Fangli JI, Xin ZHAO, Fuqi SI, Haijin ZHOU, Yuanyuan QIAN, Taiping YANG. Research on DOAS algorithm based on discrete wavelength[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(6): 624
- Journal of Atmospheric and Environmental Optics
- Vol. 19, Issue 6, 624 (2024)
Fig. 1. DW-DOAS algorithm data processing flow chart
![[in Chinese]](/richHtml/dqyhjgx/2024/19/6/624/img_02.jpg)
Fig. 2. [in Chinese]
Fig. 3. Fitting results of DW-DOAS and DOAS retrieving NO2 SCD when select different FWHM on January 1, 2019.(a) 1 nm; (b) 2 nm; (c) 3 nm; (d) 4 nm
Fig. 4. NO2 absorption cross section (solid line) and selected central wavelength (dashed line) for ground data
Fig. 5. Fitting results of DW-DOAS and DOAS retrieving NO2 SCD when select different elevation from January 1 to March 31, 2019. (a) 5°; (b) 10°; (c) 20°; (d)30°
Fig. 6. NO2 absorption cross section (solid line) and selected central wavelength (dashed line) for EMI data
Fig. 7. NO2 SCD retrieved by DOAS (a) and corresponding by DW-DOAS (b) for one orbit of 6 January 2019, and the relative differences (c) between them
Fig. 8. Fitting results of DW-DOAS and DOAS retrieving NO2 SCD for one orbit of 6 January 2019
Fig. 9. NO2 SCD retrieved by DOAS (a) and corresponding by DW-DOAS (b) for all orbits of 6 January 2019, and the relative differences (c) between them
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Table 1. NO2 SCD retrieval details for DOAS and DW-DOAS
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Table 2. The results of retrieving NO2 SCD at elevation angles of 5°，10°，20°and 30°
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