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Real-Time Monitoring of $SO_{2}$ Emissions Using a UV Camera with Built-in $NO_{2}$ and Aerosol Corrections
| Content Provider | MDPI |
|---|---|
| Author | Xiong, Yuanhui Wu, Kuijun Yu, Guangbao Chen, Zhenwei Liu, Linmei Li, Faquan |
| Copyright Year | 2022 |
| Description | Nitrogen dioxide $(NO_{2}$) absorption correction of the sulfur dioxide $(SO_{2}$) camera was demonstrated for the first time. The key to improving the measurement accuracy is to combine a differential optical absorption spectroscopy (DOAS) instrument with the $SO_{2}$ camera for the real-time $NO_{2}$ absorption correction and aerosol scattering correction. This method performs $NO_{2}$ absorption correction by the correlation between the $NO_{2}$ column density measurement of the DOAS and the $NO_{2}$ optical depth of the corresponding channel from the $SO_{2}$ camera at a narrow wavelength window around 310 and 310 nm. The error of correction method is estimated through comparison with only using the second channel of the traditional $SO_{2}$ camera to correct for aerosol scattering and it can be reduced by 11.3% after $NO_{2}$ absorption corrections. We validate the correction method through experiments and demonstrate it to be of greatly improved accuracy. The result shows that the ultraviolet (UV) $SO_{2}$ camera system with $NO_{2}$ absorption corrections appears to have great application prospects as a technology for visualized real-time monitoring of $SO_{2}$ emissions. |
| Starting Page | 3900 |
| e-ISSN | 14248220 |
| DOI | 10.3390/s22103900 |
| Journal | Sensors |
| Issue Number | 10 |
| Volume Number | 22 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-20 |
| Access Restriction | Open |
| Subject Keyword | Sensors So2 Camera Uv Imaging No2 Absorption Correction Aerosol Scattering Remote Sensing Doas |
| Content Type | Text |
| Resource Type | Article |
