대기 (Atmosphere)

  • 제24권3호
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  • Pages.391-402
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  • 2014
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  • 1598-3560(pISSN)
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  • 2288-3266(eISSN)
한국기상학회 (Korean Meteorological Society)
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GPS 가강수량 산출을 위한 최소 관측세션 지속시간에 대한 분석

An Analysis of the Least Observing-Session Duration of GPS for the Retrieval of Precipitable Water Vapor

  • 김유준 (국립기상연구소 예보연구과 재해기상연구센터) ;
  • 한상옥 (국립기상연구소 예보연구과 재해기상연구센터) ;
  • 김기훈 (국립기상연구소 예보연구과 재해기상연구센터) ;
  • 김선정 (국립기상연구소 예보연구과 재해기상연구센터) ;
  • 김건태 (국립기상연구소 예보연구과 재해기상연구센터) ;
  • 김병곤 (강릉원주대학교 대기환경과학과)
  • Kim, Yoo-Jun (High Impact Weather Research Center, Forecast Research Division, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Han, Sang-Ok (High Impact Weather Research Center, Forecast Research Division, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Kim, Ki-Hoon (High Impact Weather Research Center, Forecast Research Division, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Kim, Seon-Jeong (High Impact Weather Research Center, Forecast Research Division, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Kim, Geon-Tae (High Impact Weather Research Center, Forecast Research Division, National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Kim, Byung-Gon (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University)
  • 투고 : 2014.05.15
  • 심사 : 2014.08.22
  • 발행 : 2014.09.30
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초록

This study investigated the performances of precipitable water vapor (PWV) retrieval from the sets of ground global positioning system (GPS) signals, each of which had different length of observing-session duration, for the purpose of obtaining as short session duration as possible that is required at the least for appropriate retrieval of the PWV for meteorological usage. The shorter duration is highly desirable to make the most use of the GPS instrument on board the mobile observation vehicle making measurements place by place. First, using Bernese 5.0 software the PWV retrieval was conducted with the data sets of GPS signals archived continuously in 30 seconds interval during 2-month period of January and February, 2012 at Bukgangneung site. Each of the PWVs produced independently using different session durations was compared to that of radio-sonde launched at the same GPS location, a Bukgangneung site. Second, the same procedure was done using the data sets obtained from the mobile observation vehicle that was operating at Boseong area in Jeonnam province during Changma observation campaign in 2013, and the results were compared to that at Bukgangneung site. The results showed that as the observing-session duration increased the retrieval errors decreased with the dramatic change happening between 3 and 4 hours of the duration. On average, the root mean square error (RMSE) of the retrieved PWV was around 1 mm for the durations of greater than 4 hours. The results at both the Bukgangneung (fixed site) and Boseong (mobile vehicle) seemed to be fairly comparable with each other. From this study it is believed that at least 4 hours of observing-session duration is needed for the retrieval of PWV from the ground GPS for meteorological usage using Bernese 5.0 software.

키워드

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