Improving the radiance retrieval accuracy in limb sounding by utilizing a similarity model correcting the internal thermal radiation for an infrared radiometer

doi:10.1364/OL.537777

	Improving the radiance retrieval accuracy in limb sounding by utilizing a similarity model correcting the internal thermal radiation for an infrared radiometer
	Ceng DD(曾丹丹)1 ; Chen S(陈涉)1 ; Chen H(陈豪)1; Yan B(闫浡)1,2; Li SH(李帅辉)1,2
通讯作者	Li, Shuaihui([email protected])
发表期刊	OPTICS LETTERS
	2024-12-15
卷号	49 期号:24 页码:7142-7145
ISSN	0146-9592
摘要	For commercially available infrared radiometers with a small volume and a light weight and without an independent cooling system for the optical structure, thermal sensitivity is a key constraint for their application to high-precision limb observations. In this research, the response law of a medium wave (3.7-4.8 mu m) infrared radiometer with different thermal states is investigated, and emphasis is placed on the background gray variability caused by different thermal states. We construct a similarity model to describe the response difference. Utilizing the very small radiance of the upper atmosphere and the similarity model, we can correct the deviation caused by the thermal fluctuation of the sounder with high accuracy. The method of improving the retrieval accuracy is validated by simulating the limb-sounding scenarios with ground experiments. When the target radiance is 2.27 x 10-7 Wcm-2sr-1, a temperature difference of 2.5 degrees C causes a 918% deviation in the retrieved radiance, which can be reduced to 23% after correction with the similarity model proposed in this paper. This method can facilitate the application of portable radiometers in the field of high-precision detection. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
DOI	10.1364/OL.537777
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001380259300005
关键词[WOS]	SURFACE TEMPERATURE ; CALIBRATION ; SEA
WOS研究方向	Optics
WOS类目	Optics
论文分区	二类
力学所作者排名	1
RpAuthor	Li, Shuaihui
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/97992
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ceng DD,Chen S,Chen H,et al. Improving the radiance retrieval accuracy in limb sounding by utilizing a similarity model correcting the internal thermal radiation for an infrared radiometer[J]. OPTICS LETTERS,2024,49,24,:7142-7145.Rp_Au:Li, Shuaihui
APA	曾丹丹,陈涉,陈豪,闫浡,&李帅辉.(2024).Improving the radiance retrieval accuracy in limb sounding by utilizing a similarity model correcting the internal thermal radiation for an infrared radiometer.OPTICS LETTERS,49(24),7142-7145.
MLA	曾丹丹,et al."Improving the radiance retrieval accuracy in limb sounding by utilizing a similarity model correcting the internal thermal radiation for an infrared radiometer".OPTICS LETTERS 49.24(2024):7142-7145.