A Method of Extracting Flat Field from Real Time Solar Observation Data
文献类型：期刊论文
| 作者 | Jin YH(金亚辉)1,2 ; Liu H(刘辉)2; Ji KF(季凯帆)2; Jin ZY(金振宇)2; Meng WJ(孟伟杰)1,2
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| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2025-02 |
| 卷号 | 300期号:2 |
| 关键词 | Flat field Data processing Chromosphere data Photosphere data |
| ISSN号 | 0038-0938 |
| DOI | 10.1007/s11207-025-02435-x |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Existing methods for obtaining a flat field rely on observed data collected under specific observation conditions to determine the flat field. However, the telescope pointing and the column-fixed pattern noise of the CMOS detector change during actual observations. This leads to the residual signals in real-time observation data after flat field correction, such as interference fringes and column-fixed pattern noise. In actual observations the wind causes the telescope to wobble slightly, which leads to shifts in the observed data. In this paper, we propose a method of extracting the flat field from the real-time solar observation data. Firstly, the average flat field obtained by multiframe averaging is used as the initial value. A set of real-time observation data is input into the KLL method to calculate the correction amount for the average flat field. Secondly, the average flat field is corrected using the calculated correction amount to obtain the real flat field for the current observation conditions. To overcome the residual solar structures caused by atmospheric turbulence in the correction amount, real-time observation data are grouped to calculate the correction amounts. These residual solar structures are suppressed by averaging multiple groups, improving the accuracy of the correction amount. The test results from diffraction-limited and ground-based simulated data demonstrate that our method can effectively calculate the correction amount for the average flat field. The New Vacuum Solar Telescope (NVST) He I 10830 & Aring;/H alpha\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\alpha $\end{document} data were also tested. High-resolution reconstruction confirms that the correction amount effectively corrects the average flat field to obtain the real flat field for the current observation conditions. Our method works for chromosphere and photosphere data. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS |
| WOS关键词 | TELESCOPE |
| 资助项目 | Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]; Yunnan Revitalization Talent Support Program[202305AT350005]; Yunnan Revitalization Talent Support Program[202305AS350029] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001417583200001 |
| 出版者 | SPRINGER |
| 资助机构 | Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009] ; Yunnan Revitalization Talent Support Program[202305AT350005, 202305AS350029] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28161]  |
| 专题 | 天文技术实验室 |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing, 100049, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China; |
| 推荐引用方式 GB/T 7714 | Jin YH,Liu H,Ji KF,et al. A Method of Extracting Flat Field from Real Time Solar Observation Data[J]. SOLAR PHYSICS,2025,300(2). |
| APA | 金亚辉,刘辉,季凯帆,金振宇,&孟伟杰.(2025).A Method of Extracting Flat Field from Real Time Solar Observation Data.SOLAR PHYSICS,300(2). |
| MLA | 金亚辉,et al."A Method of Extracting Flat Field from Real Time Solar Observation Data".SOLAR PHYSICS 300.2(2025). |
入库方式： OAI收割
来源：云南天文台
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