Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction
The detection ability of SO<sub>2</sub> cameras has been improved effectively, while the calibration is still the main factor that limits their measurement accuracy. This paper presents a nonlinear calibration theory by considering the effect of light dilution due to the path radiance as...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/14/3652 |
| _version_ | 1797587578255310848 |
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| author | Kuijun Wu Jianjun Guo Zihao Zhang Huiliang Zhang Juan Li Faquan Li Weiwei He |
| author_facet | Kuijun Wu Jianjun Guo Zihao Zhang Huiliang Zhang Juan Li Faquan Li Weiwei He |
| author_sort | Kuijun Wu |
| collection | DOAJ |
| description | The detection ability of SO<sub>2</sub> cameras has been improved effectively, while the calibration is still the main factor that limits their measurement accuracy. This paper presents a nonlinear calibration theory by considering the effect of light dilution due to the path radiance as well as the dependence of plume aerosol on scattering wavelength. This new spectral calibration method is used to retrieve the SO<sub>2</sub> column density and emission rate of the Etna volcano. Results show that, compared with the DOAS calibration approach, the inversion error can be reduced by 13% if the new spectral calibration is adopted. The superiority of the proposed method will become more obvious for long-distance detection of optically thick plumes. |
| first_indexed | 2024-03-11T00:40:53Z |
| format | Article |
| id | doaj.art-47b8dd75710443c98443ee6a9f39fdc8 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T00:40:53Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-47b8dd75710443c98443ee6a9f39fdc82023-11-18T21:13:47ZengMDPI AGRemote Sensing2072-42922023-07-011514365210.3390/rs15143652Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect CorrectionKuijun Wu0Jianjun Guo1Zihao Zhang2Huiliang Zhang3Juan Li4Faquan Li5Weiwei He6School of Physics and Electronic Information, Yantai University, Yantai 264005, ChinaSchool of Physics and Electronic Information, Yantai University, Yantai 264005, ChinaSchool of Physics and Electronic Information, Yantai University, Yantai 264005, ChinaSchool of Physics and Electronic Information, Yantai University, Yantai 264005, ChinaKey Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, ChinaInnovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, ChinaSchool of Physics and Electronic Information, Yantai University, Yantai 264005, ChinaThe detection ability of SO<sub>2</sub> cameras has been improved effectively, while the calibration is still the main factor that limits their measurement accuracy. This paper presents a nonlinear calibration theory by considering the effect of light dilution due to the path radiance as well as the dependence of plume aerosol on scattering wavelength. This new spectral calibration method is used to retrieve the SO<sub>2</sub> column density and emission rate of the Etna volcano. Results show that, compared with the DOAS calibration approach, the inversion error can be reduced by 13% if the new spectral calibration is adopted. The superiority of the proposed method will become more obvious for long-distance detection of optically thick plumes.https://www.mdpi.com/2072-4292/15/14/3652SO<sub>2</sub> cameracalibrationlight dilutionatmospheric scatteringemission rate |
| spellingShingle | Kuijun Wu Jianjun Guo Zihao Zhang Huiliang Zhang Juan Li Faquan Li Weiwei He Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction Remote Sensing SO<sub>2</sub> camera calibration light dilution atmospheric scattering emission rate |
| title | Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction |
| title_full | Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction |
| title_fullStr | Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction |
| title_full_unstemmed | Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction |
| title_short | Spectral Calibration for SO<sub>2</sub> Cameras with Light Dilution Effect Correction |
| title_sort | spectral calibration for so sub 2 sub cameras with light dilution effect correction |
| topic | SO<sub>2</sub> camera calibration light dilution atmospheric scattering emission rate |
| url | https://www.mdpi.com/2072-4292/15/14/3652 |
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