Radiation Consistency Correction of Dual Cameras Based on Lunar Calibration

Yang Bai; Lingli Wang; Hongyu Wu; Chao Cheng; Song Yang; Shuai Huang; Jie Zhang; Xing Zhong; Zhongfu Ye

doi:10.3788/AOS231216

Acta Optica Sinica, Volume. 44, Issue 12, 1212003(2024)

Radiation Consistency Correction of Dual Cameras Based on Lunar Calibration

Yang Bai^1,2, Lingli Wang^3、*, Hongyu Wu¹, Chao Cheng¹, Song Yang¹, Shuai Huang¹, Jie Zhang¹, Xing Zhong¹, and Zhongfu Ye²

Author Affiliations

¹Chang Guang Satellite Technology Co., Ltd., Changchun 130000, Jilin, China

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

³Realsee Technology (Beijing) Co., Ltd., Beijing 100089, China

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Figures & Tables(13)

Fig. 1. Lunar observation images of different phases in red spectrum of the eighth lunar month in 2020

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Fig. 2. Lunar image background signal exclusion

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Fig. 3. Simulation solar incident and satellite observation parameters

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Fig. 4. Lunar images of dual camera. (a) Lunar imaging results of camera 1; (b) lunar imaging results of camera 2

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Fig. 5. Dual camera lunar irradiance observation value and ROLO model irradiance

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Fig. 6. Comparison of consistency of dual camera calibration in desert scenes before and after calibration. (a) Before calibration; (b) after calibration

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Fig. 7. Test data of four different types of ground objects. (a) Before calibration; (b) after calibration

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Fig. 8. Test data of local areas corresponding to four different types of ground objects. (a) Before calibration; (b) after calibration

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Table 1. Technical specifications of multi-spectral imager of Jilin-1/GP02

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Table 1. Technical specifications of multi-spectral imager of Jilin-1/GP02

Band	Center wavelength /nm	Spectrum range /nm	Spatial resolution /m	Band	Center wavelength /nm	Spectrum range /nm	Spatial resolution /m
B0	624.08	450-800	5	B10	705.46	699-719	10
B1	415.21	403-423	5	B11	742.51	733-748	10
B2	444.69	433-453	5	B12	784.49	773-793	10
B3	483.36	450-515	5	B13	863.44	855-875	20
B4	559.61	525-600	5	B14	664.46	660-670	20
B5	656.75	630-680	5	B15	681.94	678-685	20
B6	836.14	785-900	5	B16	754.51	750-758	20
B7	487.41	485-495	10	B17	758.87	759-763	20
B8	619.41	615-625	10	B18	941.43	935-955	20
B9	660.75	650-680	10	B19	1013.97	1000-1040	20

Table 2. Calibration results of the system scale

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Table 2. Calibration results of the system scale

Parameter	Sensor
Parameter	JL1GP02_camera 1	JL1GP02_camera 2
Imaging time（BJT）	2020-05-07T18：34：24	2020-05-07T18：42：24
$Ω_{p}$ /sr	$Ω_{p 5 m}$ =8.518220412476446×10^-11（5 m）； $4 Ω_{p 5 m}$ （10 m）； $16 Ω_{p 5 m}$ （20 m）；
D_S‑M /km	151328095.123439	151327881.708937
D_V‑M /km	356193.985365	354436.011071
g /（°）	-0.123	-0.123
$Φ$ /（°）	2.730	2.798
φ /（°）	3.052	2.842
θ /（°）	-3.815	-4.291

Table 3. Correction value for absolute radiation calibration coefficient

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Table 3. Correction value for absolute radiation calibration coefficient

Spectrum	Center wavelength /nm	JL1GP02_ camera 1/%	JL1GP02_ camera 2/%
B1	414.2	22.56	0.36
B2	443.6	6.35	19.26
B3	484.7	2.97	3.92
B4	561.7	-0.61	4.55
B5	654.9	-8.25	-1.08
B6	833.5	-1.83	9.90
B7	487.2	5.00	4.28
B8	618.8	2.88	10.48
B9	660.7	4.70	8.28
B10	706.8	-5.17	-3.16
B11	742.7	-3.35	-2.33
B12	783.7	0.23	2.32
B13	862.2	7.20	12.06
B14	664.4	17.39	5.43
B15	682.5	0.00	0.00
B16	752.6	-1.82	-0.81
B17	759.8	-3.82	-4.94
B18	941.4	11.84	16.91
B19	1011.2	29.79	39.37

Table 4. RASE and ERGAS of dual camera calibration results for each group of test data before and after calibration

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Table 4. RASE and ERGAS of dual camera calibration results for each group of test data before and after calibration

Test data group	Process	RASE /%	ERGAS
1	Before calibration	17.888	410.503
1	After calibration	10.465	119.468
2	Before calibration	13.350	370.728
2	After calibration	3.490	19.373
3	Before calibration	33.925	893.463
3	After calibration	11.187	96.364
4	Before calibration	10.503	157.556
4	After calibration	10.189	150.062

Table 5. Calculation results of RASE and ERGAS between double camera lap area of each data group before and after calibration

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Table 5. Calculation results of RASE and ERGAS between double camera lap area of each data group before and after calibration

Test data group	Process	RASE /%	ERGAS
1	Before calibration	16.565	438.955
1	After calibration	6.736	75.252
2	Before calibration	10.680	231.993
2	After calibration	3.523	23.647
3	Before calibration	106.855	2578.530
3	After calibration	34.861	220.924
4	Before calibration	20.985	791.818
4	After calibration	10.773	156.961

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Yang Bai, Lingli Wang, Hongyu Wu, Chao Cheng, Song Yang, Shuai Huang, Jie Zhang, Xing Zhong, Zhongfu Ye. Radiation Consistency Correction of Dual Cameras Based on Lunar Calibration[J]. Acta Optica Sinica, 2024, 44(12): 1212003

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: Jul. 3, 2023

Accepted: Oct. 9, 2023

Published Online: May. 30, 2024

The Author Email: Wang Lingli (wll920707@sina.cn)

DOI:10.3788/AOS231216

CSTR:32393.14.AOS231216

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology