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Chinese sunspot drawings and their digitization - (II) accuracy analysis for digitized sunspot hand-drawing records of Yunnan Observatories
Peng, Yang1; Luo, Xiao-Yu1; Zeng, Shu-Guang1; Deng LH(邓林华)2,4; Zheng, Sheng1; Lin, Gang-Hua3; Cheng, Yu-Lin1; Tao JP(陶金萍)2; Feng YL(冯永利)2
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2020-04-01
卷号20期号:4页码:7
DOI10.1088/1674-4527/20/4/61
产权排序第2完成单位
收录类别SCI ; CSCD
关键词sunspots methods data analysis techniques image processing
摘要

Sunspots are the most striking and easily observed magnetic structures of the Sun, and statistical analysis of solar historical data could reveal a wealth of information on the long-term variation of solar activity cycle. The hand-drawn sunspot records of Yunnan Observatories, Chinese Academy of Sciences have been accumulating for more than 60 years, and nearly 16 000 images have been preserved. In the future, the observation mode of recording sunspots by hand-drawing will be replaced inevitably by digital images observed either at ground or in space. To connect the hand-drawn sunspot data and the purely digital sunspot data in future, it is necessary to analyze the systematic errors of the data which are observed by the two observation modes in the period of transition. In this paper, we choose 268 round sunspots (H-type in modified Zurich sunspot classification) from the drawing of Yunnan Observatories to compare their positions and areas with the CCD observations made by Helioseismic and Magnetic Imager (HMI) on board Solar Dynamic Observatory (SDO) and Global Oscillation Network Group (GONG). We find that the latitude and longitude accuracy of hand-drawn sunspot are within -0.127 and 2.29 degree respectively, and the area accuracy is about 16.36 sunspot unit (mu Hem). Systematic errors apparently decrease with large sunspot.

资助项目National Natural Science Foundation of China[U1731124] ; National Natural Science Foundation of China[U1531247] ; National Natural Science Foundation of China[11427901] ; National Natural Science Foundation of China[11873089] ; special foundation work of the Ministry of Science and Technology of China[2014FY120300] ; 13th Five-year Informatization Plan of Chinese Academy of Sciences[XXH13505-04] ; Youth Innovation Promotion Association CAS
项目资助者National Natural Science Foundation of China[U1731124, U1531247, 11427901, 11873089] ; special foundation work of the Ministry of Science and Technology of China[2014FY120300] ; 13th Five-year Informatization Plan of Chinese Academy of Sciences[XXH13505-04] ; Youth Innovation Promotion Association CAS
语种英语
学科领域天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科
学科门类理学 ; 理学::天文学
文章类型Article
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
出版地20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS记录号WOS:000529933300001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
CSCD记录号CSCD:6721363
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/23162
专题抚仙湖太阳观测和研究基地
通讯作者Zeng, Shu-Guang
作者单位1.College of Science, China Three Gorges University, Yichang 443002, China
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
4.Chongqing University of Arts and Sciences, Chongqing 402160, China
推荐引用方式
GB/T 7714
Peng, Yang,Luo, Xiao-Yu,Zeng, Shu-Guang,et al. Chinese sunspot drawings and their digitization - (II) accuracy analysis for digitized sunspot hand-drawing records of Yunnan Observatories[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(4):7.
APA Peng, Yang.,Luo, Xiao-Yu.,Zeng, Shu-Guang.,Deng LH.,Zheng, Sheng.,...&Feng YL.(2020).Chinese sunspot drawings and their digitization - (II) accuracy analysis for digitized sunspot hand-drawing records of Yunnan Observatories.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(4),7.
MLA Peng, Yang,et al."Chinese sunspot drawings and their digitization - (II) accuracy analysis for digitized sunspot hand-drawing records of Yunnan Observatories".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.4(2020):7.
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