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Korean Meteorological Society (한국기상학회)
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Retrieval and Quality Assessment of Atmospheric Winds from the Aircraft-Based Observation Near Incheon International Airport, Korea

인천 공항 주변 고해상도 항공기 추적 정보 기반의 바람 관측자료 생산 및 품질 검증

  • Kim, Jeongmin (School of Earth and Environmental Sciences, Seoul National University) ;
  • Kim, Jung-Hoon (School of Earth and Environmental Sciences, Seoul National University)
  • 김정민 (서울대학교 지구환경과학부) ;
  • 김정훈 (서울대학교 지구환경과학부)
  • Received : 2022.09.08
  • Accepted : 2022.12.12
  • Published : 2022.12.31
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Abstract

We analyzed the high-resolution wind data of Aircraft-Based Observation from the Mode-Selective Enhanced Surveillance (Mode-S EHS) data in Korea. For assessment of its quality, the Mode-S wind data was compared with the ECMWF ReAnalysis 5 (ERA5) reanalysis and Aircraft Meteorological Data Relay (AMDAR) data for more than 3-months from 7 May 2021 to 24 August 2021 near Incheon International Airport, Korea. Considering that the AMDAR reports are not provided by all commercial aircraft, total number of the Mode-S derived wind data with a second sampling rate was about twice larger than that of available AMDAR wind data. After the quality control procedures by removing erroneous samples, it was found that the root mean square errors (RMSEs) of the Mode-S retrieved winds are similar to that from the AMDAR winds. In particular, between 550 and 650 hPa levels, RMSE of the Mode-S (AMDAR) zonal wind against ERA5 data was about 2.3 m s-1 (1.9 m s-1), and those increased to 3.3 m s-1 (2.4 m s-1) in 200~500 hPa levels. A similar trend was found in the meridional wind, but a distinct positive mean bias of 2.16 m s-1 was observed between 875 and 1,000 hPa levels. Winds retrieved from the Mode-S also showed a good agreement directly with AMDAR data. As the Mode-S provides a large amount of data with a reliable quality, it can be useful for both data assimilation in the numerical weather prediction model and situational awareness of wind and turbulence for aviation safety in Korea.

Keywords

Acknowledgement

이 연구는 기상청 「차세대 항공교통 지원 항공기상기술개발(NARAE-Weather)」(KMI2022-00310)의 지원과 기상지진 See-At기술개발연구사업(KMI2020-01910)의 지원으로 수행되었습니다. ADS-B 자료 수신 및 저장과 관련해서 항공기상청 정보기술과의 정강아 팀장님과 차세대항공기상팀 안광득 과장님, 김진원 팀장님 및 ADS-B 자료 수집과 관련된 항공기상청 관계자분들께 감사드립니다.

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