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WISE 펄스 도플러 윈드라이다 품질관리 알고리즘 개발

Development of a Quality Check Algorithm for the WISE Pulsed Doppler Wind Lidar

  • 박문수 (한국외국어대학교 차세대도시농림융합기상사업단) ;
  • 최민혁 (한국외국어대학교 차세대도시농림융합기상사업단)
  • Park, Moon-Soo (Weather Information Service Engine, Hankuk University of Foreign Studies) ;
  • Choi, Min-Hyeok (Weather Information Service Engine, Hankuk University of Foreign Studies)
  • 투고 : 2016.07.18
  • 심사 : 2016.08.27
  • 발행 : 2016.09.30

초록

A quality check algorithm for the Weather Information Service Engine pulsed Doppler wind lidar is developed from a view point of spatial and temporal consistencies of observed wind speed. Threshold values for quality check are determined by statistical analysis on the standard deviation of 3-component of wind speed obtained by a wind lidar, and the vertical gradient of horizontal wind speed obtained by a radiosonde system. The algorithm includes carrier-to-noise ratio (CNR) check, data availability check, and vertical gradient of horizontal wind speed check. That is, data sets whose CNR is less than -29 dB, data availability is less than 90%, or vertical gradient of horizontal wind speed is less than $-0.028s^{-1}$ or larger than $0.032s^{-1}$ are classified as 'doubtful', and flagged. The developed quality check algorithm is applied to data obtained at Bucheon station for the period from 1 to 30 September 2015. It is found that the number of 'doubtful' data shows maxima around 2000 m high, but the ratio of 'doubtful' to height-total data increases with increasing height due to atmospheric boundary height, cloud, or rainfall, etc. It is also found that the quality check by data availability is more effective than those by carrier to noise ratio or vertical gradient of horizontal wind speed to remove an erroneous noise data.

키워드

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피인용 문헌

  1. High-resolution urban observation network for user-specific meteorological information service in the Seoul Metropolitan Area, South Korea vol.10, pp.4, 2017, https://doi.org/10.5194/amt-10-1575-2017
  2. Features of sea–land-breeze circulation over the Seoul Metropolitan Area vol.5, pp.1, 2018, https://doi.org/10.1186/s40562-018-0127-6