Jianjun GUO, Faquan LI, Zihao ZHANG, Huiliang ZHANG, Juan LI, Kuijun WU, Weiwei HE. Retrieval of volcanic SO2 emission rate[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(1): 98
- Journal of Atmospheric and Environmental Optics
- Vol. 19, Issue 1, 98 (2024)
Fig. 1. Schematic diagram of smoke plume taken by SO2 camera
Fig. 2. Simple diagram of neural network
Fig. 3. Flow chart of SO2 emission rate
Fig. 4. SO2 concentration inversion. (a) 310 nm optical density image; (b) 330 nm optical density image;(c) calibration curve; (d) SO2 concentration image
Fig. 5. Original optical flow image (including plume cross-section for emission rate inversion)
Fig. 6. Speed of cross correlation method, Farneback optical flow and neural network optical flow method
Fig. 7. Emission rate retrieval of cross correlation method, Farneback optical flow and neural network optical flow method
Fig. 8. SO2 emission rate of edge plume cross-section
Fig. 9. Mean SO2 emission rates (a) and errors (b) for plume cross-sections in columns 1243-1343
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Table 1. Main information of the SO2 camera and spectrometer used in the experiment on September 16，2015[15]
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