146 
Since there are many projects of common interest of both CEI 
and EGS, it was decided during the XXI EGS General 
Assembly in the Hague (The Netherlands) in 1996 that 
starting from the next XXII General Assembly of the 
European Geophysical Society, Vienna, Austria, 21-25 April 
1997 special symposia devoted to geodetic and geodynamic 
programmes of the CEI would be held. Prof. Dr. J. Sledzinski 
(Poland) was elected the Convener of the Symposium. Further 
EGS Symposium "Geodetic and Geodynamic Achievements 
of the CEI (Central European Initiative)" was organised at the 
XXIII General Assembly of the EGS in Nice in April 1998. 
The Convener of this Symposium was Prof. Dr. Janusz 
Sledzinski (Warsaw, Poland) and the Co-Convener Prof. Dr. 
Jan Kostelecky (Prague, the Czech Republic). The EGS G4 
symposium "Geodetic and Geodynamic Programmes of the 
CEI" was held in April 1999 in The Hague as one of the 
symposia of the XXIV General Assembly of the European 
Geophysical Society EGS. The next Millennium EGS-CEI 
Symposium G12 "Geodetic and Geodynamic Programmes of 
the CEI" will be held again in Nice, France, April 25-29, 
2000. About 45 papers on EUREF campaigns in CEI 
countries, CERGOP, UNIGRACE, activities of the CSGs, 
contribution of permanent GPS stations in CEI countries to 
international programmes, etc. are usually presented at the 
oral and poster sessions of the EGS-CEI symposia. 
11. COOPERATION LINKS BETWEEN CEI SECTION 
C "GEODESY" AND I AG (INTERNATIONAL 
ASSOCIATION OF GEODESY). SUBCOMMISSION 
IAG "GEODETIC AND GEODYNAMIC 
PROGRAMMES OF THE CENTRAL EUROPEAN 
INITIATIVE (CEI)" 
In February 1996 a new IAG (International Association of 
Geodesy) Subcommission was founded to initiate the 
cooperation links between CEI Section C and IAG. The 
Subcommission "GEODETIC AND GEODYNAMIC 
PROGRAMMES OF CEI" was created within the 
Commission VII "Recent crustal movements" of the Section 
V "Geodynamics". The Chairman of the Subcommission was 
elected Prof. Dr. J. Sledzinski (Poland). In 1999 the 
organisation of of geodynamic research within IAG has been 
changed. The Subcommission is now acting within the 
Commission XIV on Crustal Deformation of the Section V 
"Geodynamics”. The general charter duties of the 
Subcommission are the following: (1) to integrate the 
geodynamic research in the region of Central and Southern 
Europe based on high accuracy space geodetic surveys and to 
provide a precise geodetic reference frame for studies on 
geodynamics of Central Europe, in particular on areas 
Pannonian Basin, Bohemian Massif, Teisseyre-Tornquist 
Zone, Carpathian Orogenic Belt, Subalpine Region and 
Balkanides; (2) to provide a reliable three-dimensional 
tectonic velocity field covering the Central Europe region and 
integrate it into hierarchically higher level (i.e. global) 
tectonic models as well as to prepare and publish geotectonic 
monographs highlighting and summarizing the latest research 
and studies on regions under study; (3) to contribute to other 
geodynamic programmes organised and coordinated by 
International Association of Geodesy related to the region of 
Central Europe, such as EUREF, WEGENER, 
EUROPROBE; (4) to support local area geodynamic research, 
environmental studies, seismic hazard assessment, 
meteorology etc. in Central Europe region based upon the 
high accuracy space geodetic measurements carried out on an 
integrated geodynamic network of permanent GPS stations in 
CEI countries; (5) to coordinate and to integrate the 
international geodetic and geodynamic programmes supported 
by IAG and CEI; (6) to create close links between running 
projects of IAG and those of CEI, e.g. CEI CERGOP - 
Central Europe Regional Geodynamics Project and IGS 
(International GPS Service) and EUREF (European Reference 
Frame), use of CEI permanent GPS stations within IGS and 
other programmes for maintenance of the ETRF and ITRF, 
etc.; (7) to initiate common geodetic and geodynamic projects 
for the region of Central and Eastern Europe; (8) to foster the 
cooperation among universities and research centres from 
Central Europe and Western countries in the field of geodesy 
and geodynamics, promoting actions contributing to the 
development of innovative technologies and participation of 
CEI scientists in international IAG research programmes; (9) 
to organise scientific symposia, working conferences and 
workshops on geodetic, gravimetric, geodynamic programmes 
and satellite techniques to discuss results and future planned 
actions (e.g. Working Conferences of the programmes of 
CERGOP - Central Europe Regional Geodynamics Project, 
UNIGRACE - Unification of Gravity Systems in Central and 
Eastern Europe, Symposia "GPS in Central Europe, etc.). 
First progress report on the activities of the Subcommission 
was presented at the IAG Scientific Meetings in September 
1997 in Rio de Janeiro, Brazil. The next report was submitted 
to the IAG/IUGG-99 in Birmingham, UK in July 1999. 
12. REFERENCES 
J. Sledzinski. Permanent GPS stations - the background for 
geodynamic studies and maintenance of geodetic coordinate 
systems. Current status of IGS and EUREF permanent 
stations in Central Europe. Paper presented at the 
International Conference "Geodetic monitoring, geodynamics 
and refractometry at the beginning of the XXI century", Lviv, 
Ukraine, 19-23 January 1998; also: GEODYNAMICS, 
1/1998, 
Lviv Astronomical and Geodetic Society, Lviv. 
J.Sledzinski. International cooperation as one of the major 
factors contributing to the European integration at the turn of 
the XX-XXI century. Geodezja i Kartografia, t. XLVII, z. 1-2, 
1998. 
J. Sledzinski. Current status of realisation of scientific 
programmes in geodesy and geodynamics of the CEI sixteen 
countries (introductory paper). Paper presented at the XXIII 
General Assembly of the European Geophysical Society 
(EGS), Symposium G16 "Geodetic and Geodynamic 
Achievements of the Central European Initiative (CEI)". 
Acropolis, Nice, France, 20-24 April 1998. Also Proceedings 
of this Symposium: REPORTS ON GEODESY, IG&GA 
WUT, No. 9 (39), 1998. 
I. Fejes, D. Ghitau, C. Marchesini, M. Mojzes, P. Pesec, E. 
Reinhart, J. Simek, J. Sledzinski, M. Solaric, F. Vodopivec, 
F. Zablotskyj. The Central Europe Geodynamics Project 
CERGOP: Main achievements 1995-1998. Paper presented at 
the XXIII General Assembly of the European Geophysical 
Society (EGS), Symposium G16 "Geodetic and Geodynamic 
Achievements of the Central European Initiative (CEI)". 
Acropolis, Nice, France, 20-24 April 1998. Also Proceedings 
of this Symposium: REPORTS ON GEODESY, IG&GA 
WUT, No. 9 (39), 1998. 
J. Sledzinski. Six GPS campaigns of the Project EXTENDED