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The wide-area difference system for the regional satellite navigation system of COMPASS

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The regional satellite navigation system of COMPASS (Phase I) provides both open services and authorized services. Authorized services offer differential corrections and integrity information to users to support higher positioning, navigation and timing precision. Experimenting with real data, positioning accuracy is estimated with a 3GEO/4IGSO COMPASS constellation. The results show that with dual-frequency and single-frequency pseudo-range measurements, the positioning errors are respectively 8 and 10 m (RMS) for open service users, while for authorized users, the errors are 4 and 5 m (RMS), respectively. The COMPASS constellation geometry may cause large error to occur in the height component by 7–9 m for dual-or single-frequency users, which can be effectively reduced with the differential corrections supplied by the authorized services. Multipath errors are identified and corrected for COMPASS, resulting in 25% positioning accuracy improvement for dual-frequency users and 10% improvement for single-frequency users.

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  1. Hein G W. From GPS and Glonass via GENOS to Galileo-positioning and navigation in the third millennium. GPS Solut, 2000, 3(4): 39–47

    Article  Google Scholar 

  2. Song W L, Tan S S. The current status and development of WAAS technique (in Chinese). Radio Eng China, 2007, 37(6): 50–52

    Google Scholar 

  3. Ashley W L, Umberto G, Fernandez J L. EGNOS: A step closer to operational qualification. In: Proceedings of the 19th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS). Fort Worth: Fort Worth Convention Center, 2006. 906–912

    Google Scholar 

  4. Zhou S S, Hu X G, Wu B, et al. Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tephemeris and clock algorithms racking network. Sci China-Phys Mech Astron, 2011, 54: 1089–1097

    Article  ADS  Google Scholar 

  5. Chen J P. Research of GPS Integrity Augmentation (in Chinese). Dissertation for Doctoral Degree. Zhengzhou: Institute of Surveying and Mapping Information Engineering University, 2001

    Google Scholar 

  6. Wen R H, Feng X C. Research on time delay characteristic of parabolic antenna along with temperature variety (in Chinese). Radio Eng, 2010, 40(6): 42–44

    Google Scholar 

  7. Allain D J, Mitchell C N. Ionospheric delay corrections for single-frequency GPS receivers over Europe using tomographic mapping. GPS Sol, 2009, 13(2): 141–151

    Article  Google Scholar 

  8. Feng X C, Cheng X B, Gao S, et al. The study of analysis methods for multipath effect of GNSS receiver’s measurement data (in Chinese). GNSS World China, 2010, 01: 11–15

    Google Scholar 

  9. Huang S L, WU X L, Liu L, et al. Separation solution methods of TGD and IFB for compass system (in Chinese). Geom Sci Eng, 2010, 03: 28–32

    Google Scholar 

  10. Zhang H P, Ping J S, Zhu W Y, et al. Brief review of the ionospheric delay models (in Chinese). Prog Astron, 2006, 24(1): 16–26

    ADS  Google Scholar 

  11. Wu X L, Ping J S, Liu L, et al. Hardware delay solution of regional satellite navigation system (in Chinese). Geom Inform Sci Wuhan Univ, 2011, 36(10): 1218–1221

    Google Scholar 

  12. Jiao W H, Ding Q, Li J W, et al. Monitoring and assessment of GNSS open services (in Chinese). Sci Sin-Phys Mech Astron, 2011, 41: 521–527

    Article  Google Scholar 

  13. Zhu L F, Tang B, Li C. Analysis on performances of the two models for satellite clock error prediction (in Chinese). J Spacecr TT&C Technol, 2007, 26(3): 39–43

    Google Scholar 

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Correspondence to YueLing Cao or XiaoGong Hu.

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Recommended by ZHOU JiLin (Associate Editor)

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Cao, Y., Hu, X., Wu, B. et al. The wide-area difference system for the regional satellite navigation system of COMPASS. Sci. China Phys. Mech. Astron. 55, 1307–1315 (2012).

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