PERFORMANCE EVALUATION OF REAL TIME PRECISE POINT POSITIONING FOR MULTI-GNSS CONCEPT

Year 2020, Volume: 38 Issue: 4, 2231 - 2244, 05.10.2021

Furkan Karlıtepe Nursu Tunalıoğlu Tunalıoğlu Bahattin Erdoğan

Abstract

Today, Precise Point Positioning (PPP) technique is at the forefront of the Global Navigation Satellite Systems (GNSS) based point positioning in many applications. In particular, GNSS-based real-time PPP (RT-PPP) applications are significant for next-generation autonomous systems and geospatial industries. However, real-time corrections are required for these applications. Since 2003, International GNSS Service (IGS) has been preparing substructure for multi-GNSS applications within the context of multi-GNSS Experiment (MGEX) Project. In this study, two IGS MGEX stations were selected. These are equipped with GPS, GLONASS, Galileo and BeiDou systems’ receivers, and provide real-time solutions. Then, eight scenarios were generated depending on the different satellite combinations. These scenarios were examined in terms of convergence time and positioning accuracy, and the performance of different satellite systems in RT-PPP analyses was revealed. BNC v2.12.6 software was used for all analyses. Regarding the results, it can be concluded that using the different satellite combinations results in shortening the convergence time in RT-PPP and increasing the positioning accuracy.

Keywords

Multi-GNSS, Real-Time PPP (RT-PPP), IGS MGEX, combined positioning, convergence time.

References

• [1] Zumberge, J., Heflin, M., Jefferson, D., Watkins, M., Webb, F. (1997) Precise point positioning for the efficient and robust analysis of GPS data from large networks, J Geophys Res 102(B3),5005–5017.
• [2] Erdogan, B., Karlitepe, F., Ocalan, T., Tunalioglu, N. (2018) Performance analysis of Real Time PPP for transit of Mercury, Measurement, 129, 358-367.
• [3] Lipatnikov, L.A., Shevchuk, S.O. (2019) Cost Effective Precise Positioning with GNSS, The International Federation of Surveyors (FIG), Publication No: 74, March 2019.
• [4] Aggrey, J., Bisnath, S., Naciri, N., Shinghal, G., Yang, S. (2020) Multi-GNSS precise point positioning with next-generation smartphone measurements, Journal of Spatial Science, 65 (1), 79-98.
• [5] Ocalan, T., Erdogan, B., Tunalioglu, N., Durdag, U.M. (2016) Accuracy Investigation of PPP Method Versus Relative Positioning Using Different Satellite Ephemerides Products Near/Under Forest Environment, Earth Sciences Research Journal, 20 (4), D1-D4.
• [6] Bisnath S., Gao Y. (2009) Current State of Precise Point Positioning and Future Prospects and Limitations. In: Sideris M.G. (eds) Observing our Changing Earth. International Association of Geodesy Symposia, vol 133. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85426-5_71
• [7] Li, X., Ge, M., Zhang, H., Wickert, J. (2013) A method for improving uncalibrated phase delay estimation and ambiguity-fixing in real-time precise point positioning, Journal of Geodesy, 87(5), 405-416.
• [8] Wübbena, G., Schmitz, M., Bagge, A. (2005) PPP-RTK: precise point positioning using state-space representation in RTK networks. ed. the 18th International Technical Meeting of the Satellite Division (ION GNSS), 13-16 September, Long Beach, California, 2584–2594.
• [9] Choy, S., Harima, K. (2019) Satellite delivery of high-accuracy GNSS precise point positioning service: an overview for Australia, Journal of Spatial Science, 64 (2), 197-208.
• [10] IGS-RTS. (2020). Real Time Data (Overview) [online]. Available from: https://www.igscb.org/real-time-intro/ [Accessed May 2020].
• [11] Sapcorda. (2020) Safe Position Augmentation for Real Time Navigation (SPARTN) format Interface Control Document Version 1.8.0 Scottsdale, January 2020 [online]. Available from: https://www.spartnformat.org/ [Accessed May 2020].
• [12] Geo++. (2020). Geo++ State Space Representation Compressed Format (SSRZ) document [online]. Available from: http://www.geopp.de/ [Accessed May 2020].
• [13] IGS-MGEX. (2020). IGS The Multi-GNSS Experiment and Pilot Project (MGEX) [online]. Available from: http://mgex.igs.org/ [Accessed May 2020].
• [14] Fu, W., Huang, G., Yang, Y., Zhang, Q., Cui, B., Ge, M., Schuh, H. (2019) Multi-GNSS Combined Precise Point Positioning Using Additional Observations with Opposite Weight for Real-Time Quality Control, Remote Sens. 2019, 11, 311.
• [15] Chen, J, Zhang, Y., Wang, J., Yang, S., Dong, D., Wang, J., Qu, W., Wu, B. (2015) A simplified and unified model of multi-GNSS precise point positioning, Advances in Space Research, 55 (1), 125-134.
• [16] Paakki, T. (2017) Next Generation Multi-System Multi-Frequency GNSS Receivers, Tampere University of Technology. Publication; Vol. 1488.
• [17] Liu, T., Zhang, B., Yuan, Y., Zha, J., Zhao, C. (2019) An efficient undifferenced method for estimating multi-GNSS high-rate clock corrections with data streams in real time, Journal of Geodesy, 93, 1435–1456.
• [18] Fu, W., Huang, G., Zhang, Q., Gu, S., Ge, M. & Schuh, H. (2019b). Multi-GNSS real-time clock estimation using sequential least square adjustment with online quality control, Journal of Geodesy, 93, 963–976.
• [19] Kazmierski, K., Sośnica, K., Hadas, T. (2018) Quality assessment of multi-GNSS orbits and clocks for real-time precise point positioning, GPS Solution, 22, 11.
• [20] Weber, G., Mervart L., Stürze A., Rülke A., Stöcker D., (2016) BKG Ntrip Client, Version 2.12. Mitteilungen des Bundesamtes für Kartographie und Geodäsie, Vol. 49, Frankfurt am Main.
• [21] BKG GNSS Data Center, RTCM Version 3 message types. https://igs.bkg.bund.de/ntrip/rtcmmessagetypes, [accessed May 2020].
• [22] Wessel, P. & Smith, W.H.F. (1998). New improved version of Generic Mapping Tools Released, EOS Trans. AGU, 79 (47) 579.