Laser heterodyne spectroradiometer assisted by self-calibrated wavelength modulation spectroscopy for atmospheric CO2 column absorption measurements

doi:10.1016/j.saa.2020.118071

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	Laser heterodyne spectroradiometer assisted by self-calibrated wavelength modulation spectroscopy for atmospheric CO2 column absorption measurements
	H. Deng,M. X. Li,Y. B. He,Z. Y. Xu,L. Yao,B. Chen,C. G. Yang and R. F. Kan
刊名	Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
	2020
卷号	230 页码:6
ISSN号	1386-1425
DOI	10.1016/j.saa.2020.118071
英文摘要	We have developed a laser heterodyne spectroradiometer in combination with self-calibrated wavelength modulation spectroscopy based on a software-based lock-in amplifier to observe the atmospheric carbon dioxide (CO2) column absorption near wavelength 1.57 mu m in solar occultation mode. This combination facilitates miniaturization of laser heterodyne radiometer. Combined with our developed retrieval algorithm, the atmospheric carbon dioxide column concentration is measured to be 413.7 = 1.9 ppm, in agreement with GOSAT satellite observation results. This system offers high spectral signal-to-noise ratio of similar to 333 for the zeroth harmonic (Of) normalized second harmonic (R2f) signal of CO2 transition (R22e), with a measurement averaging time of 8 s, which can be further improved by increasing averaging time in accordance to the Allan deviation analysis for the noise fluctuation. This demonstrates the feasibility of the system for atmospheric investigation and the potential of ground-based, airborne and spaceborne observations for the variation of the global greenhouse gases. (C) 2020 Elsevier B.V. All rights reserved.
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语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/64643]
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	H. Deng,M. X. Li,Y. B. He,Z. Y. Xu,L. Yao,B. Chen,C. G. Yang and R. F. Kan. Laser heterodyne spectroradiometer assisted by self-calibrated wavelength modulation spectroscopy for atmospheric CO2 column absorption measurements[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2020,230:6.
APA	H. Deng,M. X. Li,Y. B. He,Z. Y. Xu,L. Yao,B. Chen,C. G. Yang and R. F. Kan.(2020).Laser heterodyne spectroradiometer assisted by self-calibrated wavelength modulation spectroscopy for atmospheric CO2 column absorption measurements.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,230,6.
MLA	H. Deng,M. X. Li,Y. B. He,Z. Y. Xu,L. Yao,B. Chen,C. G. Yang and R. F. Kan."Laser heterodyne spectroradiometer assisted by self-calibrated wavelength modulation spectroscopy for atmospheric CO2 column absorption measurements".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 230(2020):6.