Weight Determination Method for Multi-Site Ground Comprehensive Validation of Optical Sensors

Jingru Liu; Caixia Gao; Yaokai Liu; Yongguang Zhao; Lingling Ma; Shi Qiu; Chuanrong Li; Lingli Tang; Yonggang Qian; Ning Wang

doi:10.3788/AOS202040.1712002

Acta Optica Sinica, Volume. 40, Issue 17, 1712002(2020)

Weight Determination Method for Multi-Site Ground Comprehensive Validation of Optical Sensors

Jingru Liu^1,2, Caixia Gao^1、*, Yaokai Liu¹, Yongguang Zhao¹, Lingling Ma¹, Shi Qiu¹, Chuanrong Li¹, Lingli Tang¹, Yonggang Qian¹, and Ning Wang¹

Author Affiliations

¹Key Laboratory of Quantitative Remote Sensing Information Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

²School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

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Figures & Tables(12)

Fig. 1. Flow chart of the weight determination method for multi-site ground comprehensive validation of optical sensors

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Fig. 2. Surface reflectance of different targets

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Fig. 3. Automatic measurement system of Baotou site. (a) Permanent target; (b) desert target; (c) CE318 sun photometer

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Fig. 4. Spectral response function of ZY-3/MUX

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Fig. 5. Uncertainty analysis results of simulated TOA reflectance. (a) BOA; (b) atmospheric parameters; (c) overall uncertainty

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Fig. 6. Compared results for 12 samples. (a) Blue; (b) green; (c) red; (d) NIR

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Table 1. Imaging geometry information of ZY-3/MUX over Baotou site and corresponding atmospheric parameter

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Table 1. Imaging geometry information of ZY-3/MUX over Baotou site and corresponding atmospheric parameter

Data	Time	VZA /(°)	VAA /(°)	SZA /(°)	SAA /(°)	AOD	WVC /(g·cm^-2)
2018-05-27	3:24:17	7.13	14.55	25.17	135.93	0.1135	0.5803
2018-06-06	3:21:41	7.92	44.67	24.61	132.15	0.2137	0.9625
2018-07-25	3:25:49	6.48	11.21	27.60	134.31	0.0577	1.4378
2018-09-22	3:28:29	6.48	11.19	43.32	155.27	0.0330	0.4235

Table 2. Overall uncertainty of TOA reflectance of ZY-3/MUXunit:%

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Table 2. Overall uncertainty of TOA reflectance of ZY-3/MUXunit:%

Sample	1	2	3	4	5	6	7	8	9	10	11	12
Blue	3.50	3.44	3.45	3.36	4.07	4.00	4.24	4.04	3.42	3.46	3.53	3.36
Green	4.08	3.99	4.01	3.87	4.51	4.43	4.61	4.46	3.88	3.92	3.95	3.76
Red	4.68	4.60	4.69	4.58	4.85	4.80	4.91	4.77	4.20	4.31	4.29	4.01
NIR	5.12	5.02	5.15	5.07	5.08	5.10	5.08	4.97	4.40	4.62	4.45	4.18

Table 3. Uncertainty of relative difference between simulated value and observed valueunit:%

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Table 3. Uncertainty of relative difference between simulated value and observed valueunit:%

Sample	1	2	3	4	5	6	7	8	9	10	11	12
Blue	6.10	6.07	6.07	6.03	6.45	6.40	6.56	6.43	6.06	6.08	6.12	6.00
Green	6.45	6.40	6.41	6.32	6.73	6.68	6.80	6.70	6.33	6.35	6.37	6.25
Red	6.85	6.79	6.86	6.78	6.96	6.93	7.01	6.91	6.53	6.60	6.59	6.41
NIR	7.15	7.09	7.17	7.12	7.13	7.14	7.13	7.05	6.66	6.81	6.69	6.52

Table 4. Weighting coefficients of 12 samples

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Table 4. Weighting coefficients of 12 samples

Sample	1	2	3	4	5	6	7	8	9	10	11	12
Blue	0.0860	0.0869	0.0869	0.0871	0.0769	0.0781	0.0744	0.0774	0.0871	0.0866	0.0854	0.0871
Green	0.0843	0.0856	0.0853	0.0872	0.0774	0.0786	0.0758	0.0781	0.0872	0.0869	0.0864	0.0872
Red	0.0820	0.0834	0.0817	0.0837	0.0794	0.0801	0.0783	0.0805	0.0878	0.0878	0.0878	0.0878
NIR	0.0801	0.0815	0.0797	0.0808	0.0806	0.0803	0.0806	0.0824	0.0886	0.0883	0.0886	0.0886

Table 5. KCRV and its uncertaintyunit:%
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Table 5. KCRV and its uncertaintyunit:%
Band Blue Green Red NIR
KCRV 3.88 5.42 6.14 9.81
u(y) 1.79 1.87 1.96 2.02

Table 6. Degrees of equivalence of 12 samples

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Table 6. Degrees of equivalence of 12 samples

Sample	1	2	3	4	5	6	7	8	9	10	11	12
Blue	0.0016	0.0360	0.0308	0.0263	0.0004	0.0175	0.0663	0.0525	0.0302	0.0276	0.0153	0.0059
Green	0.0186	0.0531	0.0398	0.0176	0.0413	0.0135	0.1312	0.1079	0.0538	0.0434	0.0269	0.0442
Red	0.0257	0.0127	0.0036	0.0458	0.0422	0.0177	0.1556	0.0963	0.0557	0.0510	0.0336	0.0581
NIR	0.0444	0.0516	0.1388	0.0866	0.0312	0.0491	0.0268	0.0115	0.0740	0.0886	0.0411	0.0288

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Jingru Liu, Caixia Gao, Yaokai Liu, Yongguang Zhao, Lingling Ma, Shi Qiu, Chuanrong Li, Lingli Tang, Yonggang Qian, Ning Wang. Weight Determination Method for Multi-Site Ground Comprehensive Validation of Optical Sensors[J]. Acta Optica Sinica, 2020, 40(17): 1712002

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