Inversion of aerosol optical depth over land from directional polarimetric camera onboard chinese Gaofen-5 satellite

Hong-Lian HUANG; Ru-Fang TI; Dong-Ying ZHANG; Wei FANG; Xiao-Bin SUN; Wei-Ning YI

doi:10.11972/j.issn.1001-9014.2020.04.010

Journals >Journal of Infrared and Millimeter Waves >Volume 39 >Issue 4 >Page 454 > Article

Journal of Infrared and Millimeter Waves
Vol. 39, Issue 4, 454 (2020)

Inversion of aerosol optical depth over land from directional polarimetric camera onboard chinese Gaofen-5 satellite

Hong-Lian HUANG, Ru-Fang TI, Dong-Ying ZHANG, Wei FANG, Xiao-Bin SUN, and Wei-Ning YI

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DOI: 10.11972/j.issn.1001-9014.2020.04.010 Cite this Article

Hong-Lian HUANG, Ru-Fang TI, Dong-Ying ZHANG, Wei FANG, Xiao-Bin SUN, Wei-Ning YI. Inversion of aerosol optical depth over land from directional polarimetric camera onboard chinese Gaofen-5 satellite[J]. Journal of Infrared and Millimeter Waves, 2020, 39(4): 454 Copy Citation Text

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Fig. 1. Comparison of DPC and MODIS retrieved AOD on September 4, 2018

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Fig. 2. Comparison of DPC and MODIS retrieved AOD on October 2, 2018

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Fig. 3. Comparison of DPC and AERONET retrieved AOD

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Fig. 4. Comparison of MODIS and AERONET retrieved AOD

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仪器参数	数值
工作谱段	443 nm、490 nm（P）、56 5nm、670 nm（P）、763 nm、765 nm、865 nm（P）、910 nm
偏振解析	线偏振，三个方向0°、60°、120°
总视场	-50°～+50°
多角度观测	最大12个角度
星下点空间分辨率	3.3 km
辐射定标误差	≤5%
偏振定标误差	≤0.02

Table 1. DPC载荷主要技术参数

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参数	范围	步长	个数
波长	660~680 nm 845~885 nm		2
太阳天顶角	0°~80°	2°	41
观测天顶角	0°~87°	约6°	16
相对方位角	0°~180°	5°	37
光学厚度	0.0~0.2	0.02	11
	0.2~0.8	0.05	12
	0.8~2.0	0.15	8
	2.0~2.9	0.3	3
气溶胶模型	6种		6

Table 2. 查找表参数设置

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参数	模型1	模型2	模型3	模型4	模型5	模型6
单次散射反照率	0.93	0.80	0.88	0.92	0.93	0.72
复折射率实部（673 nm）	1.4520	1.5202	1.4494	1.4098	1.3943	1.4104
复折射率虚部（673 nm）	0.0036	0.0245	0.0092	0.0063	0.0044	0.0337
细模态平均半径/μm	0.117	0.144	0.133	0.158	0.165	0.140
细模态标准偏差	1.482	1.562	1.502	1.526	1.611	1.540
粗模态平均半径/μm	2.834	3.733	3.590	3.547	3.268	3.556
粗模态标准偏差	1.908	2.144	2.104	2.065	1.995	2.134
细粒子比	0.22	0.33	0.38	0.53	0.26	0.49

Table 3. 气溶胶模型参数列表

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地表类型	NDVI	X×100	Y
森林	0~0.15	0.7	120
	0.15~0.3	0.75	125
	≥0.3	0.65	120
灌木	0~0.15	1.5	90
	0.15~0.3	0.95	120
	≥0.3	0.7	140
低植被	0~0.15	1.3	90
	0.15~0.3	0.95	90
	≥0.3	0.75	130
沙漠	0~0.15	2.5	45
沙漠	≥0.15	2.5	45

Table 4. NB半经验模型参数表

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