Scattering Polarization Characteristics of Aerosols in Actual Weather Conditions

Fig. 4. Scattering radiation intensity of aerosol in low-visibility weather. (a) Curve of downward I with solar zenith angle; (b) curve of upward I with solar zenith angle; (c) curve of downward Q with solar zenith angle; (d) curve of upward Q with solar zenith angle; (e) curve of downward U with solar zenith angle; (f) curve of upward U with solar zenith angle

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Fig. 5. Scattering radiation intensity of aerosol in high-visibility weather. (a) Curve of downward I with solar zenith angle; (b) curve of upward I with solar zenith angle; (c) curve of downward Q with solar zenith angle; (d) curve of upward Q with solar zenith angle; (e) curve of downward U with solar zenith angle; (f) curve of upward U with solar zenith angle

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Fig. 6. Linear polarization degree of each order scattering in low-visibility weather. (a) Curve of downward polarization degree versus solar zenith angle; (b) curve of upward polarization degree versus solar zenith angle

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Fig. 7. Linear polarization degree of each order scattering in high-visibility weather. (a) Curve of downward polarization degree versus solar zenith angle; (b) curve of upward polarization degree versus solar zenith angle

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Table 1. Parameter of coupled surface reflection model
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Table 1. Parameter of coupled surface reflection model
Parameter Value
Single scatter albedo 0.02
$N$ 1.34
$K_{0}$ 0.349
$K_{1}$ 0.044
$K_{2}$ 0.377
$ρ$ 0.0229
$β$ 38.0

Table 2. Parameters of aerosol particles

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Table 2. Parameters of aerosol particles

Date	Visibility /km	Optical depth	Complex refractive index	Standard deviation of visibility /km	Standard deviation of optical depth
9.9	2.2	1.4270	1.4564+0.0021i	2.113	0.1430
9.30	7.1	0.7337	1.4479+0.0056i	3.853	0.1610
9.4	25.6	0.6413	1.4415+0.0036i	4.534	0.1367
9.18	29.1	0.0519	1.5494+0.0088i	2.422	0.0154
9.24	29.5	0.0910	1.5452+0.0065i	0.926	0.0119
9.23	30.0	0.0855	1.5508+0.0089i	0	0.0237

Table 3. Proportion of the first-order scattered radiation intensity to the total scattered radiation intensity
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Table 3. Proportion of the first-order scattered radiation intensity to the total scattered radiation intensity
Scattered radiation intensity Low-visibility weather /% High-visibility weather /%
Downward I 56.2 50.3
Q 88.1 91.2
U 54.4 83.2
Upward I 32.2 40.5
Q 70.3 77.0
U 70.4 74.1

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Yuzhao Ma, Chen Gao, Jun Zhu. Scattering Polarization Characteristics of Aerosols in Actual Weather Conditions[J]. Laser & Optoelectronics Progress, 2023, 60(21): 2101001

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