Researching | Research on emissivity directionality of radiometric calibration sites for optical sensors

Journal of Infrared and Millimeter Waves, Volume. 42, Issue 5, 687(2023)

Research on emissivity directionality of radiometric calibration sites for optical sensors

Jia-Xin LIU^1,3, Zhi-Wei YANG², Cai-Xia GAO^1、*, Hui-Ya MA^1,3, En-Yu ZHAO⁴, and Si-Bo DUAN⁵

Author Affiliations

¹National Engineering Laboratory for Satellite Remote Sensing Applications, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

²Xinjiang Transportation Planning Survey and Design Institute，Urumqi 830006，China

³University of Chinese Academy of Science，Beijing 100049，China

⁴College of Information Science and Technology，Dalian Maritime University，Dalian 116026，Liaoning，China

⁵Key Laboratory of Agri-informatics，Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning，Chinese Academy of Agricultural Sciences，Beijing 100081，China

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Figures&Tables (17)

References (35)

Paper Information

Figures & Tables(17)

Fig. 1. MODIS images over Algeria3, Algeria5, Libya1, Mauritania1 and Mauritania2 areas (study area is shown in red square)

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Fig. 2. Spectrum function of MODIS/29/31/32 and SEVIRI 7/9/10 channels

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Fig. 3. ECMWF /ERA5 atmospheric profile data over Algeria3_1 km

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Fig. 4. Technical flow chart

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Fig. 5. Multi-source sensor method/MYD21 directional emissivity results and comparison

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Fig. 6. Uncertainty tree of emissivity directional model

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Fig. 7. Model uncertainty caused by initial emissivity value

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Fig. 8. Model uncertainty caused by atmospheric temperature and humidity profiles

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Fig. 9. Model uncertainty caused by MODIS sensor calibration

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Fig. 10. Uncertainty caused by SEVIRI sensor calibration

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Fig. 11. Uncertainty caused by radiative transfer model

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Fig. 12. Total uncertainty of radiance directional model at each viewing zenith angle

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Table 1. Geographic information of the regions of interest
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Table 1. Geographic information of the regions of interest
场地名称经度/° 纬度/° 区域面积/Km²
Algeria3_1km 7.74 30.37 75×75
Algeria5_1km 2.13 31.37 75×75
Libya1_1km 13.35 24.12 50×50
Mauritania1_1km -9.20 19.60 50×50
Mauritania2_1km -8.63 20.70 75×75

Table 2. AQUA/MODIS and MSG-2/SEVIRI thermal infrared bands parameters

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Table 2. AQUA/MODIS and MSG-2/SEVIRI thermal infrared bands parameters

载荷	波段序号	中心波长/μm	光谱范围/μm	信噪比/NE∆T
MODIS	29	8.55	8.4~8.7	0.05 K
	30	9.73	9.58~9.88	0.25 K
	31	11.03	10.78~11.28	0.05 K
	32	12.02	11.77~12.27	0.05 K
	33	13.335	13.185~13.485	0.25 K
	34	13.635	13.485~13.785	0.25 K
	35	13.935	13.785~14.085	0.25 K
	36	14.235	14.085~14.385	0.35 K
SEVIRI	6	6.25	5.35~7.15	0.75 K
	7	8.7	8.3~9.1	0.28 K
	8	9.66	9.38~9.94	1.5 K
	9	10.8	9.8~11.8	0.25 K
	10	12	11~13	0.37 K
	11	13.4	12.4~14.4	1.80 K

Table 3. Number of samples under different viewing zenith angle intervals in each study area

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Table 3. Number of samples under different viewing zenith angle intervals in each study area

观测天顶角	0°~10°	10°~20°	20°~30°	30°~40°	40°~50°	50°~60°	60°~65°
Algeira3_1km	1 294	1 382	845	1 617	2 364	2 695	2 695
Algeira5_1km	1 286	1 450	686	2 940	2 342	2 940	2 574
Libya1_1km	1 372	837	833	1 519	2 058	1 323	2 842
Mauritania1_1km	637	476	927	827	1 323	1 862	1 519
Mauritania2_1km	637	619	670	815	1 315	1 503	1 911

Table 4. Empirical radiance directional model for each target area

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Table 4. Empirical radiance directional model for each target area

目标区域	波段	经验性模型	RMSE
Algeria3_1 km	29	$ε (θ) = 0.000 61 θ - 2.758 e - 05 θ^{2} + 0.765 7$	0.002 3
	31	$ε (θ) = 8.857 e - 05 θ - 9.889 e - 06 θ^{2} + 0.957 7$	0.001 7
	32	$ε (θ) = 0.00055 θ - 1.705 e - 05 θ^{2} + 0.973$	0.000 3
Algeria5_1 km	29	$ε (θ) = 0.710 2 + 0.032 17 \times c o s (w θ) + 0.016 26 \times s i n (w θ) (w = 0.043 25)$	0.003 4
	31	$ε (θ) = 0.815 9 + 0.136 2 \times c o s (w θ) - 0.010 05 \times s i n (w θ) (w = 0.009 1)$	0.001 9
	32	$ε (θ) = 0.966 + 0.007 8 \times c o s (w θ) + 0.002 4 \times s i n (w θ) (w = 0.048 17)$	0.001 1
Libya1_1 km	29	$ε (θ) = 0.001 1 θ - 3.194 e - 05 θ^{2} + 0.722 3$	0.003 4
	31	$ε (θ) = 0.000 95 θ - 2.771 e - 05 θ^{2} + 0.961 7$	0.003
	32	$ε (θ) = 0.943 3 + 0.027 0 \times c o s (w θ) + 0.025 48 \times s i n (w θ) (w = 0.034 2)$	0.003
Mauritania1_1 km	29	$ε (θ) = 0.000 29 θ - 2.721 e - 05 θ^{2} + 0.771 4$	0.002 9
	31	$ε (θ) = 0.000 21 θ - 1.293 e - 05 θ^{2} + 0.954 3$	0.000 8
	32	$ε (θ) = 0.944 1 + 0.035 7 \times c o s (w θ) + 0.011 8 \times s i n (w θ) (w = 0.031 05)$	0.000 7
Mauritania2_1 km	29	$ε (θ) = 0.001 14 θ - 4.677 e - 05 θ^{2} + 0.767 2$	0.007 1
	31	$ε (θ) = 0.000 66 θ - 2.262 e - 05 θ^{2} + 0.951 7$	0.003 4
	32	$ε (θ) = 0.000 28 θ - 1.397 e - 05 θ^{2} + 0.976 2$	0.001 5

Table 5. SEVIRI viewing zenith angle at the center of each study area
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Table 5. SEVIRI viewing zenith angle at the center of each study area
目标区域 Algeria3_1 km Algeria5_1 km
Libya1_
1 km
Mauritania1_1 km Mauritania2_1 km
中心区域SEVIRI
观测天顶角
37.5° 37.8° 33.3° 25.4° 22.8°

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Jia-Xin LIU, Zhi-Wei YANG, Cai-Xia GAO, Hui-Ya MA, En-Yu ZHAO, Si-Bo DUAN. Research on emissivity directionality of radiometric calibration sites for optical sensors[J]. Journal of Infrared and Millimeter Waves, 2023, 42(5): 687

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Paper Information

Category: Research Articles

Received: Dec. 30, 2022

Accepted: --

Published Online: Aug. 30, 2023

The Author Email: Cai-Xia GAO (gaocaixia@aoe.ac.cn)

DOI:10.11972/j.issn.1001-9014.2023.05.014

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology