Journal of the Korean Institute of Intelligent Systems (한국지능시스템학회논문지)

Korean Institute of Intelligent Systems (한국지능시스템학회)
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Minimization Method of Measurement Noise for Satellite Clock Anomaly Detection

위성시계 이상검출을 위한 측정잡음 최소화 기법

  • Seo, Kiyeol (GNSS Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Park, Sanghyun (GNSS Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Jang, Wonseok (GNSS Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Kim, Youngki (GNSS Research Center, Korea Institute of Ocean Science & Technology (KIOST))
  • 서기열 (한국해양과학기술원 GNSS연구센터) ;
  • 박상현 (한국해양과학기술원 GNSS연구센터) ;
  • 장원석 (한국해양과학기술원 GNSS연구센터) ;
  • 김영기 (한국해양과학기술원 GNSS연구센터)
  • Received : 2013.08.18
  • Accepted : 2013.12.16
  • Published : 2013.12.25
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Abstract

In order to detect and identify the GPS clock anomaly in the Differential GPS real environment, this paper addresses a method for minimizing the measurement noise of reference receivers. It estimates the real measurement noise that removed the uncommon error source from pseudorange measurement to minimize the measurement noise. Based on the output of two reference receivers, it first removes the uncommon errors, then optimizes the measurement noise by applying the correction data. Finally, it detects and identifies the satellite clock anomaly using the minimized measurement noise. The method will increase the availability of current DGPS reference system.

본 논문에서는 현재 운영 중인 DGPS 기준국 환경에서 위성시계 이상 발생시 실시간으로 이상현상을 검출하고 식별하기 위하여, 기준국 수신기의 측정잡음을 최소화하는 기법에 대해 다룬다. 기준국 수신기의 측정잡음을 최소화하기 위하여, 의사거리 측정치에 포함된 오차항목을 제거하여 순수 측정잡음 만을 추정한다. 먼저 두 대의 기준국 수신기의 출력을 이용하여 비공통 성분 오차를 제거한 다음, 해당 보정치를 적용하여 측정잡음을 최소화시킨다. 측정잡음 최소화를 기반으로 위성시계 이상발생시 이상신호를 검출하고 이상위성을 식별하여 DGPS 기준국 시스템의 가용성을 증대시키고자 한다.

Keywords

References

  1. DGNSS Central Office(http://www.ndgps.go.kr)
  2. Radio Technical Commission for Maritime Services (2006), "RTCM Standard 10401.2 for Differential NAVSTAR GPS Reference Stations and Integrity Monitors (RSIM)," RTCM Paper 221-2006-SC104 -STD.
  3. US Coast Guard (USCG) Navigation Center(http://www.navcen.uscg.gov/?Do=constellationstatus)
  4. K.Y. Seo, S.H. Park, H.C. Jeong, and S.H. Suh, "Analysis on the Limitation of Integrity Monitoring Functions for Maritime DGPS," Proceedings of International GNSS, 2009.
  5. K.Y. Seo and S.H. Park, "Detection and Identification Methods of Satellite Anomalies for Maritime DGPS RSIM," Proceedings of European Navigation Conference (ENC) , 2011.
  6. S.H. Park, K.Y. Seo, D.J. Cho, and S.H. Suh, "AParity Space Approach for Satellite Anomaly Monitoring of Maritime DGPS," Proceedings of the Institute of Navigation (ION) , 2011.
  7. Anne-Laure Vogel, Christophe Macabiau, and Norbert Suard, "Effect of a GPS Anomaly on Different GNSS Receivers," ION GNSS 18th International Technical Meeting of the Satellite Division, 13-16 September 2005, LongBeach, CA.
  8. Radio Technical Commission for Maritime Services (2001), "RTCM Recommended Standards for Differential GNSS Version 2.3," RTCM Paper 136-2001/SC104-STD.