Improving Image Quality of the Solar Disk Imager (SDI) of the Lyα Solar Telescope (LST) Onboard the ASO-S Mission

doi:10.1088/1674-4527/ada425

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	Improving Image Quality of the Solar Disk Imager (SDI) of the Lyα Solar Telescope (LST) Onboard the ASO-S Mission
	Liu H(刘辉)1 ; Li, Hui 2,3; Zou SZ(邹思仲)1 ; Ji KF(季凯帆)1 ; Jin ZY(金振宇)1 ; Shan, Jiahui 2; Li, Jingwei 2; Shi, Guanglu 2; Huang, Yu 2,3; Feng, Li 2,3; Xue, Jianchao 2; Li, Qiao 2; Song, Dechao 2; Li, Ying 2,3
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2025-02-01
卷号	25 期号:2
DOI	10.1088/1674-4527/ada425
产权排序	第1完成单位
收录类别	SCI
关键词	techniques: image processing Sun: chromosphere Sun: flares methods: numerical
摘要	The in-flight calibration and performance of the Solar Disk Imager (SDI), which is a pivotal instrument of the Ly alpha Solar Telescope onboard the Advanced Space-based Solar Observatory mission, suggested a much lower spatial resolution than expected. In this paper, we developed the SDI point-spread function (PSF) and Image Bivariate Optimization Algorithm (SPIBOA) to improve the quality of SDI images. The bivariate optimization method smartly combines deep learning with optical system modeling. Despite the lack of information about the real image taken by SDI and the optical system function, this algorithm effectively estimates the PSF of the SDI imaging system directly from a large sample of observational data. We use the estimated PSF to conduct deconvolution correction to observed SDI images, and the resulting images show that the spatial resolution after correction has increased by a factor of more than three with respect to the observed ones. Meanwhile, our method also significantly reduces the inherent noise in the observed SDI images. The SPIBOA has now been successfully integrated into the routine SDI data processing, providing important support for the scientific studies based on the data. The development and application of SPIBOA also paves new ways to identify astronomical telescope systems and enhance observational image quality. Some essential factors and precautions in applying the SPIBOA method are also discussed.
资助项目	National Natural Science Foundation of China (NSFC)[12233012]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560102]; National Key R&D Program of China[2022YFF0503003]; National Key R&D Program of China[2022YFF0503000]
项目资助者	National Natural Science Foundation of China (NSFC)[12233012] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560102] ; National Key R&D Program of China[2022YFF0503003, 2022YFF0503000]
语种	英语
学科领域	天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	1674-4527
URL	查看原文
WOS记录号	WOS:001408784400001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	NEURAL-NETWORK ; ADAPTIVE OPTICS ; SYSTEM
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/28058
专题	天文技术实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 2.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China; [email protected]; 3.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Liu H,Li, Hui,Zou SZ,et al. Improving Image Quality of the Solar Disk Imager (SDI) of the Lyα Solar Telescope (LST) Onboard the ASO-S Mission[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2025,25(2).
APA	刘辉.,Li, Hui.,邹思仲.,季凯帆.,金振宇.,...&Li, Ying.(2025).Improving Image Quality of the Solar Disk Imager (SDI) of the Lyα Solar Telescope (LST) Onboard the ASO-S Mission.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,25(2).
MLA	刘辉,et al."Improving Image Quality of the Solar Disk Imager (SDI) of the Lyα Solar Telescope (LST) Onboard the ASO-S Mission".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 25.2(2025).

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