Journal of Advanced Marine Engineering and Technology

  • 제38권4호
  • /
  • Pages.437-443
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  • 2014
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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국내 DGPS 내륙 기준국 전파 측정 및 서비스 분석

Service analysis and propagation measurement for DGPS land-based reference station in Korea

  • 투고 : 2014.01.20
  • 심사 : 2014.04.18
  • 발행 : 2014.05.31
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초록

본 논문에서는 국내 DGPS 내륙 기준국의 전파 환경을 측정하고 기준국별 서비스 영역과 DGPS 수신 신호의 품질을 분석하였다. DGPS 기준국별로 동절기와 하절기에 전파되는 DGPS 신호의 수신 전계레벨과 신호대 잡음비를 측정하여 서비스 영역이 낮은 기준국의 영향과 영역을 향상하기 위한 방안을 모색하였다. 산악지형과 대지 도전율이 낮은 기준국을 제외한 기준국의 서비스 영역은 약 80 % 이상의 설계 기준 서비스 영역을 제공하고 있으며, 평탄한 지형과 대지 도전율이 양호한 대지의 기준국 설치운영과 송신 안테나의 효율 향상을 통하여 서비스 영역의 향상을 기대할 수 있다.

Based on the radio wave propagation measurement of DGPS land-based reference stations, the DGPS service coverage and signal quality in the receiving points are analyzed in this paper. The DGPS signal strength and SNR in the receiving point are measured in the winter and summer season, respectively. In case of DGPS reference station that can not provide the designed service coverage, the solution to improve the service coverage is presented in this paper. Almost all DGPS reference station except reference station with low ground conductivity or mountainous terrain provide the DGPS service coverages of 80% or more of the designed service area. The service coverages of DGPS reference stations can be improved to pre-designed service area in case of installation management of DGPS site on the plain terrain and good ground conductivity. It is necessary to get the high efficiency of transmitting antenna to improve the service area.

키워드

참고문헌

  1. Ministry of Oceans and Fisheries, DGNSS Central Office: http://www.ndgps.go.kr, Accessed November 2013.
  2. K. A. Norton, "The propagation of radiowaves over the surface of the earth and in the upper atmosphere", Proceedings of the Institute of Radio Engineers, vol. 25, no. 9, pp. 1203-1236, 1937.
  3. U. S. Coast Guard, http://www.navcen.uscg.gov, Accessed October 2013.
  4. IALA, On the Performance and Monitoring of DGNSS Services in the Frequency Band 283.5 - 325 kHz, IALA Recommendation R-121, International Association of Marine Aids to Navigation and Lighthouse Authorities, France, 2004.
  5. R. Li, "The accuracy of norton's empirical approximations for groundwave attenuation", IEEE Trans. on Antenna and Propagation, vol. 31, no. 4, pp. 624-628. 1983. https://doi.org/10.1109/TAP.1983.1143096
  6. Y. W. KIM and H. J. Baek, "Service coverage analysis on land-based DGPS station due to output power enhancement," Journal of Korea Institute of Information and Communication Engineering, vol. 16, no. 7, pp. 1350-1357, 2012 (in Korean). https://doi.org/10.6109/jkiice.2012.16.7.1350