Adria-Eurasia collision front: Multi constellation GNSS data Processing in ITRF2020 reference frame

North-Eastern Italy is of particular interest in tectonics as it lies on the northernmost edge of the convergent margin between Eurasia and the Adria microplate, influencing regional deformation and seismicity. The Friuli Venezia Giulia Deformation Network (FReDNet) was established in the area in 2002 to monitor crustal deformation and contribute to regional seismic hazard assessment.

Tunini et al. (2024) described the time series spanning two decades from GNSS stations located in north-eastern Italy and surrounding areas, as well as the resulting velocity field in the ITRF14 reference frame. The documented dataset was obtained by processing GPS observations with GAMIT/GLOBK software version 10.71. The time series, estimated using the same procedure, are collected daily and stored as part of a long-term monitoring project, with annual updates of velocity solutions computed.

In this study, we present a multi-constellation solution and evaluate the differences compared to the GPS-only solution. We also update the solution to the new implementation of the International Terrestrial Reference Frame (ITRF2020). We then analyse the impact of the new reference system on the characteristics of the time series and the velocities. We also include additional stations that have recently become available in the solution.

We acknowledge the CINECA award under the ISCRA initiative, for the availability of high performance computing resources and support (IscraC IsCd5_MGNSS20).

Reference:

Tunini, L., Magrin, A., Rossi, G., and Zuliani, D.: Global Navigation Satellite System (GNSS) time series and velocities about a slowly convergent margin processed on high-performance computing (HPC) clusters: products and robustness evaluation, Earth Syst. Sci. Data, 16, 1083–1106, https://doi.org/10.5194/essd-16-1083-2024, 2024.