Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field
This study is to correct magnetic saturation and wavelength shift in Full-disk Magnetograph (FMG) solar magnetic field measurements on the Advanced Space-based Solar Observatory (ASO-S) satellite. Due to its single-wavelength polarization data limitations, currently, FMG relies on linear calibration...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-03-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/11/4/108 |
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| author | Ziyao Hu Kaifan Ji Xianyong Bai Yuanyong Deng Jiangtao Su Jingjing Guo Suo Liu Xiao Yang |
| author_facet | Ziyao Hu Kaifan Ji Xianyong Bai Yuanyong Deng Jiangtao Su Jingjing Guo Suo Liu Xiao Yang |
| author_sort | Ziyao Hu |
| collection | DOAJ |
| description | This study is to correct magnetic saturation and wavelength shift in Full-disk Magnetograph (FMG) solar magnetic field measurements on the Advanced Space-based Solar Observatory (ASO-S) satellite. Due to its single-wavelength polarization data limitations, currently, FMG relies on linear calibration. We propose a residual network model to output a line-of-sight (LOS) magnetic field which is trained with HMI LOS magnetic fields as target, and FMG Stokes <i>I</i>, <i>V</i> data and LOS velocity components as inputs. Compared to traditional methods, our model achieves lower MAE, RMSE, and improved consistency with the target, while also demonstrating robustness to wavelength shift, offering more accurate magnetic field measurements. |
| format | Article |
| id | doaj-art-545dcdcc53c44d86b866be45e17ce775 |
| institution | OA Journals |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj-art-545dcdcc53c44d86b866be45e17ce7752025-08-20T02:18:05ZengMDPI AGUniverse2218-19972025-03-0111410810.3390/universe11040108Nonlinear Calibration Method for FMG Line-of-Sight Magnetic FieldZiyao Hu0Kaifan Ji1Xianyong Bai2Yuanyong Deng3Jiangtao Su4Jingjing Guo5Suo Liu6Xiao Yang7National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, ChinaYunnan Observatories, Chinese Academy of Sciences, Kunming 650216, ChinaNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, ChinaNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, ChinaNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, ChinaSchool of Big Data and Artificial Intelligence, Chizhou University, Chizhou 247000, ChinaNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, ChinaNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, ChinaThis study is to correct magnetic saturation and wavelength shift in Full-disk Magnetograph (FMG) solar magnetic field measurements on the Advanced Space-based Solar Observatory (ASO-S) satellite. Due to its single-wavelength polarization data limitations, currently, FMG relies on linear calibration. We propose a residual network model to output a line-of-sight (LOS) magnetic field which is trained with HMI LOS magnetic fields as target, and FMG Stokes <i>I</i>, <i>V</i> data and LOS velocity components as inputs. Compared to traditional methods, our model achieves lower MAE, RMSE, and improved consistency with the target, while also demonstrating robustness to wavelength shift, offering more accurate magnetic field measurements.https://www.mdpi.com/2218-1997/11/4/108solarmagnetic fieldsmachine learning |
| spellingShingle | Ziyao Hu Kaifan Ji Xianyong Bai Yuanyong Deng Jiangtao Su Jingjing Guo Suo Liu Xiao Yang Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field Universe solar magnetic fields machine learning |
| title | Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field |
| title_full | Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field |
| title_fullStr | Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field |
| title_full_unstemmed | Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field |
| title_short | Nonlinear Calibration Method for FMG Line-of-Sight Magnetic Field |
| title_sort | nonlinear calibration method for fmg line of sight magnetic field |
| topic | solar magnetic fields machine learning |
| url | https://www.mdpi.com/2218-1997/11/4/108 |
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