Accuracy Verification of On-Board Radiometric Calibration

Xin Li; Liming Zhang; Xiaolong Si; Hongyao Chen; Wenxin Huang; Qingjun Song

doi:10.3788/AOS202040.0928001

Journals >Acta Optica Sinica >Volume 40 >Issue 9 >Page 0928001 > Article

Acta Optica Sinica
Vol. 40, Issue 9, 0928001 (2020)

Accuracy Verification of On-Board Radiometric Calibration

Xin Li^1、2、*, Liming Zhang^1、2, Xiaolong Si^1、2, Hongyao Chen^1、2, Wenxin Huang^1、2, and Qingjun Song³

Author Affiliations

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

²Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China

³National Satellite Ocean Application Service, Beijing 100089, China

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DOI: 10.3788/AOS202040.0928001 Cite this Article Set citation alerts

Xin Li, Liming Zhang, Xiaolong Si, Hongyao Chen, Wenxin Huang, Qingjun Song. Accuracy Verification of On-Board Radiometric Calibration[J]. Acta Optica Sinica, 2020, 40(9): 0928001 Copy Citation Text

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Fig. 1. Flow chart of the cross validation

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Fig. 2. Common region of SCS and MODIS obtained on January 24, 2019

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Fig. 3. Texture matching in the common region of SCS and MODIS

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Fig. 4. Cross calibration region in the MODIS image obtained on January 24, 2019

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Fig. 5. Radiance and reflectance from SCS and MODIS images obtained on January 24, 2019

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Fig. 6. Cross calibration regions in the MODIS image. (a) Uniform region selected on February 28, 2019; (b) uniform region selected on March 13, 2019; (c) uniform region selected on April 4,2019

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Fig. 7. Radiance and reflectance results from SCS and MODIS images obtained on February 28, 2019. (a) Radiance; (b) reflectance

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Fig. 8. Radiance and reflectance results from SCS and MODIS images obtained on March 13, 2019. (a) Radiance; (b) reflectance

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Fig. 9. Radiance and reflectance results from SCS and MODIS images obtained on April 4, 2019. (a) Radiance; (b) reflectance

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Sensor	Average	Standard deviation	Uniformity /%
SCS	8908.000	95.940	1.08
MODIS	13558.148	417.247	3.08

Table 1. Statistic results of image data in the selected regions from SCS and MODIS obtained on January 24, 2019

Sensor	Solar zenith	Solar azimuth	View zenith	View azimuth
SCS	61.278	159.021	0	291.2880
MODIS	61.050	160.100	1.690	-85.3700

Table 2. Solar and view angles in the selected regions from SCS and MODIS on January 24, 2019(°)

Band	Radiance deviation /(μW·cm^-2·sr·nm^-1)	Reflectance deviation
B8	0.012	0.016
B9	0.016	0.012
B10	0.009	0.017
B11	0.029	0.036
B12	0.011	0.009
B13	0.048	0.054
B14	0.076	0.083
B15	0.037	0.046

Table 3. Deviation statistics of radiance and reflectance obtained on January 24, 2019

Date	Sensor	Average	Standard deviation	Uniformity /%
2019-02-28	SCS	8600.0	83.542	0.97
2019-02-28	MODIS	9834.2	119.289	1.21
2019-03-13	SCS	9532.8	90.302	0.95
2019-03-13	MODIS	11178.0	55.864	0.50
2019-04-04	SCS	7211.3	73.047	1.01
2019-04-04	MODIS	7914.5	70.045	0.89

Table 4. Statistic results of image data in the selected regions from SCS and MODIS on different dates

Date	Sensor	Solar zenith	Solar azimuth	View zenith	View azimuth
2019-02-28	SCS	34.571	135.424	0	180.203
2019-02-28	MODIS	34.390	135.800	4.3600	103.400
2019-03-13	SCS	30.443	130.025	0	180.158
2019-03-13	MODIS	30.040	130.680	1.1100	104.050
2019-04-04	SCS	35.942	150.039	0.1811	142.627
2019-04-04	MODIS	35.950	150.030	2.9200	98.410

Table 5. Solar and view angles in the selected regions from SCS and MODIS on different dates(°)

Band	Radiance deviation				Average
Band	2019-01-24	2019-02-28	2019-03-13	2019-04-04	Average
B8	0.014	0.009	0.007	0.012	0.011
B9	0.011	0.007	0.008	0.023	0.012
B10	0.008	0.017	0.010	0.010	0.011
B11	0.044	0.054	0.039	0.041	0.045
B12	0.027	0.043	0.024	0.024	0.030
B13	0.021	0.016	0.016	0.011	0.016
B14	0.047	0.015	0.018	0.011	0.023
B15	0.029	0.053	0.011	0.032	0.031

Table 6. Verification results of radiance(μW·cm^-2·sr·nm^-1)

Band	Reflectance deviation				Average
Band	2019-01-24	2019-02-28	2019-03-13	2019-04-04	Average
B8	0.014	0.013	0.011	0.013	0.013
B9	0.008	0.007	0.010	0.016	0.010
B10	0.007	0.014	0.009	0.022	0.013
B11	0.026	0.035	0.028	0.030	0.030
B12	0.016	0.025	0.016	0.033	0.023
B13	0.012	0.006	0.007	0.054	0.020
B14	0.029	0.006	0.008	0.056	0.025
B15	0.010	0.016	0.005	0.067	0.025

Table 7. Verification results of reflectance

Uncertainty factor	Uncertainty
BRDF	0.80
Uniformity (including attenuation screen)	0.60
Incident solar angle	0.35
Transmittance of attenuation screen	0.50
Pre-launch monitoring	0.50
Reference diffuser	0.54
Solar irradiance	1.00
Stray light and other factors	1.00
Synthetic uncertainty	1.97

Table 8. Radiance uncertainty of on-board caibration%

Band	Calibration capability
Band	2019-01-24	2019-02-28	2019-03-13	2019-04-04
B8	0.512	0.838	0.730	0.589
B9	0.462	0.497	0.465	0.335
B10	0.055	0.272	0.134	0.236
B11	0.507	0.690	0.421	0.719
B12	0.251	0.543	0.210	0.542
B13	0.582	0.152	0.517	0.166
B14	0.890	0.319	0.420	0.287
B15	0.165	0.851	0.112	0.776

Table 9. Verification results of on-board calibration capability

Xin Li, Liming Zhang, Xiaolong Si, Hongyao Chen, Wenxin Huang, Qingjun Song. Accuracy Verification of On-Board Radiometric Calibration[J]. Acta Optica Sinica, 2020, 40(9): 0928001

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