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FCB Estimation Using IGS Real-Time Products and Its Application in Precise Point Positioning

  • Bo Jiao
  • Yishuai Shi
  • Jinming Hao
  • Cheng Fang
  • Xufeng Wen
  • Baofeng Song
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 498)

Abstract

Real-time capability , positioning accuracy and convergence time ar e the keys to the performance of Precise Point Positioning (PPP). In recent years, the development of IGS Real-Time Services (RTS) has improved the performance of real-time PPP to a large extent. Meanwhile, the PPP ambiguity resolution technique, which significantly improves the positioning accuracy and convergence time, has become mature gradually. If the advantages of both techniques can be combined to realize real-time PPP with ambiguity resolution, the application of PPP would be greatly expanded. In this paper, a real-time satellite-satellite single-difference fractional cycle bias (FCB) estimation method based on RTS products is proposed. To meet the demand of real-time PPP, narrow-lane FCBs are forecasted by short-term linear extrapolation. Taking accuracy levels and data amount into consideration, the forecasting interval for real-time wide-lane and narrow-lane FCBs are determined. Finally, the performance of real-time PPP with ambiguity resolution using real-time FCBs is evaluated in both static and kinematic modes. The results show that wide-lane FCBs to be forecasted daily and narrow-lane FCBs to be forecasted every 5 min can satisfy the need of real-time PPP with ambiguity resolution. In static mode, the average time to first fix (TTFF) is 15.97 min, and the average precision of the north, east and up components for hourly solution are 1.51, 1.64 and 2.18 cm respectively. As for kinematic mode, an average TTFF of 24.36 min is needed, and the 3D position error in fixed solution is decreased by 42.59% compared with float solution.

Keywords

Precise point positioning Fractional cycle bias Ambiguity resolution Real-time solution Least square fit 

Notes

Acknowledgements

This research work was supported by the Natural Science Foundation of China (41604032).

References

  1. 1.
    Zumberge JF, Heflin MB, Jefferson DC, Watkins MM, Webb FH (1997) Precise point positioning for the efficient and robust analysis of GPS data from large networks. J Geophys Res Solid Earth 102(B3):5005–5017CrossRefGoogle Scholar
  2. 2.
    Dow JM, Neilan RE, Rizos C (2007) The International GNSS service (IGS): preparations for the coming decade. Bulletin of the American Astronomical SocietyGoogle Scholar
  3. 3.
    Caissy M, Agrotis L, Weber G, Fisher S (2013) The IGS real-time service. EGU General Assembly, 07–12 Apr. 2013, Vienna AustriaGoogle Scholar
  4. 4.
    Hadas T, Bosy J (2015) IGS RTS precise orbits and clocks verification and quality degradation over time. GPS Solutions 19(1):93–105CrossRefGoogle Scholar
  5. 5.
    Wubbena G, Schmitz M, Bagge A (2005) PPP-RTK: precise point positioning using state-space representation in RTK Networks. ION GNSS 2005, Long Beach, CA, September 2584–2594Google Scholar
  6. 6.
    Gebhard H, Weber G (2003) NTRIP: networked transport of RTCM via internet protocol—internet radio technology for real-time GNSS purposes. AGU Fall Meeting. AGU Fall Meeting AbstractsGoogle Scholar
  7. 7.
    Li P (2016) Research on methodology of rapid ambiguity resolution for GNSS precise point position. Wuhan University, WuhanGoogle Scholar
  8. 8.
    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. J Geodesy 82(7):389–399CrossRefGoogle Scholar
  9. 9.
    Laurichesse D, Mercier F, Berthias JP, Broca P, Cerri L (2009) Integer ambiguity resolution on indifference GPS phase measurements and its application to PPP and satellite precise orbit determination. Navigation 56(2):135–149CrossRefGoogle Scholar
  10. 10.
    Collins P, Bisnath S, Lahaye F et al (2010) Undifferenced GPS ambiguity resolution using the decoupled clock model and ambiguity Datum fixing. Navigation 7(2):123–135CrossRefGoogle Scholar
  11. 11.
    Laurichesse D (2011) The CNES Real-time PPP with undifferenced integer ambiguity resolution demonstrator. Proc Int Tech Meeting Satellite Div Inst Navig 10(1):654–662Google Scholar
  12. 12.
    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. J Geodesy 87(5):405–416CrossRefGoogle Scholar
  13. 13.
    Shao K, Gu D, Tu X, Duan X, Liu H (2016) Applications of IGS real-time products in precise point positioning and LEO satellites precise orbit determination. China satellite navigation conference (CSNC), ChangshaGoogle Scholar
  14. 14.
    Wang J, Zhou L, Jiang T, Sun G (2014) A simple linear fitting method based on weighted total least square. Bull Surveying Mapp 4:33–35Google Scholar
  15. 15.
    International GNSS Service (IGS). IGS Real-time Service. http://www.igs.org/rts/products/. Accessed 12 June 2016
  16. 16.
    National Aeronautics and Space Administration (NASA). igc orbits and clocks [DB/OL]. ftp://cddis.gsfc.nasa.gov/gps/products/rtpp/1967/. Accessed 17 Sept 2017
  17. 17.
    Zhang X, Li P, Guo F (2013) Ambiguity resolution in precise point positioning with hourly data for global single receiver. Adv Space Res 51(1):153–161CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Bo Jiao
    • 1
  • Yishuai Shi
    • 1
  • Jinming Hao
    • 1
  • Cheng Fang
    • 1
  • Xufeng Wen
    • 1
  • Baofeng Song
    • 1
  1. 1.Information Engineering UniversityZhengzhouChina

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