Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
권호 표지
DOI QR코드

DOI QR Code

Performance Verification of Psudolite-based Augmentation System Using RF signal logger and broadcaster

RF 신호 수집/방송 장치를 활용한 의사위성 기반 광역보정시스템의 후처리 성능 검증

  • Han, Deok-Hwa (Mechnanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University) ;
  • Yun, Ho (Mechnanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University) ;
  • Kim, Chong-Won (Mechnanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University) ;
  • Kim, O-Jong (Mechnanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University) ;
  • Kee, Chang-Don (Mechnanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University)
  • 한덕화 (서울대학교 기계항공공학부, 항공우주신기술 연구소) ;
  • 윤호 (서울대학교 기계항공공학부, 항공우주신기술 연구소) ;
  • 김종원 (서울대학교 기계항공공학부, 항공우주신기술 연구소) ;
  • 김오종 (서울대학교 기계항공공학부, 항공우주신기술 연구소) ;
  • 기창돈 (서울대학교 기계항공공학부, 항공우주신기술 연구소)
  • Received : 2014.07.08
  • Accepted : 2014.08.26
  • Published : 2014.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

Wide Area Differential GNSS(WA-DGNSS) was developed in order to improve the accuracy and integrity performance of GNSS. In this paper, overall structure of Pseudolite-Based Augmentation System(PBAS) and experimental methods which enables the post-processing test with commercial receiver will be described. For generating augmenting message, GPS measurement collected from five NDGPS reference stations were processed by reference station S/W and master station S/W. The accuracy of augmenting message was tested by comparing SP3, IONEX data. In the test, RF signal of user was collected and correction data were generated. After that, RF signal was broadcasted with pseudolite signal. Test was conducted using three commercial receiver and the performance was compared with MSAS and standalone user. From the position output of each receiver, it was shown that improved position was obtained by applying augmenting message.

광역보정시스템은 GPS와 같은 위성항법을 이용하는 사용자의 정확성, 무결성을 개선시키기 위하여 고안된 시스템이다. 본 논문에서는 개발된 의사위성 기반의 광역보정시스템의 전체 구조에 대하여 설명하고, 후처리 기반으로 상용 수신기에 대하여 성능 테스트를 수행하는 실험 방법 및 결과에 대하여 설명한다. 보정정보 생성을 위하여 총 5개의 NDGPS 기준국에서 수집되는 데이터가 활용되었으며 이를 광역기준국, 중앙처리국 소프트웨어에서 처리하였다. 생성된 보정정보는 SP3, IONEX 데이터와 비교하여 정확도를 테스트하였다. 상용 수신기 실험에서는 사용자의 RF 신호를 수집, 보정정보를 생성하였으며, 이후에 RF신호와 보정정보가 실린 의사위성 신호를 동시에 방송하여 테스트를 수행하였다. 테스트는 3대의 상용수신기를 활용하여 수행되었으며 MSAS, GPS 단독 측위 수신기와 비교하여 성능을 검증하였다. 각 수신기의 위치해 출력 결과로부터 위치오차를 비교하였으며 보정정보를 적용함으로써 향상된 위치해가 출력됨을 확인하였다.

Keywords

References

  1. Chao Y.(1997), "Real Time Implementation of the Wide Area Augmentation System for the Global Positioning System with an emphasis on Ionospheric Modeling", Ph.d. thesis, Stanford University
  2. Electronic Navigation Research Institute(2014), MSAS augmenting message log file, http://www.enri.go.jp/-sakai/pro.htm
  3. Han D. H., Yun H. and Kee C. D.(2013), "Performance analysis of WA-DGNSS in Korea with the selection of reference stations", Journal of Korean Navigation and Port Research, Vol. 37, No. 4, pp. 367-373. https://doi.org/10.5394/KINPR.2013.37.4.367
  4. Han D. H., Yun H., Kim C. W., Kim O. J., and Kee C. D.(2014), "Korean SBAS Development Progress and TEST Results of Pseudolite-Based Demo System", Proceedings of the 2014 International Technical Meeting of The Institute of Navigation, 2014, pp.219-222
  5. Kim D. Y.(2007), "A Study on correction generation algorithms for wide area differential GNSS", Ph.d. thesis, Seoul national university
  6. Lee Y. C.(2002), "A Comparison of Correction Models for the Prediction of Tropospheric Propagation Delay of GPS Signals", Jounal of Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography, Vol. 20, No. 3, pp. 283-291
  7. RTCA SC-159(2006), Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment, RTCA publication DO-229D.
  8. Ruizhi Chen, A. H., Yewei Chen, Marten Strom, Heikki Laitinen, Michel Tossaing and Sven Martin(2007), "Development of the EGNOS Pseudolite System", Journal of Global Positioning Systems, Volume 6, No. 2, pp.119-125 https://doi.org/10.5081/jgps.6.2.119
  9. Schaer, S., W. Gurtner and J. Feltens(1998), "IONEX: The IONosphere Map EXchange Format Version 1," Proceedings of the 1998 IGS Analysis Center Workshop, February25, pp.233-247.
  10. Spofford Paul R., Remondi Benjamin W. (1999), The National Geodetic Survey Standard GPS Format SP3, ftp://igscb.jpl.nasa.gov/igscb/data/format/sp3_docu.txt
  11. Tsai Y.(1999), "Wide Area Differential Operation of the Global Positioning System: Ephemeris and Clock Algorithms", Ph.d. thesis, Stanford University
  12. Yun H., Han D. H., Kee C. D.(2013), "Performance Verification of Korean Wide Area Differential GNSS Ground Segment", Journal of Korean Navigation and Port Research, Vol. 37, No. 1, pp. 49-54. https://doi.org/10.5394/KINPR.2013.37.1.49