대기 (Atmosphere)

  • 제21권3호
  • /
  • Pages.285-300
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  • 2011
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  • 1598-3560(pISSN)
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  • 2288-3266(eISSN)
한국기상학회 (Korean Meteorological Society)
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위성 적외영상 자료를 이용한 현업용 기상레이더 반사도 합성자료의 채프에코 제거

Elimination of Chaff Echoes in Reflectivity Composite from an Operational Weather Radar Network using Infrared Satellite Data

  • Han, Hye-Young (Weather Radar Center, Korea Meteorological Administration) ;
  • Heo, Bok-Haeng (Weather Radar Center, Korea Meteorological Administration) ;
  • Jung, Sung-Hwa (Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
  • Lee, GyuWon (Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
  • You, Cheol-Hwan (Weather Radar Center, Korea Meteorological Administration) ;
  • Lee, Jong-Ho (Weather Radar Center, Korea Meteorological Administration)
  • 투고 : 2011.05.05
  • 심사 : 2011.08.12
  • 발행 : 2011.09.30
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초록

To discriminate and eliminate chaff echoes in radar measurements, a new removal algorithm in two-dimensional reflectivity composite at the height of 1.5 km has been developed by using the brightness temperature($T_B$) obtained from MTSAT-1R. This algorithm utilizes the fact that chaffs are not appeared in infrared satellite data of MTSAT-1R, but detected in radar measurements due to their significant backscattering in the given radar wavelength. The algorithm is evaluated for three different situations: chaff only, chaff mixed with convective storms, and chaff covered with clouds. The algorithm shows excellent performance for the cases of chaff only and chaff mixed with convective storms. However, the performance of the algorithm significantly depends on the presence of clouds. Thus, the statistical analysis of $T_B$ is performed in order to optimize the monthly threshold.

키워드

참고문헌

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