EUREF Permanent Network (EPS) is a European network of more than 300 continuously operating GNSS reference stations with precisely known coordinates referenced to the ETRS89.
EPS is the key instrument in the maintenance of ETRS89 geodetic datum.
The EPN stations collect continuously the observation data from high accuracy multi-GNSS receivers.
EPS is created and maintained by a voluntary agreement of about 100 European agencies and universities.
[1][2][3] The EPS consists of the following components: EPS data are raw multi-GNSS pseudorange and phase observations, broadcast ephemerides, and supporting types of raw data (such as meteorological) as they are gathered by the Tracking Stations.