DOI QR코드

DOI QR Code

Elimination of Clock Jump Effects in Low-Quality Differential GPS Measurements

  • Kim, Hee-Sung (School of Electronics and Telecomm., Korea Aerospace Univ.) ;
  • Lee, Hyung-Keun (School of Electronics and Telecomm., Korea Aerospace Univ.)
  • 투고 : 2011.03.15
  • 심사 : 2012.01.10
  • 발행 : 2012.07.01

초록

Most of single frequency GPS receivers utilize low-quality crystal oscillators. If a lowquality crystal oscillator is utilized as the time reference of a GPS receiver, the receiver's clock bias grows very fast due to its inherent low precision and poor stability. To prevent the clock bias becoming too large, large clock jumps are intentionally injected to the clock bias and the time offset for clock steering purpose. The abrupt changes in the clock bias and the time offset, if not properly considered, induce serious accuracy degradation in relative differential positioning. To prevent the accuracy degradation, this paper proposes an efficient and systematic method to eliminate the undesirable clock jump effects. Experiment results based on real measurements verify the effectiveness of the propose method.

키워드

참고문헌

  1. T. K. Yeh, C. Hwang, G. Xu, C. S. Wang, and C. C. Lee, "Determination of global positioning system (GPS) receiver clock errors: impact on positioning accuracy", Measurement Science and Technology, vol. 20, no. 7, pp.1-7, 2009.
  2. NovAtel Inc., OEM4 Family of Receivers User Manu-al - Vol. 2 Command and Log Reference. OM- 200000-47, rev. 12, Alberta, Canada, 2003.
  3. A. Q. Le and C. Tiberius, "GPS Standard Positioning Service how good is it?", European Journal of Navigation, vol. 1, no. 2, pp.21-27, 2003.
  4. Septentrio, PolaRx2/2e User Manual, rev. 0, Jan. 2007.
  5. H. S. Kim and H. K. Lee, "Compensation of Time Alignment Error in Heterogeneous GPS Receivers", Proceedings of IAIN World Congress, Stockholm, Oct. 2009.
  6. D. Odijk, J. Traugott, G. Sachs, O. Montenbruck, and C. Tiberius, "Two Approaches to Precise Kinematic GPS Positioning with Miniaturized L1 Receivers", ION GNSS 2007, Fort Worth, TX, Sep. 2007.
  7. G. Werner, RINEX The Receiver Independent Exchange Format Version 2.10, ftp//igscb.jpl.nasa.gov/igscb/ -data/format/rinex210.txt, 2001.
  8. Y. Andres and O. Montenbruc, "Kalman-filter-based GPS clock estimation for near real-time Positioning", GPS Solutions, vol. 13, no. 3, pp.173-182, 2009. https://doi.org/10.1007/s10291-008-0110-3
  9. W. P. Bradford and J. S. James, Global Positioning System: Theory & Applications I, AIAA, pp.121-124, 410-411, 1996.
  10. H. K. Lee and C. Rizos, "Position-Domain Hatch Filter for Kinematic Differential GPS/GNSS", IEEE Tr. Aerospace and Electronic Systems, vol. 44, no. 1, pp. 30-40, 2008. https://doi.org/10.1109/TAES.2008.4516987

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