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심경진,문흥규,Sim, Gyeong-Jin,Mun, Heung-Gyu 한국천문학회 1996 天文學論叢 Vol.11 No.1
We analyze 280 data of the daily sunspot observations during the period of January 1 to December 31 in 1995 and present the daily relative sunspot numbers. During the 1995, the preliminary annual average of the relative sunspot numbers is found to be 20.1 based on 7.9 distinct spots in a single group for 1.3 spot groups. According to the appearance of 366 spot groups, our analysis shows that the mean life time of spot group is about 5 day and 10.1 hours.
심경진,Sim, Kyung-Jin 한국천문학회 1997 天文學論叢 Vol.12 No.1
We have analyzed 223 data of the daily sunspot observations during the period of January 1 to December 31 in 1996 and present the daily relative sunspot numbers. During the 1996, the preliminary annual average of the relative sunspot numbers found to be 8.8 based on 3.7 distinct spots in a single group for 0.6 spot groups According to the appearance of 123 spot groups, our analysis shows that the mean life time of spot group is about 5 day and 5.8 hours. The proper conversion factor of the Korea Astronomy Observatory(KAO) derived from a comparison of one thousand one hundred and eighty observational sunspot numbers from 1992 to 1996 with those of international sunspot numbers is determined to be 1.17 instead of 0.97 which is in use.
심경진,박영득,Sim, Gyeong-Jin,Park, Yeong-Deuk 한국천문학회 1992 天文學論叢 Vol.7 No.1
1992년 1년 동안 월 평균 14.3일간 흑점을 관측하여 총 172일간 관측하였으며 매일 평균 6.1개의 흑점군과 45.8개의 흑점이 관측되어 년 평균 흑점 상대수 97.9를 얻었다. 이 기간동안 297개의 흑점군이 출현하여 1041개의 흑점군이 관측되었으며 태양 북반구보다 남반구에 약 55%이상의 흑점이 더 많이 나타나 1990년, 1991년에 이어 점점 더 남반구의 태양 활동이 북반구보다 더욱더 활성적이었음을 보여준다.
심경진,SIM KYUNG JIN 한국천문학회 1999 天文學論叢 Vol.14 No.2
We have analyzed 251 data of the daily sunspot observations during the period of January 3 to December 31 in 1998 and present the daily relative sunspot numbers. During the 1998, the prehmmary annual average of the relative sunspot numbers is found to be 84.8 based on 26.6 distinct spots in a single group for 4.6 spot groups. According to the appearance of 286 spot groups, our analysis shows that the mean life time of spot group is about 4 day and 23.6 hours.
심경진,SIM KYUNG JIN 한국천문학회 1998 天文學論叢 Vol.13 No.1
We have analyzed 255 data of the daily sunspot observations during the period of January 3 to December 31 in 1997 and present the daily relative sunspot numbers. During the 1997, the preliminary annual average of the relative sunspot numbers found to be 28.2 based on 9.7 distinct spots in a single group for 1.4 spot groups. According to the appearance of 366 spot groups, our analysis shows that the mean life time of spot group is about 4 day and 17.0 hours.
심경진,Sim, Gyeong-Jin 한국천문학회 1993 天文學論叢 Vol.8 No.1
We analyze 211 data of the daily sunspot observations during the period of January 4 to November 30 in 1993 and present the daily relative sunspot numbers. During 334 days of the period, the preliminary annual average of the relative sunspot numbers is found to be 61.8 based on 27.1 distinct spots in a single group for 3.7 spot groups. According to the appearance of 203 spot groups, our analysis shows that the mean life time of spot group is about 1 day and 15.5 hours. Our records show that more number of sunspots have appeared in the southern hemisphere than in the northern hemisphere by some 2%, indicating that the solar activities of the northern and southern hemisphere are much the same during the period.
심경진,김강민,박영득,윤홍식,Sim, Gyeong-Jin,Kim, Gang-Min,Park, Yeong-Deuk,Yun, Hong-Sik 한국천문학회 1990 天文學論叢 Vol.5 No.1
20cm 태양망원경이 소백산 천문대에서 대덕 천문우주과학연구소로 이전 설치된 후, 1987년 6월 19일 부터 1990년 11월 30일까지 흑점관측을 수행하여 343개의 흑점관측자료를 얻었다. 본 관측기간중 일일 평균 흑점상대수는 83.4로, 매일 평균 5개의 흑점군과 30개의 흑점이 관측되었다. 관측된 월평균 흑점상대수를 분석한 결과에 의하면 1986년 9월에 시작한 제22 태양활동 주기의 극대기는 1989년 9월경으로 밝혀졌다. 국제 흑점 상대수와 비교 가능한 292개의 관측 자료를 사용하여 대덕 태양망원경의 규격화 상수 K를 결정하였으며, 그 간은 소백산 천문대의 규격화 산수 0.87보다 큰 1.08로 밝혀진다.