YNAO OpenIR  > 抚仙湖太阳观测和研究基地
A nonlinear solar magnetic field calibration method for the filter-based magnetograph by the residual network
Guo, Jingjing1,4; Bai, Xianyong1,4; Liu H(刘辉)2; Yang, Xu3; Deng, Yuanyong1,4; Lin, Jiaben1; Su, Jiangtao1,4; Yang, Xiao1; Ji KF(季凯帆)2
Source PublicationAstronomy and Astrophysics
2021-02
Volume646
DOI.1051/0004-6361/202038617
Contribution Rank第2完成单位
Indexed BySCI ; EI
Keywordmagnetic field Sun: magnetic fields
Abstract

Context. The method of solar magnetic field calibration for the filter-based magnetograph is normally the linear calibration method under weak-field approximation that cannot generate the strong magnetic field region well due to the magnetic saturation effect. Aims. We try to provide a new method to carry out the nonlinear magnetic calibration with the help of neural networks to obtain more accurate magnetic fields. Methods. We employed the data from Hinode/SP to construct a training, validation and test dataset. The narrow-band Stokes I, Q, U, and V maps at one wavelength point were selected from all the 112 wavelength points observed by SP so as to simulate the single-wavelength observations of the filter-based magnetograph. We used the residual network to model the nonlinear relationship between the Stokes maps and the vector magnetic fields. Results. After an extensive performance analysis, it is found that the trained models could infer the longitudinal magnetic flux density, the transverse magnetic flux density, and the azimuth angle from the narrow-band Stokes maps with a precision comparable to the inversion results using 112 wavelength points. Moreover, the maps that were produced are much cleaner than the inversion results. The method can effectively overcome the magnetic saturation effect and infer the strong magnetic region much better than the linear calibration method. The residual errors of test samples to standard data are mostly about 50 G for both the longitudinal and transverse magnetic flux density. The values are about 100 G with our previous method of multilayer perceptron, indicating that the new method is more accurate in magnetic calibration.

Funding OrganizationN/A
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeJournal article (JA)
PublisherEDP Sciences
ISSN0004-6361
URL查看原文
EI Accession Number20210709909294
EI KeywordsMagnetometers
EI Classification Number701.2 Magnetism: Basic Concepts and Phenomena - 922.2 Mathematical Statistics - 942.3 Magnetic Instruments
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/24030
Collection抚仙湖太阳观测和研究基地
Corresponding AuthorGuo, Jingjing; Ji KF(季凯帆)
Affiliation1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China
3.Big Bear Solar Observatory, 40386 North Shore Lane, Big Bear City, CA, 92314-9672, United States
4.University of Chinese Academy of Sciences, Beijing, 100049, China
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Guo, Jingjing,Bai, Xianyong,Liu H,et al. A nonlinear solar magnetic field calibration method for the filter-based magnetograph by the residual network[J]. Astronomy and Astrophysics,2021,646.
APA Guo, Jingjing.,Bai, Xianyong.,Liu H.,Yang, Xu.,Deng, Yuanyong.,...&Ji KF.(2021).A nonlinear solar magnetic field calibration method for the filter-based magnetograph by the residual network.Astronomy and Astrophysics,646.
MLA Guo, Jingjing,et al."A nonlinear solar magnetic field calibration method for the filter-based magnetograph by the residual network".Astronomy and Astrophysics 646(2021).
Files in This Item:
File Name/Size DocType Version Access License
A nonlinear solar ma(18406KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Guo, Jingjing]'s Articles
[Bai, Xianyong]'s Articles
[Liu H(刘辉)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Guo, Jingjing]'s Articles
[Bai, Xianyong]'s Articles
[Liu H(刘辉)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Guo, Jingjing]'s Articles
[Bai, Xianyong]'s Articles
[Liu H(刘辉)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: A nonlinear solar magnetic field calibration method for the filter-based magnetograph by the residual network.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.