Angle Factor On-Orbit Calibration Method of Solar Diffuser Reflectance Degradation Monitor in Advanced Geosynchronous Radiation Imager

Wei Wang; Liming Zhang; Weiwei Xu; Xiaolong Si; Wenxin Huang

doi:10.3788/AOS202040.1128002

Acta Optica Sinica, Volume. 40, Issue 11, 1128002(2020)

Angle Factor On-Orbit Calibration Method of Solar Diffuser Reflectance Degradation Monitor in Advanced Geosynchronous Radiation Imager

Wei Wang^1,2、*, Liming Zhang^1、**, Weiwei Xu¹, Xiaolong Si^1,2, and Wenxin Huang¹

Author Affiliations

¹Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China

²University of Science and Technology of China, Hefei, Anhui 230026, China

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Figures & Tables(9)

Fig. 1. On-board calibration principle

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Fig. 2. Schematic diagram of laboratory measurement of sun view geometric factors

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Fig. 3. BRDF measurement principle diagram

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Fig. 4. Schematic of sun view DN

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Fig. 5. Schematic of diffuser view DN

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Fig. 6. Signal data of SDRDM at time angle of 0° for different bands. (a) B1; (b) B2; (3) B3

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Fig. 7. Comparison of measurement data in the laboratory and on-board data for different bands. (a) B1; (b) B2; (3) B3

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Table 1. Degradation factor diagram of different bands

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Table 1. Degradation factor diagram of different bands

Date	Degradation factor
Date	B1	B2	B3
2017-04-08	1.0000	1.0000	1.0000
2017-04-09	1.0000	1.0000	1.0000
2017-04-10	1.0000	1.0000	1.0000
2017-04-11	1.0000	1.0000	1.0000
2017-04-13	1.0000	1.0000	1.0000
2017-08-31	0.9971	0.9973	0.9981
2017-09-01	1.0017	1.0025	1.0028
2017-09-02	1.0012	1.0009	1.0011
2017-09-03	1.0003	1.0012	1.0019
2017-10-11	0.9979	1.0008	1.0009
2017-10-12	0.9997	1.0021	1.0025
2017-10-13	1.0004	1.0010	1.0017
2017-10-14	0.9984	0.9995	1.0007
2017-10-16	1.0049	1.0029	1.0033
2018-02-28	1.0020	1.0022	1.0026
2018-03-01	0.9993	1.0015	1.0023
2018-03-02	0.9990	1.0004	1.0017
2018-04-08	0.9989	1.0016	1.0008
2018-04-09	0.9991	1.0024	1.0016
2018-04-10	0.9997	1.0010	1.0007
2018-04-11	0.9980	0.9998	0.9999
2018-04-13	0.9986	0.9997	1.0001
Standard deviation	0.001609	0.001250	0.001222

Table 2. RMSE between laboratory data and on-board data
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Table 2. RMSE between laboratory data and on-board data
Band B1 B2 B3
RSME 0.003412 0.003697 0.004915

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Wei Wang, Liming Zhang, Weiwei Xu, Xiaolong Si, Wenxin Huang. Angle Factor On-Orbit Calibration Method of Solar Diffuser Reflectance Degradation Monitor in Advanced Geosynchronous Radiation Imager[J]. Acta Optica Sinica, 2020, 40(11): 1128002

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