GNSS Reprocessing Products

The Institute of Geodesy contributed to the third reprocessing campaign (repro3) of the International GNSS Service (IGS). The time series of GNSS products covers the period 1994–2020 and includes GPS, GLONASS (from 2009), and Galileo (from 2013).

The contribution consists of eight different types of products:

The data is available for download in the TU Graz Repository and in the IGS Data Centers (as files TUG0R03FIN_* in the repro3 subdirectories).

If you use this data, please cite either the overall record

Strasser, S. and Mayer-Gürr, T. (2021) IGS repro3 products by Graz University of Technology (TUG). Data set. Graz University of Technology. https://doi.org/10.3217/dataset-4528-0723-0867

or the product-specific records linked above. For background information about the processing please refer to

Strasser, S., Mayer-Gürr, T., and Zehentner, N. (2019) Processing of GNSS constellations and ground station networks using the raw observation approach. J Geod 93, 1045–1057. https://doi.org/10.1007/s00190-018-1223-2

Processing details

Our processing strategy for repro3 is summarized in the IGS analysis summary file TUG0R03FIN.acn.

We apply an uncombined and undifferenced (raw) observation approach in our GNSS processing (Strasser et al., 2019). Our software package GROOPS (Mayer-Gürr et al., 2020), which supports multi-GNSS processing among other features, has been released as open-source code on GitHub (https://github.com/groops-devs/groops).

The processing included all available stations from the proposed repro3 station list (1212 stations), reaching more than 800 stations per day in the mid-2010s. All available code and phase observations on all frequencies (except Galileo E6) have been used at the full 30-second sampling period.

The following background models and corrections were used during the processing:

Earth rotation: IERS 2010 plus high-frequency EOP model (Desai and Sibios, 2016)
Earth's gravity field: GOCO06s plus C₂₀ replacement from SLR
Moon, Sun and planet ephemerides: JPL DE421
Solid Earth tide: IERS 2010
Ocean tide: FES2014b
Pole tide: IERS 2010 (linear mean pole)
Ocean pole tide: Desai (2004) (IERS 2010, linear mean pole)
Atmospheric tides: AOD1B RL06
Relativistic corrections: IERS 2010
Tropospheric corrections: VMF3
Solar radiation pressure: Box-wing + ECOM2
Earth radiation pressure: Box-wing
Antenna thrust: Steigenberger et al. (2018)

Number of processed satellites and stations over time

Acknowledgements

This work was partly embedded in the project COSMOS, which is funded by the Austrian Research Promotion Agency (FFG) within the Austrian Space Applications Program (ASAP) Phase XVI.

References

Strasser, S. and Mayer-Gürr, T. (2021) IGS repro3 products by Graz University of Technology (TUG). Data set. Graz University of Technology. https://doi.org/10.3217/dataset-4528-0723-0867

Strasser, S. and Mayer-Gürr, T. (2020). The IGS Repro3 Contribution by TU Graz: Benefits and Challenges of an Uncombined and Undifferenced Processing Approach. Poster presented at AGU Fall Meeting 2020, virtual, USA. https://doi.org/10.13140/RG.2.2.15377.86883

Strasser, S. and Mayer-Gürr, T. (2020). Efficient multi-GNSS processing based on raw observations from large global station networks. vPICO presented at EGU General Assembly 2020, virtual, Austria. https://doi.org/10.5194/egusphere-egu2020-3014

Strasser, S., Mayer-Gürr, T., and Zehentner, N. (2019) Processing of GNSS constellations and ground station networks using the raw observation approach. J Geod 93, 1045–1057. https://doi.org/10.1007/s00190-018-1223-2

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