Calibration Method for Airborne Infrared Optical Systems in a Non-Thermal Equilibrium State

doi:10.3390/s23146326

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	Calibration Method for Airborne Infrared Optical Systems in a Non-Thermal Equilibrium State
	M. Dong; H. Shen; P. Jia; Y. Sun; C. Liang; F. Zhang and J. Hou
	2023
发表期刊	Sensors
ISSN	14248220
卷号	23 期号:14
摘要	Airborne infrared optical systems equipped with multiple cooled infrared cameras are commonly utilized for quantitative radiometry and thermometry measurements. Radiometric calibration is crucial for ensuring the accuracy and quantitative application of remote sensing camera data. Conventional radiometric calibration methods that consider internal stray radiation are usually based on the assumption that the entire system is in thermal equilibrium. However, this assumption leads to significant errors when applying the radiometric calibration results in actual mission scenarios. To address this issue, we analyzed the changes in optical temperature within the system and developed a simplified model to account for the internal stray radiation in the non-thermal equilibrium state. Building upon this model, we proposed an enhanced radiometric calibration method, which was applied to the absolute radiometric calibration procedure of the system. The radiometric calibration experiment, conducted on the medium-wave channel of the system within a temperature test chamber, demonstrated that the proposed method can achieve a calibration accuracy exceeding 3.78% within an ambient temperature range of −30 °C to 15 °C. Additionally, the maximum temperature measurement error was found to be less than ±1.01 °C. © 2023 by the authors.
DOI	10.3390/s23146326
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收录类别	sci ; ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67439
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	M. Dong,H. Shen,P. Jia,et al. Calibration Method for Airborne Infrared Optical Systems in a Non-Thermal Equilibrium State[J]. Sensors,2023,23(14).
APA	M. Dong,H. Shen,P. Jia,Y. Sun,C. Liang,&F. Zhang and J. Hou.(2023).Calibration Method for Airborne Infrared Optical Systems in a Non-Thermal Equilibrium State.Sensors,23(14).
MLA	M. Dong,et al."Calibration Method for Airborne Infrared Optical Systems in a Non-Thermal Equilibrium State".Sensors 23.14(2023).

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