The Central European GNSS Research Network (CEGRN) dataset

Area of Science:

• Geodesy and Geophysics
• Satellite Navigation Systems
• Earth Sciences

Background:

• The Central European GNSS Research Network (CEGRN) has been collecting Global Navigation Satellite System (GNSS) data since 1994.
• The network comprises data from 42 institutions in 33 countries, contributing to a robust geodetic dataset.
• GNSS data are crucial for monitoring crustal deformation and maintaining reference frames.

Purpose of the Study:

• To provide an updated dataset of precise GNSS-derived positions and velocities.
• To ensure the dataset adheres to international standards and the latest processing procedures.
• To contribute to the maintenance and accuracy of the European Terrestrial Reference Frame (ETRF2000).

Main Methods:

• A dataset of 1229 positions and velocities was generated from sites with at least 3 coordinate measurements over 4+ years.
• Velocity data were combined from eight multiyear, overlapping networks.
• Alignment to the ETRF2000 reference frame was achieved using 234 stations from the European Permanent Network (EPN).

Main Results:

• The combined CEGRN network achieved a root mean square (rms) of less than 5 mm after a 7-parameter Helmert transformation for individual contributions (1996-2017).
• The network's origin was maintained coincident with the ETRF2000 reference frame to within 1.8 mm rms.
• Mean positions and velocities of common stations showed minimal differences compared to EPN Class A stations at epoch 2010.0.

Conclusions:

• The CEGRN dataset provides a highly accurate and reliable source of geodetic information for Central Europe.
• The network's alignment and precision contribute significantly to the stability and integrity of the ETRF2000.
• The findings validate the CEGRN's methodology and its contribution to global geodetic research.