Radiometric Calibration Tracking Detection for FY-3A/MERSI by Joint Use of Snow Targets in South and North Poles

Ling Wang; Xiuqing Hu; Zhaojun Zheng; Lin Chen

doi:10.3788/AOS201838.0212003

Acta Optica Sinica, Volume. 38, Issue 2, 0212003(2018)

Radiometric Calibration Tracking Detection for FY-3A/MERSI by Joint Use of Snow Targets in South and North Poles

Ling Wang^1,2, Xiuqing Hu^1,2、*, Zhaojun Zheng^1,2, and Lin Chen^1,2

Author Affiliations

¹ National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China

² Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, Beijing 100081, China

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Figures & Tables(11)

Fig. 1. FY-3A/MERSI RGB images acquired over snow targets in south and north poles. (a) Greenland; (b) Dome C

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Fig. 2. Quadratic polynomial BRDF regression models of (a) Greenland and (b) Dome C based on TOA data of FY-3A/MERSI from January 2013 to December 2013

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Fig. 3. Observed values of TOA, predicted values of BRDF model and ratios of the observed values and predicted values of model for FY-3A/MERSI over Greenland. (a) Band 1; (b) band 2; (c) band 3; (d) band 4

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Fig. 4. Observed values of TOA, predicted values of BRDF model and ratios of the observed values and predicted values of model for FY-3A/MERSI over Dome C. (a) Band 1; (b) band 2; (c) band 3; (d) band 4

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Fig. 5. Time series and radiometric response degradation tracking results of normalized TOA of FY-3A/MERSI over Greenland and Dome C snow target. (a) Band 1; (b) band 2; (c) band 3; (d) band 4

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Fig. 6. Time series and radiometric response degradation tracking results of normalized TOA of FY-3A/MERSI band 8 over Greenland and Dome C snow target

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Fig. 7. Total degradation rate of reflected solar channel of FY-3A/MERSI from August 2008 to August 2012 derived from four different methods

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Table 1. FY-3A/MERSI spectral band specifications

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Table 1. FY-3A/MERSI spectral band specifications

Band	CW /μm	BW /μm	NEΔ ρ /%	Dynamic range	Band	CW /μm	BW /μm	NEΔ ρ /%	Dynamic range
1	0.470	0.05	0.43	100%	11	0.520	0.02	0.05	80%
2	0.550	0.05	0.43	100%	12	0.565	0.02	0.05	80%
3	0.650	0.05	0.43	100%	13	0.650	0.02	0.05	80%
4	0.865	0.05	0.43	100%	14	0.685	0.02	0.05	80%
5	11.25	2.5	0.4	330K	15	0.765	0.02	0.05	80%
6	1.640	0.05	0.08	90%	16	0.865	0.02	0.05	80%
7	2.130	0.05	0.07	90%	17	0.905	0.02	0.1	90%
8	0.412	0.02	0.1	80%	18	0.940	0.02	0.1	90%
9	0.443	0.02	0.1	80%	19	0.980	0.02	0.1	90%
10	0.490	0.02	0.05	80%	20	1.030	0.02	0.1	90%
Note: CW is central wavelength, BW is band width, NEΔ ρ is signal-to-noise ratio,bands 1-5 with a spatial resolution of 500 m, bands 6-20 with a spatial resolution of 1000 m.

Table 2. TOA BRDF model parameters and model error estimation for Greenland and Dome C

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Table 2. TOA BRDF model parameters and model error estimation for Greenland and Dome C

Band	Greenland					Dome C
Band	k₂	k₁	k₀	RMSE	R²	k₂	k₁	k₀	RMSE	R²
1	-0.5552	0.9113	0.5809	0.0063	0.953	-0.9883	1.0929	0.5899	0.0058	0.975
2	-0.2985	0.7713	0.5587	0.0099	0.936	-1.9993	2.0961	0.3422	0.0124	0.963
3	-0.6748	1.0214	0.5504	0.0084	0.913	-1.6637	1.7364	0.4542	0.0142	0.930
4	-2.0483	2.1817	0.3036	0.0122	0.538	-1.8850	1.8597	0.4138	0.0173	0.893
8	-0.4440	0.7431	0.5240	0.0061	0.938	-0.4636	0.7186	0.5415	0.0123	0.883
9	-0.4242	0.6898	0.5801	0.0048	0.950	-0.4557	0.6564	0.5957	0.0145	0.802
10	-0.4425	0.7627	0.6334	0.0045	0.969	-0.8980	1.0450	0.6052	0.0058	0.975
11	-0.4214	0.7650	0.6345	0.0065	0.945	-1.4023	1.4880	0.5266	0.0077	0.973
12	-0.1189	0.5081	0.5860	0.0108	0.894	-1.7994	1.8458	0.3613	0.0139	0.937
13	-0.8165	1.0983	0.5340	0.0069	0.910	-1.7883	1.7971	0.4418	0.0144	0.924
14	-1.0380	1.2775	0.4902	0.0067	0.884	-1.5797	1.6080	0.4660	0.0124	0.933
15	-1.2257	1.4491	0.3379	0.0070	0.860	-1.3203	1.4067	0.3846	0.0109	0.941
16	-1.8061	1.9063	0.3751	0.0112	0.588	-1.5385	1.5638	0.4704	0.0146	0.903
17	-2.3517	2.2946	0.2616	0.0225	0.314	-1.8884	1.6466	0.4659	0.0202	0.731
18	-3.3217	3.1006	-0.1976	0.0365	0.391	-2.0034	1.5659	0.2472	0.0226	0.499
19	-2.4339	2.2978	0.2264	0.0237	0.415	-1.7180	1.4790	0.4475	0.0191	0.696
20	-1.9092	1.7594	0.2845	0.0232	0.689	-2.0632	1.7159	0.3160	0.0122	0.827

Table 3. FY-3A/MERSI radiometric response tracking model parameters derived from RTOA time series from June 2008 to December 2014 over Greenland and Dome C, model uncertainty statistics and calculated radiomet

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Table 3. FY-3A/MERSI radiometric response tracking model parameters derived from RTOA time series from June 2008 to December 2014 over Greenland and Dome C, model uncertainty statistics and calculated radiomet

Band	Wavelength /nm	a₂	a₁	a₀	2σ/V_mean	Annual drift /%	Total drift /%
1	470	4.52×10^-8	-1.95×10^-4	1.2010	1.67	2.69	17.39
2	550	2.67×10^-8	-1.03×10^-4	1.0964	2.73	1.32	8.54
3	650	6.64×10^-9	-2.94×10^-6	0.9800	2.04	-0.47	-3.06
4	865	1.19×10^-8	-3.66×10^-5	1.0267	2.55	0.37	2.24
8	412	1.23×10^-7	-6.17×10^-4	1.7230	2.05	6.95	44.83
9	443	1.97×10^-8	-2.22×10^-4	1.3416	1.52	4.77	30.79
10	490	2.63×10^-8	-1.33×10^-4	1.1502	1.35	2.25	14.49
11	520	2.12×10^-8	-8.93×10^-5	1.0875	1.79	1.32	8.52
12	565	1.45×10^-8	-4.56×10^-5	1.0300	2.82	0.41	2.62
13	650	7.54×10^-9	-9.77×10^-6	0.9890	2.18	-0.30	-1.91
14	685	9.57×10^-9	-1.28×10^-5	0.9886	2.03	-0.36	-2.34
15	765	1.36×10^-8	-3.59×10^-5	1.0172	2.04	0.14	0.89
16	865	3.88×10^-10	-1.22×10^-5	1.0214	2.36	0.40	2.61
17	905	2.24×10^-8	-7.87×10^-5	1.0633	3.62	0.89	5.74
18	940	2.60×10^-8	-1.11×10^-4	1.1015	9.29	1.65	10.64
19	980	1.53×10^-8	-9.56×10^-5	1.1191	3.98	1.94	12.52
20	1030	4.97×10^-9	-1.39×10^-4	1.2385	4.90	3.75	24.19

Table 4. Total degradation rate of reflected solar channel of four methods and deviation of proposed method and other three methods derived from FY-3A/MERSI from August 2008 to August 2012

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Table 4. Total degradation rate of reflected solar channel of four methods and deviation of proposed method and other three methods derived from FY-3A/MERSI from August 2008 to August 2012

Band	Degradation /%				Degradation difference /%
Band	Snow	DCC	Multi-site	Dunhuang	Snow/DCC	Snow/multi-site	Snow/Dunhuang
1	15.72	14.48	18.18	14.44	1.24	-2.46	1.28
2	8.06	5.79	9.12	5.67	2.27	-1.06	2.39
3	-1.30	-2.44	-2.46	0.83	1.14	1.16	-2.13
4	2.97	0.52	-0.31	2.14	2.45	3.28	0.83
8	37.63	37.87	38.08	36.76	-0.23	-0.45	0.87
9	20.84	20.89	23.94	30.65	-0.05	-3.10	-9.81
10	11.92	11.41	15.67	10.74	0.51	-3.75	1.18
11	7.50	2.59	12.04	8.57	4.91	-4.54	-1.07
12	2.84	2.48	6.00	3.75	0.37	-3.16	-0.91
13	-0.61	-1.87	-1.32	0.45	1.26	0.71	-1.06
14	-0.44	-1.60	-1.59	1.43	1.16	1.15	-1.87
15	2.30	1.59	1.81	1.79	0.71	0.49	0.51
16	1.58	-0.21	1.21	3.81	1.79	0.37	-2.23
17	6.65	5.77	7.13	4.00	0.88	-0.48	2.65
18	10.72	9.00	14.52	16.00	1.73	-3.80	-5.28
19	10.05	7.84	10.18	11.92	2.21	-0.13	-1.87
20	15.64	15.87	16.06	17.33	-0.23	-0.42	-1.69

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Ling Wang, Xiuqing Hu, Zhaojun Zheng, Lin Chen. Radiometric Calibration Tracking Detection for FY-3A/MERSI by Joint Use of Snow Targets in South and North Poles[J]. Acta Optica Sinica, 2018, 38(2): 0212003

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: Jun. 5, 2017

Accepted: --

Published Online: Aug. 30, 2018

The Author Email: Hu Xiuqing (huxq@cma.gov.cn)

DOI:10.3788/AOS201838.0212003

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