Measurements of a fully resolved contour of the carbon dioxide absorption line in a band at λ = 1.605 μm in the atmospheric column using high-resolution heterodyne spectroradiometry

• Published in: Quantum electronics (Woodbury, N.Y.) Vol. 49; no. 6; pp. 604 - 611
• Main Authors: Zenevich, S.G., Klimchuk, A.Yu, Semenov, V.M., Spiridonov, M.V., Rodin, A.V.
• Format: Journal Article
• Language: English
• Published: Bristol Kvantovaya Elektronika, Turpion Ltd and IOP Publishing 01.06.2019; IOP Publishing
• Subjects: ABSORPTION; ATMOSPHERES; ATOMIC AND MOLECULAR PHYSICS; CARBON DIOXIDE; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Contours; Greenhouse effect; Greenhouse gases; Ground stations; heterodyne spectroscopy; infrared range; LASER SPECTROSCOPY; LIGHT TRANSMISSION; Measurement techniques; remote sensing; Rotational spectra; ROTATIONAL STATES; Shape; Signal detection; SIGNALS; SPECTRA; Spectral resolution
• ISSN: 1063-7818; 1468-4799
• DOI: 10.1070/QEL16859

We consider the application of the heterodyne signal detection technique to measure the atmospheric transmission spectrum in the near-IR range, which makes it possible to measure for the first time the contour of a separate line of the vibrational - rotational CO2 band on the solar observation path with a high spectral resolution of λ/δλ = 108. Together with other characteristics of the instrument, this enables us to measure the carbon dioxide content in the atmospheric column with high accuracy. The experimental setup and measurement technique are described. The existing facilities for measuring the content of greenhouse gases in the atmosphere are compared, demonstrating the possibility of using the near-IR heterodyne spectroradiometry to develop a useful and competitive instrument that can be used in building new networks of ground stations to monitor greenhouse gases.