Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
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Times Series Analysis of GPS Receiver Clock Errors to Improve the Absolute Positioning Accuracy

  • Bae, Tae-Suk (Department of Civil and Environmental Engineering and Geodetic Science, The Ohio state University) ;
  • Kwon, Jay-Hyoun (Department of Geoinformatics, University of Seoul)
  • Published : 2007.12.31
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Abstract

Since the GPS absolute positioning with pseudorange measurements can significantly be affected by the observation error, the time series analysis of the GPS receiver clock errors was performed in this study. From the estimated receiver clock errors, the time series model is generated, and constrained back in the absolute positioning process. One of the CORS (Continuously Operating Reference Stations) network is used to analyze the behavior of the receiver clock. The dominant part of the model is the linear trend during 24 hours, and the seasonal component is also estimated. After constraining the modeled receiver clock errors, the estimated position error compared to the published coordinates is improved from ${\pm}11.4\;m\;to\;{\pm}9.5\;m$ in 3D RMS.

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References

  1. Brockwell, P.J. and R.A. Davis (2002). Introduction to Time Series and Forecasting (2nd), Springer, New York
  2. Han, S.-C., J.R. Kwon and C. Jekeli (2001). Accurate absolute GPS positioning through satellite clock error estimation. Journal of Geodesy, Vol. 75, No. I, pp. 33-43 https://doi.org/10.1007/s001900000151
  3. Hofmann-Wellenhof, B., H. Lichtenegger and J. Collins (2004). GPS: Theory and Practice (5th). Springer-Verlag New York
  4. Oaks, J., K. Senior, M. Largay, R. Beard and J. Buisson (2005). NRL Analysis of GPS On-Orbit Clocks. Frequency Control Symposium and Exposition, 2005, IEEE International, pp. 12-18
  5. Remondi, B.W. (2004). Computing satellite velocity using the broadcast ephemeris. GPS Solution, Vol. 8, No. 3, pp. 181-183 https://doi.org/10.1007/s10291-004-0094-6
  6. Seeber, G. (2003). Satellite Geodesy (2nd). Walter de Gruyter, Berlin, New York
  7. Wright, J.R. (2007). GPS Composite Clock Analysis. Frequency Control Symposium, 2007 Joint with the 21 st European Frequency and Time Forum, IEEE International, pp. 523-528