Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Estimation of Global Horizontal Insolation over the Korean Peninsula Based on COMS MI Satellite Images

천리안 기상영상기 영상을 이용한 한반도 지역의 수평면 전일사량 추정

  • Lee, Jeongho (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Choi, Wonseok (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Kim, Yongil (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Yun, Changyeol (New & Renewable Energy Research Department, Korea Institute of Energy Research) ;
  • Jo, Dokki (New & Renewable Energy Research Department, Korea Institute of Energy Research) ;
  • Kang, Yongheack (New & Renewable Energy Research Department, Korea Institute of Energy Research)
  • 이정호 (서울대학교 공과대학 건설환경공학부) ;
  • 최원석 (서울대학교 공과대학 건설환경공학부) ;
  • 김용일 (서울대학교 공과대학 건설환경공학부) ;
  • 윤창열 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 조덕기 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 강용혁 (한국에너지기술연구원 신재생에너지연구본부)
  • Received : 2013.01.11
  • Accepted : 2013.02.17
  • Published : 2013.02.28
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Abstract

Recently, although many efforts have been made to estimate insolation over Korean Peninsula based on satellite imagery, most of them have utilized overseas satellite imagery. This paper aims to estimate insolation over the Korean Peninsula based on the Korean stationary orbit satellite imagery. It utilizes level 1 data and level 2 cloud image of COMS MI, the first meteorological satellite of Korea, and OMI image of NASA as input data. And Kawamura physical model which has been known to be suitable for East Asian area is applied. Daily global horizontal insolation was estimated by using satellite images of every fifteen minutes for the period from May 2011 to April 2012, and the estimates were compared to the ground based measurements. The estimated and observed daily insolations are highly correlated as the $R^2$ value is 0.86. The error rates of monthly average insolation was under ${\pm}15%$ in most stations, and the annual average error rate of horizontal global insolation ranged from -5% to 5% except for Seoul. The experimental results show that the COMS MI based approach has good potential for estimating insolation over the Korean Peninsula.

근래 들어 위성영상 기반의 한반도 지역 일사량 추정 연구가 활발히 진행되고 있으나 대부분의 연구들은 외국 위성영상을 이용하고 있다. 이에 본 연구에서는 국내 정지궤도 위성영상을 활용하여 한반도 지역의 일사량을 추정하는 것을 목적으로 한다. 입력데이터로는 국내최초의 정지궤도 위성인 천리안 기상영상기의 레벨1 데이터 및 레벨2 구름 영상, 그리고 미국 NASA의 OMI 영상을 이용하고, 물리모델식은 동아시아지역 일사량 추정에 보다 적합하다고 알려진 Kawamura 모델식을 적용한다. 2011년 5월~2012년 4월에 이르는 기간의 15분 간격 데이터를 이용하여 일일 수평면 전일사량을 추정하였으며, 이를 대한민국의 18개지점의 관측소 실측치와 비교하였다. 일일 일사량 추정값과 관측값 간의 $R^2$값은 0.86로서 높은 상관성을 나타냈으며, 월평균 일사량의 오차는 대부분의 지점에서 ${\pm}15%$ 이내였고 연평균 수평면 전일사량의 오차는 서울을 제외하면 약 -5~+5%의 분포를 보였다. 본 연구결과를 통해 한반도 지역의 일사량을 추정하는데 있어 천리안 기상영상기 영상이 활용 될 수 있음을 확인하였다.

Keywords

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