Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Analysis of Propagation Environment for Selecting R-Mode Reference and Integrity Station

R-Mode 보정국과 감시국 선정을 위한 전파환경 분석에 관한 연구

  • Jeon, Joong-Sung (Engineering Division 2, ANSE Technologies Co., Ltd) ;
  • Jeong, Hae-Sang (Graduate School of Korea Maritime & Ocean University) ;
  • Gug, Seung-Gi (Department of Coast Guard Studies, Korea Maritime & Ocean University)
  • Received : 2021.01.14
  • Accepted : 2021.02.09
  • Published : 2021.02.28
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Abstract

In ocean field, the spread of the Fourth Industrial Revolution based on information and communication technology requires high precision and stable PNT&D (Position, Navigation, Timing and Data). As the IMO (International Maritime Organization) and IALA (The International Association of Marine Aids to Navigation and Lighthouse Authorities) are requiring backup systems due to mitigate vulnerabilities and the increase of dependency on GNSS (Global Navigation Satellite System), Korea is conducting a research & development of R-Mode. An DGPS (Differentiate Global Positioning System) reference station that uses MF, an existing maritime infrastructure, and AIS (Automatic Identification System) base stations that use 34 integrity station and VHF will be utilized in this study to avoid redundant investment. Because there are radio shadow areas that display low signal levels in the west sea, the establishment of new R-Mode reference and integrity station will be intended to resolve problems regrading the radio shadow area. Because the frequency has a characteristic in that radio wave transmits well along the ground (water surface) in low frequency band, simulation and measurement were conducted therefore this paper to propose candidate sites for R-Mode reference and integrity station resulted through p wave's propagation characteristics analysis. Using this paper, R-Mode reference and integrity station can be established at appropriate locations to resolve radio shadow areas in other regions.

해양에서 정보통신기술 기반의 4차 산업혁명 확산은 고정밀 및 안정적인 위치·항법·시각·정보(PNT&D)를 요구하고 있다. 국제해사기구(IMO)와 국제항로표지협회(IALA)에서는 범지구 위성 항법 시스템(GNSS) 의존도가 증가함에 따라 취약성 경감을 위해 백업시스템을 요구하고 있어 우리나라는 R-Mode 기술개발에 관한 연구를 진행하고 있다. 시설의 중복투자를 막기 위해 기존 해상 인프라인 중파를 이용하는 DGPS(Differential Global Positioning System) 보정국과 감시국 34개소 및 초단파를 이용하는 선박자동식별장치(AIS) 기지국을 활용하고자 하며, 일부 서해 지역에서 수신신호의 세기가 미약한 전파 음영지역이 있으므로, 이를 해결하기 위해 R-Mode 보정국과 감시국 신설을 통하여 전파 음영지역을 해소하고자 한다. 따라서 본 논문에서는 주파수가 낮은 대역에서(단파대 이하) 전파가 지표면(수면)을 따라 잘 전송되는 특징이 있어 시뮬레이션과 전파측정을 하였으며, 전파전파 특성 분석을 통하여 R-Mode 보정국과 감시국 신설 후보지를 제안하고자 한다. 본 논문을 활용하여 다른 지역의 전파 음영지역을 해소하기 위해 적절한 위치에 R-Mode 보정국과 감시국 후보지를 선정할 수 있다.

Keywords

References

  1. Accseas(2014a), Feasibility Study of R-Mode using MF DGPS Transmissions.
  2. Accseas(2014b), Feasibility Study of R-Mode using AIS Transmissions.
  3. Accseas(2014c), Feasibility Study of R-Mode combining MF DGNSS, AIS, and eLoran Transmissions.
  4. Electronics and Telecommunications Research Institute(1997), "Radio wave characteristic measurement and analysis technology research", pp. 54-60. -> Abstract
  5. Ham, Y. K. and Lee, H. J.(1997), "Radio Wave characteristics", Journal of The Korean Institute of Communications and Information Sciences, Vol. 14, No. 8, pp. 91-102.
  6. IMO(2001), Revised Maritime Policy and Requirements for a Future Global Navigation Satellite System (GNSS), Resolution A.915 (22), 22nd Session of IMO Assembly. -> Abstract
  7. Innovate UK(2017), Economic impact to the UK of a disruption to GNSS.
  8. ITU-R P.368-9(2007), "Ground-wave propagation curves for frequencies between 10 KHz and 30 MHz", p. 26.
  9. ITU-R M.823-3(2006), Technical characteristics of differential transmissions for global navigation satellite systems from maritime radio beacons in the frequency band 283.5-315 kHz in Region 1 and 285-325 kHz in Regions 2 and 3.
  10. J. D. Parsons(1992), The Mobile Radio Propagation Channel, Pentech Press, pp. 62-64.
  11. Korean Space Weather Center(2020), Forecast Condition, https://spaceweather.rra.go.kr/.
  12. National Maritime PNT Office(2020), Introduction of GPS and DGPS, https://www.nmpnt.go.kr/
  13. IALA(2005), IALA Recommendation R-115 "Provision of maritime radionavigation services in the frequency band 283.5-315 kHz in Region 1 and 285-325 kHz in Region 2 and 3".
  14. IALA(2008), IALA Recommendation R-135 On The Future of DGNSS Edition 2.
  15. National Maritime PNT Office(2020), Reference and Integrity Station of AIS, DGPS & Loran, https://www.nmpnt.go.kr/.
  16. Ministry of Government Legislation(2020), Radio Waves Act.
  17. MOF(2019), 2020 Marine Aids to Navigation Enforcement Plan.
  18. RTI(2019), Economic Benefits of the Global Positioning System (GPS).