We have performed the flat-fielding correction for the Hα full-disk monitoring system of KASI (Korea Astronomy and Space Science Institute), which is installed in the Solar Flare Telescope (SOFT) at the top of Bohyun Mountain. For this, we used a new method developed by Chae (2004), to determine the flat pattern from a set of relatively shifted images. Using this method, we successfully obtained the flat pattern for Hα full-disk observations and compared our result with the image observed in Catania Astrophysical Observatory. The method that we used in this study seems to be quite powerful to obtain the flat image for solar observations. In near future, we will apply this method for the flat-fielding correction of all solar imaging instruments in KASI.

ABSTRACT
1. 서론
2. 원리와 방법
    2.1 원리
    2.2 방법
3. 관측
    3.1 관측시스템
    3.2 바닥고르기를 위한 관측
4. 결과
    4.1. 바닥 영상 획득
    4.2. 바닥 영상 적용
5. 요약 및 토의
참고 문헌

• 박형민(충남대학교 천문우주과학과, 한국천문연구원) | H.-M. PARK (Dept. of Astronomy and Space Science, Chungnam National University, Korea Astronomy and Space Science Institute)
• 김연한(한국천문연구원) | Y.-H. KIM (Korea Astronomy and Space Science Institute)
• 봉수찬(한국천문연구원) | S.-C. BONG (Korea Astronomy and Space Science Institute)
• 박영득(한국천문연구원) | Y.-D. PARK (Korea Astronomy and Space Science Institute)
• 조경석(한국천문연구원) | K.-S. CHO (Korea Astronomy and Space Science Institute)
• 장비호(한국천문연구원) | B.-H. JANG (Korea Astronomy and Space Science Institute)
• 최성환(한국천문연구원) | S. CHOI (Korea Astronomy and Space Science Institute)
• 나자경(한국천문연구원) | J. NAH (Korea Astronomy and Space Science Institute)
• 이승민(한국천문연구원) | S.-M. LEE (Korea Astronomy and Space Science Institute)
• 채종철(서울대학교 천문학과) | J. CHAE (Dept. of Physics and Astronomy, Seoul National University)