Resolution Enhancement of SOHO/MDI Magnetograms

doi:10.1088/1674-4527/ad3b3b

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	Resolution Enhancement of SOHO/MDI Magnetograms
	Tan Y(覃瑛)2,3,4; Ji KF(季凯帆)1,2,4; Liu H(刘辉)1,2,4; Yu XG(余晓光)1,2,4
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2024-06-01
卷号	24 期号:6
关键词	magnetic fields techniques: image processing virtual observatory tools Sun: magnetic fields
ISSN号	1674-4527
DOI	10.1088/1674-4527/ad3b3b
产权排序	第1完成单位
文献子类	Article
英文摘要	Research on the solar magnetic field and its effects on solar dynamo mechanisms and space weather events has benefited from the continual improvements in instrument resolution and measurement frequency. The augmentation and assimilation of historical observational data timelines also play a significant role in understanding the patterns of solar magnetic field variation. Within the realm of astronomical data processing, super-resolution (SR) reconstruction refers to the process of using a substantial corpus of training data to learn the nonlinear mapping between low-resolution (LR) and high-resolution (HR) images, thereby achieving higher-resolution astronomical images. This paper is an application study in high-dimensional nonlinear regression. Deep learning models were employed to perform SR modeling on SOHO/MDI magnetograms and SDO/HMI magnetograms, thus reliably achieving resolution enhancement of full-disk SOHO/MDI magnetograms and enhancing the image resolution to obtain more detailed information. For this study, a data set comprising 9717 pairs of data from 2010 April to 2011 February was used as the training set, 1332 pairs from 2011 March were used as the validation set and 1034 pairs from 2011 April were used as the test set. After data preprocessing, we randomly cropped 128 x 128 sub-images as the LR cases from the full-disk MDI magnetograms, and the corresponding 512 x 512 sub-images as HR ones from the HMI full-disk magnetograms for model training. The tests conducted have shown that the study successfully produced reliable 4x SR reconstruction of full-disk MDI magnetograms. The MESR model's results (0.911) were highly correlated with the target HMI magnetographs as indicated by the correlation coefficient values. Furthermore, the method achieved the best PSNR, SSIM, MAE and RMSE values, indicating that the MESR model can effectively reconstruct magnetograms.
学科主题	天文学 ; 太阳与太阳系
URL标识	查看原文
出版地	20A DATUN RD, CHAOYANG, BEIJING, 100101, PEOPLES R CHINA
资助项目	National Natural Science Foundation of China (NSFC)[12003068]; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]
WOS关键词	DEEP ; SUPERRESOLUTION ; MISSION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:001249981300001
资助机构	National Natural Science Foundation of China (NSFC)[12003068] ; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/27412]
专题	云南天文台_丽江天文观测站（南方基地）
作者单位	1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China 2.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; qinying@ynao.ac.cn, jkf@ynao.ac.cn;
推荐引用方式 GB/T 7714	Tan Y,Ji KF,Liu H,et al. Resolution Enhancement of SOHO/MDI Magnetograms[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2024,24(6).
APA	覃瑛,季凯帆,刘辉,&余晓光.(2024).Resolution Enhancement of SOHO/MDI Magnetograms.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,24(6).
MLA	覃瑛,et al."Resolution Enhancement of SOHO/MDI Magnetograms".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 24.6(2024).