Infrared and Laser Engineering, Volume. 51, Issue 7, 20220395(2022)
Research on real-time absolute radiometric calibration technology of infrared cameras
Figures & Tables(15)
Fig. 4. On orbit cross calibration flow chart of infrared channel remote sensor
Fig. 8. Radiance contrast between TERRA-MODIS and the infrared camera
Fig. 9. Radiance contrast between AQUA-MODIS and the infrared camera
Fig. 11. Comparison of cross calibration and site calibration results
Table 1. Error table of each link of site calibration
View tableView in ArticleTable 1. Error table of each link of site calibration
Error source Calibration error Measurement error Algorithm error Error Sensitivity coefficient Error contribution Moisture content 20% 20% 0.05% 1.0% Surface radiance 0.1% 0.5% 0.1%% 0.52% 1.0% 0.52% Solar zenith angle 1.0% 1.0% 0.1% 0.1% Intrinsic model precision 2.0% 2.0% 1.0% 2.0% Water meter emissivity 0.1% 0.1%% 1.0% 0.1% Land surface emissivity 0.1% 0.5% 0.5% 0.71% 1.0% 0.71% Satellite count value 0.1% 0.1% 0.14% 1.0% 0.14% Least square method 0.5% 0.5% 1.0% 0.50% Total error 2.46%
Table 2. Matching coefficients between thermal infrared channel of the infrared camera and MODIS and SEVIRI spectra
View tableView in ArticleTable 2. Matching coefficients between thermal infrared channel of the infrared camera and MODIS and SEVIRI spectra
Infrared camera and sensor a0 a1 a2 a3 a4 Relative error TERRA-modis 0.2865 （ch28） 0.0645 （ch29） 0.5952 （ch30） 0.3076 0.2146% AQUA-modis 0.2705 （ch28） 0.0865 （ch29） 0.5960 （ch30） 0.2970 0.2336 SEVIRI 0.0417 （ch7.3） 0.1965 （ch8.7） 0.4962 （ch9.7） 0.2485 （ch10.8） 0.1097 0.3407%
Table 3. MSG2/SEVIRI calibration accuracy and matching coefficient
View tableView in ArticleTable 3. MSG2/SEVIRI calibration accuracy and matching coefficient
Number Channel name Calibration accuracy/K Matching factor（a） 1 ch7.3 0.4 0.2901 2 ch8.7 0.5 0.4593 3 ch9.7 0.6 0.1969 4 ch10.8 0.8 0.1219
Table 4. Error table of each link of cross calibration
View tableView in ArticleTable 4. Error table of each link of cross calibration
Error source Error Sensitivity coefficient Error contribution Data matching 5.00% 0.20% 1.00% Spectral Matching 0.50% 1.00% 0.50% Filter 1.00% 0.10% 0.10% linear regression 1.00% 1.00% 1.00% Total error 1.50%
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Yuan Lv, Mingyu Cong, Yini Zhao, Kaiqing Niu, Ziwei Lu. Research on real-time absolute radiometric calibration technology of infrared cameras[J]. Infrared and Laser Engineering, 2022, 51(7): 20220395
Paper Information
Category: Infrared technology and application
Received: Jun. 15, 2021
Accepted: --
Published Online: Dec. 20, 2022
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