Principal Investigator: Susanne Glaser, University of Bonn

Personnel GFZ:  Shrishail Raut, Patrick Schreiner, Rolf König, Hans Neumayer, Harald Schuh

The overall project goal of NextGNSS4GGOS is to assess the benefits of next-generation Global Navigation Satellite Systems (NextGNSS) constellations beyond current GPS, GLONASS, Galileo, or Beidou for the three key geodetic objectives: (1) the generation of the global terrestrial reference frame (TRF), (2) the monitoring of Earth’s orientation in space and its rotation (EOP), and (3) the monitoring of shape and variations of Earth’s physical figure, all of them meeting the requirements defined by the Global Geodetic Observing System (GGOS).

Comprehensive and most realistic simulations will be carried out in order to analyze the potential of NextGNSS constellations with new observation types (inter-satellite ranges, highly precise optical clocks, non-gravitational accelerations, attitude data, laser-retroreflector for Satellite Laser Ranging, transmitter for Very Long Baseline Interferometry) for improved TRF, Earth orientation parameters (EOP) and gravity field determination. Therefore, the central research question of this proposal is addressed as:

Can envisaged NextGNSS-based TRFs, EOPs, and gravity field models meet the GGOS requirements of 1 mm accuracy and 1 mm per decade long-term stability?

• Glaser, S., König. R., Raut, S., Schreiner, P., Neumayer, Hans., Männel, B., Schuh, H. (2022): Next generation GNSS for improved geodetic parameters, COSPAR2022 44th General Assembly, 16-24 July 2022, Athens, Greece. https://ui.adsabs.harvard.edu/abs/2022cosp...44.3390G/abstract
• Schreiner, P., König, R., Glaser, S., Raut, S., Neumayer, K. H., Schuh, H. (2022): On the potential of future observation types for the next generation GNSS, 2nd Symposium of IAG Commission 4 “Positioning and Applications”, 5–8 Sep 2022, Potsdam, Germany. doi.org/10.5194/iag-comm4-2022-23
• Raut, S., Glaser, S., Mammadaliyev, N., Schreiner, P. A., König, R., Schuh, H. (2022): Assessing the potential of VLBI transmitters on next generation GNSS satellites for geodetic products - Abstracts, IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG 2022) (Thessaloniki, Greece 2022). https://www.refag2022.org/wp-content/uploads/2022/10/23.pdf
• Raut, S., Glaser, S., Mammadaliyev, N., Schreiner, P., Neumayer, K.H., Schuh, H. (2023a): Simulations of a VLBI transmitter on next-generation GNSS, 26th European VLBI Group for Geodesy and Astronomy Working Meeting, 11 – 15 June 2023, Bad Kötzting, Germany. https://www.bkg.bund.de/SharedDocs/Downloads/BKG/DE/Downloads-Wettzell/EVGA2023-abstractbook.html
• Raut, S., Glaser, S., Mammadaliyev, N., Schreiner, P. A., König, R., Neumayer, K.H., Schuh, H. (2023b): Investigation of VLBI transmitter on a next-generation GNSS constellation: A simulation study, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG), 11-20 July 2023, Berlin, Germany. https://doi.org/10.57757/IUGG23-1601
• Schreiner, P., König, R., Glaser, S., Raut, S., Neumayer, K.H., Schuh, H. (2023): On the potential of accelerometers for GNSS satellite precise orbit determination, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG), 11-20 July 2023, Berlin, Germany. doi.org/10.57757/IUGG23-3393
• Raut, S., Glaser, S., Mammadaliyev, N., Schreiner, P., Neumayer, K.H., Schuh, H. (2023c). Assessing the Potential of VLBI Transmitters on Next Generation GNSS Satellites for Geodetic Products. In: International Association of Geodesy Symposia, Springer, Berlin, Heidelberg. https://doi.org/10.1007/1345_2023_217
• Raut, S., Glaser, S., Schreiner, P., Neumayer, K.H., Mammadaliyev, N., Schuh, H. (2024a): Assessing the capabilities of a VLBI transmitter on next-generation GNSS with VGOS network, 13th General Meeting of the International VLBI Service for Geodesy and Astrometry (IVS) & 25th Anniversary Tsukuba, 4 - 9 March 2024, Tsukuba, Japan. https://pcojapan-online.com/uploads/%E3%80%90IVS%E3%80%91Abstracts0226.pdf
• Schreiner, P., Glaser, S., König, R., Neumayer, K. H., Raut, S., and Schuh, H. (2024a): On the potential of highly accurate clocks and inter-satellite clock synchronization for GNSS satellite precise orbit and geocenter determination, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-16139. https://doi.org/10.5194/egusphere-egu24-16139
• Raut, S., Glaser, S., Schreiner, P., Neumayer, K. H., Mammadaliyev, N., and Schuh, H. (2024b): Long-term geodetic product assessment derived from a VLBI transmitter on Next-Generation GNSS, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-15350. https://doi.org/10.5194/egusphere-egu24-15350
• Schreiner, P., Glaser, S., König, R., Neumayer, K.H., Raut, S., Schuh, H. (2024b): On the Potential of Accelerometers for GNSS on Satellite Positioning and Ensuing Reference Frame Determination. In: International Association of Geodesy Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/1345_2024_270
• Raut, S., Glaser, S., Schreiner, P., Neumayer, K.H., Mammadaliyev, N., Schuh, H. (2024c): Benefits of VLBI observations to Next-Generation GNSS satellites, 16th European VLBI Network Symposium and Users Meeting, 2 - 6 September 2024, Bonn, Germany. https://events.mpifr-bonn.mpg.de/indico/event/371/session/20/contribution/76
• Schreiner, P., Glaser, S., König, R., Neumayer, K. H., Raut, S., and Schuh, H. (2024c): Advancing GNSS through Innovative Observation Types: Results from a Simulation of a Galileo-like Constellation, 9th International Colloquium on Scientific and Fundamental Aspects of GNSS, 25 - 27 September 2024, Wrocław, Poland

Link to GEPRIS (DFG): gepris.dfg.de/gepris/projekt/451901242