Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Performance Analysis of GNSS Ephemeris Fault Detection Algorithm Based on Carrier-Phase Measurement

반송파 측정값 기반 GNSS 궤도력 고장 검출 알고리즘 성능 분석

  • Ahn, Jongsun (Department of Aerospace Information System Engineering, Konkuk University) ;
  • Jun, Hyang-Sig (CNS/ATM and Satellite Navigation Research Center, Korea Aerospace Research Institute) ;
  • Nam, Gi-Wook (CNS/ATM and Satellite Navigation Research Center, Korea Aerospace Research Institute) ;
  • Yeom, Chan-Hong (CNS/ATM and Satellite Navigation Research Center, Korea Aerospace Research Institute) ;
  • Lee, Young Jae (Department of Aerospace Information System Engineering, Konkuk University) ;
  • Sung, Sangkyung (Department of Aerospace Information System Engineering, Konkuk University)
  • Received : 2013.07.08
  • Accepted : 2014.05.27
  • Published : 2014.06.01
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Abstract

We analyze fault detection algorithm of ephemeris included in navigation message, which is one of the GNSS risk factors. This algorithm uses carrier-phase measurement and baseline vector of two reference stations and is alternative method for uncertainty condition of previous ephemeris. Even though same ephemeris fault is occurred, the geometry condition, between baseline vector of reference stations and satellites, effects on performance of algorithm. Also, we introduce the suitable geometry of reference stations, threshold and performance index (MDE : Minimum Detectable Error) in jeju international airport.

본 논문에서는 위성항법시스템의 무결성 저해 요인 중, 항법메시지에 담겨 전송되는 궤도력 (Ephemeris) 정보의 고장 여부를 판단할 수 있는 알고리즘을 분석 및 성능 평가를 수행하였다. 알고리즘은 반송파 측정값과 두 지상 기준국간의 기저벡터 정보가 활용된다. 주요 특징으로 기준국 기저선과 위성이 이루는 기하학적 조건 기저선 길이에 따라 동일 궤도력 고장에 대해 알고리즘의 성능의 편차가 발생할 수 있음을 확인하였다. 또한 알고리즘 적용이 적합한 GBAS의 지상 기준국 안테나 배치 방안 및 제주국제공항에 운용되었을 때의 한계치 및 성능 지표 (MDE : Minimum Detectable Error)를 계산하였다.

Keywords

References

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