The Session will give a good opportunity to present progress reports and review of all geodetic and geodynamic projects realised in the frame of international cooperation of 17 countries assembled within the Central European Initiative (CEI). Papers covering the following subjects are particularly welcome: Programmes post-CERGOP (Central Europe Regional Geodynamics Project) and UNIGRACE-2 (Unification of Gravity System in Central and Eastern Europe), results of work of scientific CERGOP Study Groups and the Working Groups of the CEI (WG on Satellite Navigation Systems and on University Education Standards), projects of new EUREF (European Reference Frame) and EUVN (European Unified Vertical Network) campaigns in CEI countries, new role and contribution of permanent GPS stations to the maintenance of the geodetic reference frame in Central Europe, determination of geoid in this region as well as results of cooperation among universities of CEI countries. It will be a good chance to inform the broad community of geophysicists, geodesists and all other specialists in Earth sciences on results of your research related to the CEI international projects and actions such as geodynamical studies based on permanent satellite GPS observations, establishment and maintenance of satellite navigation systems, precise determination of the (quasi) geoid, various interesting applications of satellite positioning system GPS and others.