 
differences. The EXTENDED SAGET network covers much 
more extended area and an unlimited number of points can be 
incorporated to this network. This gives an excellent 
opportunity to all participating institutions to connect new 
established points to the ITRF coordinate system. 
EXTENDED SAGET campaigns are thought as a long-term 
action and will be performed every year at least in the whole 
of current decade. So far, the EXTENDED SAGET 
campaigns were organised in the following periods: 
EXTENDED SAGET 1992, September 7-11; 
EXTENDED SAGET’1993, August 2-6; 
EXTENDED SAGET' 1994, May 2-6; 
EXTENDED SAGET 1995, May 29 - June 3; 
EXTENDED SAGET 1996, June 10-15; 
EXTENDED SAGET 1997, June 4-10; 
EXTENDED SAGET'1998, June 27 to July 1. 
EXTENDED SAGET’ 1999, June 14-19 
In order to have more points related to the same epoch of 
observation the four campaigns of EXTENDED SAGET 
1994-1997 and the campaign 1999 fully overlapped the 
period of CEGRN campaigns. The following conclusions may 
be pointed out when comparing both projects: (1) The same 
standards of GPS observations are observed in both CEGRN 
and EXTENDED SAGET campaigns, (2) EXTENDED 
SAGET network includes stations of Scandinavia and 
Mediterranean Region. CEGRN is limited only to CEI 
countries; only some regions of Germany, interesting from 
tectonic point of view, are included, (3) EXTENDED SAGET 
campaigns give the possibility to connect to ITRF system new 
points that may be currently needed, (4) Both networks 
(projects) can coexist. Campaigns of both projects may 
supplement each other. 
4. PERMANENT STATIONS IN THE RESEARCH 
PROGRAMMES OF THE CEI 
Over the past few years many permanent satellite stations, 
whose positions are determined basing on permanent twenty- 
four-hour GPS observations of highest accuracy, began their 
operation. These stations belong, above all, to the 
International GPS Service for Geodynamics (IGS) and to the 
EUREF network, but also to the national navigation services 
operating in the Differential Global Positioning System 
organised for various special economic purposes such as 
transport, communication, police, medical service, fire 
department etc. This situation raised new possibilities of using 
permanent observations to monitor certain short-term 
phenomena and made it necessary for us to develop new 
technological procedures related to the collection and 
processing of a very extensive observation data. This also