Acknowledgements

The TomoScand products use the highrate GNSS data provided by International GNSS Service, the International Association of Geodesy Reference Frame Sub-Commission for Europe Permanent GNSS Network (EUREF EPN) available from the EUREF EPN Regional Data Centre by Bundesamt für Kartografie und Geodäsie.

TomoScand uses satellite code bias information from the International GNSS Service Multi-GNSS Experiment and Pilot Project, available from The Crustal Dynamics Data Information System, see additional information in references.

TomoScand developers are grateful for the dynasonde data from European Incoherent Scatter Scientific Association Tromsø site and The Institutet för rymdfysik Kiruna site.

GNSS data preprocessing is performed with the Deutsche GeoForschungsZentrum RINEX GNSS Data Conversion and Manipulation Toolbox and with the open source GPSTk software, which is sponsored by the Space and Geophysics Laboratory, within the Applied Research Laboratories at the University of Texas at Austin (ARL:UT).

The TomoScand developers are grateful for the developers of Multifrontal Massively Parallel sparse direct Solver (MUMPS) which is used in the analysis for the computations with an R language interface for Multifrontal Massively Parallel sparse direct Solver (RMUMPS) developed by Mikko Orispää (https://github.com/morispaa/rmumps).

TomoScand development is currently funded by Academy of Finland (decision no. 287679).