Chinese sunspot drawings and their digitization - (II) accuracy analysis for digitized sunspot hand-drawing records of Yunnan Observatories | |
Peng, Yang2; Luo, Xiao-Yu2; Zeng, Shu-Guang2; Deng LH(邓林华)3,4; Zheng, Sheng2; Lin, Gang-Hua1; Cheng, Yu-Lin2; Tao JP(淘金萍)3; Feng YL(冯永利)3 | |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
2020-04-01 | |
卷号 | 20期号:4页码:7 |
关键词 | sunspots methods data analysis techniques image processing |
ISSN号 | 1674-4527 |
DOI | 10.1088/1674-4527/20/4/61 |
产权排序 | 第2完成单位 |
文献子类 | Article |
英文摘要 | 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. |
学科主题 | 天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科 |
URL标识 | 查看原文 |
出版地 | 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA |
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 |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
CSCD记录号 | CSCD:6721363 |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
WOS记录号 | WOS:000529933300001 |
资助机构 | 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 |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/23161] |
专题 | 云南天文台_抚仙湖太阳观测站 |
通讯作者 | Zeng, Shu-Guang |
作者单位 | 1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China 2.College of Science, China Three Gorges University, Yichang 443002, China 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, 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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