Leading institution: Research Institute of Geodesy, Topography and Cartography, v.v.i.
GNSS (Global Navigation Satellite System) consists of two permanent networks in the Czech Republic, VESOG (11 stations) and GEONAS (18 stations), and the permanent network PPGNet (6 stations) in the northwest of the Gulf of Corinth in Greece. The selected 10 stations contribute to the International GNSS Service (IGS) and to the permanent EUREF (European Reference Frame) network. The distribution of GNSS data to the international community is provided by the GOP Operational and Data Center (Geodetic Observatory Pecný) and GNSS data processing, including the generation of advanced products (station coordinates, precise satellite orbits, Earth rotation parameters, etc.) is performed by the GOP Analytical Center and contributes to EUREF. GOP develops and provides GNSS software products, which are now used in a number of international organizations and are being prepared for use in EPOS.
GNSS campaigns are repeatedly measured on the HORNSUNDNET network in Svalbard (7 stations) for monitoring tectonics and glase-isostatic stroke. Epoch GNSS and gravimetric measurements are performed on the GREVOLCAN network (35 stations) to monitoring active volcanoes on the Greek islands of Nisyros and Thira and on the WEBGEODYN network (26 stations) in western Bohemia. The section also includes the Gravimetric Station Pecný, equipped with a superconducting relative gravimeter and an absolute gravimeter, which contribute to the Global Geodynamic Project (GGP) and to the International Service for Geodynamics and Earth Tides (IGETS).