Journal of Positioning, Navigation, and Timing

  • 제13권3호
  • /
  • Pages.221-235
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  • 2024
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  • 2288-8187(pISSN)
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  • 2289-0866(eISSN)
항법시스템학회 (The Institute of Positioning, Navigation, and Timing)
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국내 GNSS 오차 성분별 공간 상관성 및 선형 모델링 특성 분석

Analysis of Spatial Correlation and Linear Modeling of GNSS Error Components in South Korea

  • 김성익 ;
  • 이예빈 ;
  • 조용래 ;
  • 차윤호 ;
  • 박병운 ;
  • 박슬기 ;
  • 박상현
  • Sungik Kim (Department of Aerospace Engineering and Department of Convergence Engineering for Intelligent Drone, Sejong University) ;
  • Yebin Lee (Department of Aerospace Engineering and Department of Convergence Engineering for Intelligent Drone, Sejong University) ;
  • Yongrae Jo (Department of Aerospace Engineering and Department of Convergence Engineering for Intelligent Drone, Sejong University) ;
  • Yunho Cha (Department of Aerospace Engineering and Department of Convergence Engineering for Intelligent Drone, Sejong University) ;
  • Byungwoon Park (Department of Aerospace Engineering and Department of Convergence Engineering for Intelligent Drone, Sejong University) ;
  • Sul Gee Park (Maritime PNT Research Office) ;
  • Sang Hyun Park (Maritime PNT Research Office)
  • 투고 : 2024.05.16
  • 심사 : 2024.06.17
  • 발행 : 2024.09.15
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초록

Errors included in Global Navigation Satellite System (GNSS) measurements degrade the performance of user position estimation but can be mitigated by spatial correlation properties. Augmentation systems providing correction data can be broadly categorized into State Space Representation (SSR) and Observation Space Representation (OSR) methods. The satellite-based cm-level augmentation service based on the SSR broadcasts correction data via satellite signals, unlike the traditional Real-Time Kinematic (RTK) and Network RTK methods, which use OSR. To provide a large amount of correction data via the limited bandwidth of the satellite communication, efficient message structure design considering service area, correction generation, and broadcast intervals is necessary. For systematic message design, it is necessary to analyze the influence of error components included in GNSS measurements. In this study, errors in satellite orbits, satellite clocks for GPS, Galileo, BeiDou, and QZSS satellite constellations ionospheric and tropospheric delays over one year were analyzed, and their spatial decorrelations and linear modeling characteristics were examined.

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과제정보

This research was supported by a grant from National R&D Project "Development of ground-based centimeter-level maritime precise PNT technologies" funded by the Ministry of Oceans and Fisheries (RS-2020-KS201371).

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