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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(淘金萍)2; Feng YL(冯永利)2
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2020-04-01
Volume20Issue:4Pages:7
DOI10.1088/1674-4527/20/4/61
Contribution Rank第2完成单位
Indexed BySCI ; CSCD
Keywordsunspots methods data analysis techniques image processing
Abstract

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.

Funding ProjectNational 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
Funding OrganizationNational 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
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000529933300001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
CSCD IDCSCD:6721363
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23162
Collection抚仙湖太阳观测和研究基地
Corresponding AuthorZeng, Shu-Guang
Affiliation1.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
Recommended Citation
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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