Calibration method of instrument line shape for infrared radiometer

doi:10.7498/aps.70.20210302

	Calibration method of instrument line shape for infrared radiometer
	Sun Yong-Feng 1,2; Xu Liang 1; Shen Xian-Chun 1; Wang Yu-Hao 1,2; Xu Han-Yang 1; Liu Wen-Qing 1
刊名	ACTA PHYSICA SINICA
	2021-07-20
卷号	70
关键词	remote sensing infrared spectrometer instrument line shape weight factor method
ISSN号	1000-3290
DOI	10.7498/aps.70.20210302
通讯作者	Xu Liang(xuliang@aiofm.ac.cn)
英文摘要	Interferometric infrared spectral radiometer has high luminous flux and large passing aperture, so the spectral data collected by the instrument are the convolution of the target spectral data and the instrument line shape (ILS). The main factors affecting the ILS include truncation effect, finite field of view effect, off-axis effect, defocus effect and relative position of detector and so on. In this paper the truncation effect, finite field of view effect, off-axis effect and defocus effect on ILS are expounded. These ILS errors all cause the ideal spectrum to drift towards the low wave number and widen. In this paper, the ideal absorption spectrum of water vapor is simulated by the line-by-line integration, through using MATLAB software and combining with the data of water vapor spectrum in HITRAN database, and the quantitative relationship between the error of instrument linear function and spectral distortion is established. According to the simulation results, a factor weight correction algorithm is proposed. It is believed that with this method, the error spectrum caused by ILS has the same optical properties as the ideal spectrum, but the optical path difference is different. Therefore, the coefficient matrix H can be constructed to establish the quantitative relationship between the error spectrum and the ideal spectrum, and the error spectrum can be corrected by using Landweber iterative algorithm. In this paper, the simulation data of water vapor absorption are used to verify the factor weight correction algorithm, and the spectral drift decreases from 0.51 cm(-1) to less than 0.01 cm(-1). The accuracy of the factor weight correction algorithm is verified by the experimental observation of the standard black body with self-developed interferometric infrared spectral radiometer. The spectral drift of the measured data decreases from 0.226 cm(-1) to 0.012 cm(-1), and the corrected spectral data are more accurate.
资助项目	Key Research Program of Frontier Sciences of Chinese Academy of Sciences[QYZDY-SSW-DQC016] ; Key Research and Development Plan of Anhui Province, China[1804d08020300] ; National Natural Science Foundation of China[41941011] ; National Key Research and Development Project, China[2016YFC0201002] ; National Key Research and Development Project, China[2016YFC0803001-08]
WOS关键词	TRANSFORM ; SPECTROSCOPY
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000677544100010
资助机构	Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; Key Research and Development Plan of Anhui Province, China ; National Natural Science Foundation of China ; National Key Research and Development Project, China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123140]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu Liang
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Sun Yong-Feng,Xu Liang,Shen Xian-Chun,et al. Calibration method of instrument line shape for infrared radiometer[J]. ACTA PHYSICA SINICA,2021,70.
APA	Sun Yong-Feng,Xu Liang,Shen Xian-Chun,Wang Yu-Hao,Xu Han-Yang,&Liu Wen-Qing.(2021).Calibration method of instrument line shape for infrared radiometer.ACTA PHYSICA SINICA,70.
MLA	Sun Yong-Feng,et al."Calibration method of instrument line shape for infrared radiometer".ACTA PHYSICA SINICA 70(2021).