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NTIS 바로가기대기 = Atmosphere, v.27 no.4, 2017년, pp.467 - 481
이정은 (기상청 기상레이더센터 레이더분석과) , 정성화 (기상청 기상레이더센터 레이더분석과) , 김해림 (기상청 기상레이더센터 레이더분석과) , 이선기 (기상청 기상레이더센터 레이더분석과)
A correction method of reflectivity in partial beam blockage (PBB) area is suggested, which is based on the combination of digital terrain information and self-consistency principle between polarimetric observation. First, the reflectivity was corrected by adding the radar energy loss estimated from...
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
빔 차폐는 레이더의 무엇을 유발하는가? | 레이더 빔의 부분 혹은 전부가 지형이나 구조물(예, 빌딩, 철탑)에 의해 가리는 빔 차폐(beam blockage)는 레이더 관측영역을 제한하며 레이더 수신전력 값에 기초한 관측변수(예, 반사도(ZH ), 차등반사도(ZDR))와 지상강우추정에 큰 오차를 유발한다(Joss et al., 1990;Joss and Lee, 1995; West rick et al. | |
국내 기상레이더 운영기관들은 어디인가? | , 2002, Giangrande and Ryzhkov,2005). 대부분의 국내 기상레이더 운영기관들(예, 기상청, 국토교통부, 한국항공우주연구원)은 빔 차폐의 영향을 최소화하고자 산 정상에 타워와 함께 레이더를 설치하였다. 그러나 복잡한 산악지형으로 인해 레이더강수추정(quantitative precipitation estimation, QPE)에서가장 중요한 저고도 각에서는 빔 차폐가 발생한다(Parket al. | |
개선된 차폐 보정 방법이 효과적으로 강우를 보정한 것으로 판단하는 근거는? | 0 mm를 초과하는 경우에만 산출하였다. 총 누적강우량과 1시간 강우량 결과 모두에서 크게 과소 추정되었던 누적강우량이 YDYP를 이용한 보정후 지상우량계 결과와 가까워졌다. 따라서 개선된 차폐 보정 방법이 효과적으로 강우를 보정한 것으로 판단된다. |
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