Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
권호 표지
DOI QR코드

DOI QR Code

Correlation between the Position Accuracy of the Network RTK Rover and Quality Indicator of Various Performance Analysis Method

Network RTK 품질 분석 방법론별 성능 지표와 사용자 항법 정확도의 상관성

  • 임철순 (세종대학교 항공우주공학과) ;
  • 박병운 (세종대학교 항공우주공학과) ;
  • 허문범 (한국항공우주연구원 항법기술연구실)
  • Received : 2018.08.23
  • Accepted : 2018.10.29
  • Published : 2018.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

In order to apply the Network RTK (real time kinematics) technology, which has been used for positioning of stationary points, to the navigation of vehicles, its infrastructure should provide correction data with a quality indicator that can show the expected accuracy in real time. In this paper, we analyzed various indicator generation algorithms such as I95 (ionospheric index 95) / G95 (geodetic index 95), SBI (semivariance based index) and RIU (residual interpolation uncertainty). We also applied them to the raw observables from the reference stations of National Geographic Information Institute and VRS (virtual reference station) users, and then examined its feasibility to be used as a real-time performance index of the Network RTK rover. 24 hour data analysis shows that the RIU index, which can represent the non-linearty of the correction, has the strongest correlation with the Network RTK rover accuracy. Therefore, RIU index is expected to be used as a real-time performance index of the Network RTK rover.

정지한 객체의 측위에 사용되던 Network RTK (real time kinematics) 기술을 이동형 항체의 항법에 적용하기 위해서는 보정정보와 함께 사용자의 성능을 대표할 수 있는 지표가 함께 제공되어야 한다. 이를 위하여 본 논문에서는 I95 (ionospheric index 95) / G95 (geodetic index 95), SBI (semivariance based index), RIU (residual interpolation uncertainty) 등의 지표 도출 알고리즘을 분석하고 이를 국토지리정보원의 기준국 원시 데이터와 VRS (virtual reference station) 사용자에 적용함으로써 정밀 항법 성능 지표로의 활용 가능성을 타진하였다. 24시간 데이터를 처리한 결과 보정정보의 비선형성을 나타낼 수 있는 RIU 지표와 Network RTK 사용자의 위치 정확도와의 상관성이 0.52로 타 지표에 비해 훨씬 높은 것으로 나타났으므로 향후 이동 항체의 항법 성능 지표로 사용이 가능할 것으로 예상된다.

Keywords

References

  1. U. Vollath, H. Landau, X. Chen, "Network RTK-concept and performance," in Proceedings of the 15th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GPS 2002), Portland: OR, pp. 24-27 Sept. 2002.
  2. J. S. Song, B. W. Park and C. D. Kee, "Study on generating compact Network RTK corrections considering ambiguity level adjustment among reference station networks for constructing infrastructure of land vehicle," Journal of Advanced Navigation Technology, Vol. 17, No. 4, pp. 404-412, 2013 https://doi.org/10.12673/jkoni.2013.17.4.404
  3. B. W. Park, "A study on reducing temporal and spatial decorrelation effect in GNSS augmentation system: consideration of the correction message standardization," Ph. D. dissertation, Seoul National University, Seoul, Korea, Feb. 2008.
  4. P. Joosten and C. Tiberius, “LAMBDA: FAQs,” GPS Solutions, Vol. 6, No. 1-2, pp. 109-114, 2002. https://doi.org/10.1007/s10291-002-0004-8
  5. L. Dai , S. Han, J. Wang and C. Rizos. "Comparison of interpolation algorithms in network-based GPS techniques," Journal of the Institute of Navigation, Vol. 50, Np. 4, pp. 277-293, 2004.
  6. H. J. Euler, S. Seeger, O. Zelzer, F. Takac and B. E. Zebhauser, "Improvement of positioning performance using standardized Network RTK messages," in Proceedings of the 2004 National Technical Meeting of The Institute of Navigation, San Diego: CA, pp. 453-461, Jan. 2004.
  7. C. Varner, "DGPS carrier phase networks and partial derivative algorithms", Ph.D. dissertation, University of Calgary, Calgary, Canada. 2002.
  8. L. Wanninger, "The performance of virtual reference stations in active geodetic GPS-network under solar maximum conditions," in Proceedings of the 12th International Technical Meeting of the Satellite Division of the Institute of Navigation ION GPS 1999, Nashville: TN, pp. 1419-1427, 1999.
  9. N. S. Kjorsvik, "A semivariance-based index for spatially correlated errors in rapid differential GNSS applications," GPS Solutions, Vol. 8, No. 4, pp. 217-225, 2004 https://doi.org/10.1007/s10291-004-0111-9
  10. D. Prochniewicz, R. Szpunar, J. Walo, "A new study of describing the reliability of GNSS Network RTK positioning with the use of quality indicator," Measurement Science and Technology, Vol. 28, No. 10, pp. 1-14, 2016
  11. D. H. Han, C. S. Park, D. H. Hwang, S. J. Lee, "Characteristics of the float solutions in epoch-by-epoch GNSS precise positioning", Journal of Institute of Control, Robotics, and Systems, Vol. 15, No. 12, pp. 1254-1257, 2009 https://doi.org/10.5302/J.ICROS.2009.15.12.1254

Cited by

  1. Performance Expectation of Single Station PPP-RTK using Dual-frequency GPS Measurement in Korea vol.10, pp.3, 2018, https://doi.org/10.11003/jpnt.2021.10.3.159
  2. A Review on the Usage of RTKLIB for Precise Navigation of Unmanned Vehicles vol.10, pp.4, 2018, https://doi.org/10.11003/jpnt.2021.10.4.243