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EUREF Permanent Network

The EUREF Permanent Network (EPN) is a science-driven network of continuously operating GNSS reference stations, covering the European continent,and with precisely known coordinates in the ETRS89.

All contributions to the EPN are voluntary, with more than 100 European agencies/universities involved, and the reliability of the network is based on redundancy and extensive guidelines guaranteeing the quality of the raw GNSS data to the resulting station positions.

EPN products are station positions and velocities in the ITRS and ETRS89, the analysis of the station position time series and tropospheric zenith path delays.

More details here.