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Automatic detection and correction algorithms for magnetic saturation in the SMFT/HSOS longitudinal magnetograms
Xu, Hai-Qing1; Liu, Suo1; Su, Jiang-Tao1,2; Deng, Yuan-Yong1,2; Plotnikov, Andrei3; Bai, Xian-Yong1,2; Chen, Jie1; Yang, Xiao1; Guo, Jing-Jing1; Wang, Xiao-Fan1; Song, Yong-Liang1
2021-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume21Issue:3Pages:9
AbstractA longitudinal magnetic field often suffers the saturation effect in a strong magnetic field region when the measurement is performed at a single-wavelength point and linear calibration is adopted. In this study, we develop a method that can judge the threshold of saturation in Stokes V/I observed by the Solar Magnetic Field Telescope (SMFT) and correct it automatically. The procedure is to first perform the second-order polynomial fit to the Stokes V/I vs. I/I-m (I-m is the maximum value of Stokes I) curve to estimate the threshold of saturation, then reconstruct Stokes V/I in a strong field region to correct for saturation. The algorithm is demonstrated to be effective by comparing with the magnetograms obtained by the Helioseismic and Magnetic Imager (HMI). The accuracy rate of detection and correction for saturation is similar to 99.4% and similar to 88% respectively among 175 active regions. The advantages and disadvantages of the algorithm are discussed.
KeywordSun sunspots Sun magnetic field Methods data analysis
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences
DOI10.1088/1674-4527/21/3/067
WOS KeywordVECTOR MAGNETOGRAM ; FMG ONBOARD ; FIELD ; CALIBRATION ; INTENSITY
Language英语
Funding ProjectNational Natural Science Foundation of China[11703042] ; National Natural Science Foundation of China[11911530089] ; National Natural Science Foundation of China[U1731241] ; National Natural Science Foundation of China[11773038] ; National Natural Science Foundation of China[11427901] ; National Natural Science Foundation of China[11427803] ; National Natural Science Foundation of China[11673033] ; National Natural Science Foundation of China[U1831107] ; National Natural Science Foundation of China[11873062] ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences[XDA15320302] ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences[XDA15052200] ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences[XDA15320102] ; 13th Five-year Informatization Plan of Chinese Academy of Sciences[XXH13505-04]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences ; 13th Five-year Informatization Plan of Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000657379000001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77012
Collection中国科学院国家天文台
Corresponding AuthorXu, Hai-Qing; Su, Jiang-Tao
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
3.Russian Acad Sci, Crimean Astrophys Observ, Nauchny 298409, Crimea, Russia
Recommended Citation
GB/T 7714
Xu, Hai-Qing,Liu, Suo,Su, Jiang-Tao,et al. Automatic detection and correction algorithms for magnetic saturation in the SMFT/HSOS longitudinal magnetograms[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(3):9.
APA Xu, Hai-Qing.,Liu, Suo.,Su, Jiang-Tao.,Deng, Yuan-Yong.,Plotnikov, Andrei.,...&Song, Yong-Liang.(2021).Automatic detection and correction algorithms for magnetic saturation in the SMFT/HSOS longitudinal magnetograms.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(3),9.
MLA Xu, Hai-Qing,et al."Automatic detection and correction algorithms for magnetic saturation in the SMFT/HSOS longitudinal magnetograms".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.3(2021):9.
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