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Application of Independently Estimated DCB and Ionospheric TEC in Single-Frequency PPP

  • Wenfeng NieEmail author
  • Wusheng Hu
  • Shuguo Pan
  • Shengli Wang
  • Xuhui Jin
  • Bin Wang
Conference paper
  • 1.5k Downloads
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 304)

Abstract

Precise Point Positioning technology is one of the most interesting research topics within the GNSS positioning and navigation community in the last decade for a number of reasons: simplified operation, cost-effectiveness and no base stations required. With the availability of dual-frequency receivers and precise GPS products, PPP has demonstrated capable of providing centimeter to decimeter level point positioning accuracy globally. As for single-frequency PPP, the accuracy deceases, particularly in the height component. One dominant factor for this degradation is the effect of unmodeled ionospheric delay. This paper investigates PPP technique using single-frequency data as single-frequency receivers are the most widely used tools for tracking, navigation and geo-referencing. Since the unmodeled ionospheric error is the biggest error source for a single-frequency receiver based on PPP system, an ionospheric error mitigation method named POLY model based on GPS regional reference station network is introduced for the reason that it can provide independent DCB and ionospheric TEC. In addition, three other different methods, as the Klobuchar model, the GIM model and the GRAPHIC algorithm, are assessed and their accuracy compared. Numerical results show that the POLY method offers better performance than GIM method, which is able to provide approximately 0.5 m point accuracy for static positioning over 24 h observation period.

Keywords

DCB TEC Ionospheric error Single-frequency PPP 

Notes

Acknowledgments

This work was supported by Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period.(2012BAJ23B01). The authors are very grateful to the anonymous reviewers for their constructive comments and suggestions.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Wenfeng Nie
    • 1
    Email author
  • Wusheng Hu
    • 1
  • Shuguo Pan
    • 2
  • Shengli Wang
    • 2
  • Xuhui Jin
    • 1
  • Bin Wang
    • 1
  1. 1.School of Transportation of Southeast UniversityNanjingChina
  2. 2.Instrument Science and Engineering InstituteNanjingChina

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