Abstract
Global Navigation Satellite System (GNSS) based Precise Point Positioning (PPP) has become the de facto standard for precise real-time offshore positioning applications. Current precision is of the order of 3−5 cm horizontally and twice this value for the vertical. However, this may not yet be good enough for tidal applications. In this contribution we will discuss new developments at Fugro, one of the world’s main providers of precise offshore real-time GNSS positioning services, to further improve PPP precision to the 2−3 cm level in the vertical component worldwide. For demanding applications, it is possible to even further improve this precision. These developments are based on merging PPP techniques (use of precise satellite orbits and clocks) with Integer Ambiguity Resolution (IAR), known from GNSS Real-Time Kinematic (RTK) positioning techniques. PPP IAR requires the generation and distribution to mobile users of Uncalibrated Phase Delays (UPDs) a network of reference stations. The network can be as small as one station or cover the entire globe. Once applied to the data of a mobile receiver, the carrier ambiguities should be integer. Fixing of these ambiguities to their proper integer value will result in significantly improved positioning performance. The infrastructure used to generate precise orbits, clocks and UPDs will be discussed. PPP IAR results will be shown from regional and global test beds, based on Fugro’s precise orbits and clocks for all currently available GNSSs. In addition, it will be shown that the introduction of new systems and signals, like triple-frequency GPS, Galileo and BeiDou, will help to significantly reduce the time required for PPP IAR solutions to converge to this centimeter level of accuracy.
Kees de Jong—Deceased
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Collins, P., Lahaye, F., Héroux, P., & Bisnath, S. (2008). Precise point positioning with ambiguity resolution using the decoupled clock model. Proceedings ION GNSS 2008, 1315–1322.
de Jonge, P.J. (1998). A processing strategy for the application of the GPS in networks. Ph.D. thesis, Delft University of Technology, pp. xi−225.
de Jonge, P.J., Tiberius, C.C.J.M. (1996). The LAMBDA method for integer ambiguity estimation: implementation aspects. Publications of the Delft Geodetic Computing Centre, LGR series, 12, pp. v−49.
Ge, M., Gendt, G., Rothacher, M., Shi, C., & Liu, J. (2008). Resolution of GPS carrier-phase ambiguities in precise point positioning (PPP) with daily observations. Journal of Geodesy, 82, 389–399.
GPS World (2013). Real-time PPP with Galkleo demonstrated by Fugro. GPS World, Mar 2013, http://gpsworld.com/real-time-ppp-with-galileo-demonstrated-by-fugro/. Accessed 16 Sept 2014.
Kouba, J. (2009). A guide to using International GNSS Service (IGS) products. International GNSS Service, pp. 34.
Laurichesse, D., & Mercier, F. (2007). Integer ambiguity resolution on undifferenced GPS phase measurements and its application to PPP. Proceedings ION GNSS, 2007, 839–848.
Teunissen, P. J. G. (1995). The least-squares ambiguity decorrelation adjustment: A method for fast GPS integer ambiguity estimation. Journal of Geodesy, 70, 65–82.
Teunissen, P. J. G. (1998). Success probability of integer GPS ambiguity rounding and bootstrapping. Journal of Geodesy, 72, 606–612.
Teunissen, P. J. G., Odijk, D., & Zhang, B. (2010). PPP-RTK: Results of CORS network-based PPP with integer ambiguity resolution. Journal of Aeronautics, Astronautics and Aviation, Series A, 42, 223–230.
Zumberge, J. F., Heflin, M. B., Jefferson, D. C., Hefkins, M. M., & Webb, F. H. (1997). Precise point positioning for the efficient and robust analysis of GPS data from large networks. Journal of Geophysical Research, 102(B103), 5005–5017.
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de Jong, K., Goode, M., Liu, X., Stone, M. (2016). New Developments in Precise Offshore GNSS Positioning. In: Zerr, B., et al. Quantitative Monitoring of the Underwater Environment. Ocean Engineering & Oceanography, vol 6. Springer, Cham. https://doi.org/10.1007/978-3-319-32107-3_1
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DOI: https://doi.org/10.1007/978-3-319-32107-3_1
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