GPS Solutions

, Volume 18, Issue 3, pp 323–333 | Cite as

Impact of GLONASS pseudorange inter-channel biases on satellite clock corrections

  • Weiwei Song
  • Wenting YiEmail author
  • Yidong LouEmail author
  • Chuang Shi
  • Yibin Yao
  • Yanyan Liu
  • Yong Mao
  • Yu Xiang
Review Article


GLONASS carrier phase and pseudorange observations suffer from inter-channel biases (ICBs) because of frequency division multiple access (FDMA). Therefore, we analyze the effect of GLONASS pseudorange inter-channel biases on the GLONASS clock corrections. Different Analysis Centers (AC) eliminate the impact of GLONASS pseudorange ICBs in different ways. This leads to significant differences in the satellite and AC-specific offsets in the GLONASS clock corrections. Satellite and AC-specific offset differences are strongly correlated with frequency. Furthermore, the GLONASS pseudorange ICBs also leads to day-boundary jumps in the GLONASS clock corrections for the same analysis center between adjacent days. This in turn will influence the accuracy of the combined GPS/GLONASS precise point positioning (PPP) at the day-boundary. To solve these problems, a GNSS clock correction combination method based on the Kalman filter is proposed. During the combination, the AC-specific offsets and the satellite and AC-specific offsets can be estimated. The test results show the feasibility and effectiveness of the proposed clock combination method. The combined clock corrections can effectively weaken the influence of clock day-boundary jumps on combined GPS/GLONASS kinematic PPP. Furthermore, these combined clock corrections can improve the accuracy of the combined GPS/GLONASS static PPP single-day solutions when compared to the accuracy of each analysis center alone.


GLONASS Clock corrections Day-boundary jump Inter-channel bias Clock combination 



We thank Simon Banville, at NRCan, and Maorong Ge, at GFZ, for their valuable suggestions on this study. The IGS is acknowledged for providing high-quality combined GPS/GLONASS precise orbit and clock corrections as well as tracking data. This study was supported by the National Natural Science Funds (Grant No. 41374034), the National High Technology Research and Development Program of China (863 Program) (Grant No. 2012AA12A202) and also by China Postdoctoral Science Foundation (Grant No. 2012M511671).


  1. Bisnath S, Gao Y (2008) Current state of precise point positioning and future prospects and limitations. In: Sideris MG (ed) Observing our changing Earth. Springer, New York, pp 615–623CrossRefGoogle Scholar
  2. Bock H, Dach R, Jäggi A, Beutler G (2009) High-rate GPS clock corrections from CODE: support of 1 Hz applications. J Geodesy 83:1083–1094CrossRefGoogle Scholar
  3. Cai C, Gao Y (2007) Performance analysis of precise point positioning based on combined GPS and GLONASS. In: Proceedings of ION GNSS-2007, Institution of Navigation, Fort Worth, Texas, September, pp 858–865Google Scholar
  4. Chuang S, Wenting Y, Weiwei S, Yidong L, Yibin Y, Rui Z (2013) GLONASS pseudorange inter-channel biases and their effects on combined GPS/GLONASS precise point positioning. GPS Solutions, GPS Solutions 17(4):439–451CrossRefGoogle Scholar
  5. Ge M, Chen J, Douša J, Gendt G, Wickert J (2012) A computationally efficient approach for estimating high-rate satellite clock corrections in realtime. GPS Solutions 16(1):9–17CrossRefGoogle Scholar
  6. Hauschild A, Montenbruck O, Steigenberger P (2013) Short-term analysis of GNSS clocks. GPS Solutions 17(3):295–307CrossRefGoogle Scholar
  7. Hesselbarth A, Wanninger L (2008) Short-term stability of GNSS satellite clocks and its effects on precise point positioning. In: Proceedings of ION GNSS-2008, Institution of Navigation, San Diego, California, September, pp 1855–1863Google Scholar
  8. Kouba J (2003) A guide to using International GPS Service (IGS) products. IGS report, International GPS ServiceGoogle Scholar
  9. Kouba J, Héroux P (2001) Precise point positioning using IGS orbit and clock products. GPS Solut 5(2):12–28CrossRefGoogle Scholar
  10. Kouba J, Springer T (2001) New IGS station and satellite clock combination. GPS Solut 4(4):31–36CrossRefGoogle Scholar
  11. Kozlov D, Tkachenko M, Tochilin A (2000) Statistical characterization of hardware biases in GPS + GLONASS receivers. In: Proceedings of ION GPS-2000, U.S. Institution of Navigation, Salt Lake City, Utah, September, pp 817–826Google Scholar
  12. Mervart L, Weber G (2011) Real-time combination of GNSS orbit and clock correction streams using a Kalman filter approach. In: Proceedings of ION GNSS-2011, Institution of Navigation, Portland OR, September, pp 707–711Google Scholar
  13. Píriz R, Calle D, Mozo A, Navarro P, Rodríguez D, Tobías G (2009). Orbits and clocks for GLONASS precise-point-positioning. In: Proceedings of ION GNSS-2009, Institution of Navigation, Savannah, Georgia, September, pp 2415–2424Google Scholar
  14. Reussner N, Wanninger L (2011) GLONASS inter-frequency biases and their effects on RTK and PPP carrier-phase ambiguity resolution. In: Proceedings of ION GNSS-2011, Institution of Navigation, Portland OR, September, pp 712–716Google Scholar
  15. Wanninger L (2012) Carrier phase inter-frequency biases of GLONASS receivers. J Geodesy 86(2):139–148CrossRefGoogle Scholar
  16. Zhang X, Li X, Guo F, Li P, Wang L (2010) Server-based real-time precise point positioning and its application. Chin J Geophys Chin Edit 53(6):1308–1314Google Scholar
  17. 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 102(B3):5005–5017CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Research Center of GNSSWuhan UniversityWuhanChina
  2. 2.School of Geodesy and GeomaticsWuhan UniversityWuhanChina
  3. 3.PetroChina West East Gas Pipeline CompanyShanghaiChina

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