A Non-Linear Magnetic Field Calibration Method for Filter-Based Magnetographs by Multilayer Perceptron
文献类型：期刊论文
| 作者 | Guo, Jingjing1,2; Bai, Xianyong1; Deng, Yuanyong1; Liu, Hui3; Lin, Jiaben1; Su, Jiangtao1; Yang, Xiao1; Ji, Kaifan3 |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2020-01-09 |
| 卷号 | 295期号:1页码:18 |
| 关键词 | Magnetic fields Calibration Machine learning Multilayer perceptron |
| ISSN号 | 0038-0938 |
| DOI | 10.1007/s11207-019-1573-9 |
| 英文摘要 | For filter-based magnetographs, the linear calibration method under the weak-field assumption is usually adopted; this leads to magnetic saturation effect in the regions with strong magnetic field. This article explores a new method to overcome the above disadvantage using a multilayer perceptron network, which we call MagMLP, based on a back-propagation algorithm with one input layer, five hidden layers, and one output layer. We use the data from the Spectropolarimeter (SP) on board Hinode to simulate single-wavelength observations for the model training, and take into account the influence of the Doppler velocity field and the filling factor. The training results show that the linear fitting coefficient (LFC) of the transverse field reaches above 0.91, and that of the longitudinal field is above 0.98. The generalization of the models is good because the corresponding LFCs are above 0.9 for the test subsets. Compared with the linear calibration method, the MagMLP is much more effective on dealing with the magnetic saturation effect. Analyzing an active region, the results of the linear calibration present an evident magnetic saturation effect in the umbra regions; the corresponding systematic error reaches values greater than 1000 G in most areas, or even exceeds 2000 G at some pixels. However, the results of MagMLP at these locations are very close to the inversion results, and the systematic errors are basically within 300 G. In addition, we find that there are many "bright spots" and "dark spots" on the inclination angle images from the inversion results of Hinode/SP with values of 180 and 0 degrees, respectively, where the inversion is not reliable and does not produce a good result; the MagMLP handles these points well. |
| WOS关键词 | INVERSION ; TELESCOPE ; VECTOR |
| 资助项目 | Chinese Academy of Sciences[XDA15320300] ; Chinese Academy of Sciences[XDA15320302] ; Chinese Academy of Sciences[XDA15052200] ; Chinese Academy of Sciences[XDA15010800] ; Strategic Priority Research Program on Space Science ; National Natural Science Foundation of China (NSFC)[11873027] ; National Natural Science Foundation of China (NSFC)[11773072] ; National Natural Science Foundation of China (NSFC)[11427803] ; National Natural Science Foundation of China (NSFC)[11427901] ; National Natural Science Foundation of China (NSFC)[11773040] ; National Natural Science Foundation of China (NSFC)[11573012] ; National Natural Science Foundation of China (NSFC)[11833010] ; National Natural Science Foundation of China (NSFC)[11973056] ; National Natural Science Foundation of China (NSFC)[11873062] ; National Natural Science Foundation of China (NSFC)[11703042] ; Beijing Municipal Science and Technology[Z181100002918004] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000511861000001 |
| 出版者 | SPRINGER |
| 资助机构 | Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Beijing Municipal Science and Technology ; Beijing Municipal Science and Technology ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Beijing Municipal Science and Technology ; Beijing Municipal Science and Technology ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Beijing Municipal Science and Technology ; Beijing Municipal Science and Technology ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Beijing Municipal Science and Technology ; Beijing Municipal Science and Technology |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/54053]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Ji, Kaifan |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 3.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Jingjing,Bai, Xianyong,Deng, Yuanyong,et al. A Non-Linear Magnetic Field Calibration Method for Filter-Based Magnetographs by Multilayer Perceptron[J]. SOLAR PHYSICS,2020,295(1):18. |
| APA | Guo, Jingjing.,Bai, Xianyong.,Deng, Yuanyong.,Liu, Hui.,Lin, Jiaben.,...&Ji, Kaifan.(2020).A Non-Linear Magnetic Field Calibration Method for Filter-Based Magnetographs by Multilayer Perceptron.SOLAR PHYSICS,295(1),18. |
| MLA | Guo, Jingjing,et al."A Non-Linear Magnetic Field Calibration Method for Filter-Based Magnetographs by Multilayer Perceptron".SOLAR PHYSICS 295.1(2020):18. |
入库方式： OAI收割
来源：国家天文台
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