Aerosol Retrieval Using Deep Learning and Radiative Transfer Model

Fig. 5. Scatter distribution of aerosol inversion results matched with AERONET measured data. (a) Beijing; (b) Beijing_CAMS; (c) Beijing_RADI; (d) XiangHe; (e) total

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Fig. 6. TOA of Landsat-8 changing with the increase of AOD

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Fig. 7. Spatial distribution of aerosol optical depth inversion results. (a)(b) RGB map and AOD map obtained by Lansat-8 on 2017-11-15; (c)(d) RGB map and AOD map obtained by Lansat-8 on 2019-09-02; (e)(f) RGB map and AOD map obtained by Lansat-8 on 2019-11-05; (g)(h) RGB map and AOD map obtained by Lansat-8 on 2017-07-10

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Table 1. Parameter settings for radiative transfer model

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Table 1. Parameter settings for radiative transfer model

Parameter	Symbol	Range or fixed value	Prior information
Sun zenith angle	asol	20°-70°	Landsat-8 metadata
View zenith angle	avis	5°	Landsat-8 metadata
Relative azimuth angle	phiv	115°-175°	Landsat-8 metadata
Atmospheric model	idatm	2， 3	Model default
Aerosol model（type）	iaer	1	Model default
AOD		0-2	AERONET site
Land surface reflectance	B1， B2 /μm	0.01-0.25	LaSRC
	B3 /μm	0.02-0.35
	B4 /μm	0.02-0.4
	B5， B6， B7 /μm	0.05-0.5

Table 2. Fitted equations between parameter information

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Table 2. Fitted equations between parameter information

Statistical type	Fitting function	Selection criteria
Angular geometry	$F (θ_{S}, φ)$	$\|- 1669 \times {θ_{S}}^{- 1.099} + 178.1 - φ\| < 5$
Visible spectrum	$F (B_{1}, B_{2})$	$\|1.159970 \times B_{1} + 0.0031 - B_{2}\| < 2 \times {E_{R M S}}_{B_{1}, B_{2}}$
	$F (B_{2}, B_{3})$	$\|1.103085 \times B_{2} + 0.0205 - B_{3}\| < 2 \times {E_{R M S}}_{B_{2}, B_{3}}$
	$F (B_{3}, B_{4})$	$\|1.264795 \times B_{3} - 0.0192 - B_{4}\| < 2 \times {E_{R M S}}_{B_{3}, B_{4}}$
SWIR	$F (B_{6}, B_{7})$	$\|1.9036 \times {B_{6}}^{2} + 0.1667 \times B_{6} + 0.0094 - B_{7}\| < 2 \times {E_{R M S}}_{B_{6}, B_{7}}$

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Xiaohu Sun, Lin Sun, Chen Jia, Feng Zhou. Aerosol Retrieval Using Deep Learning and Radiative Transfer Model[J]. Acta Optica Sinica, 2023, 43(24): 2401006

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Paper Information

Category: Atmospheric Optics and Oceanic Optics

Received: Mar. 14, 2023

Accepted: May. 19, 2023

Published Online: Dec. 8, 2023

The Author Email: Sun Lin (sunlin6@126.com)

DOI:10.3788/AOS230673

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