A layout of two-port DOAS system for investigation of atmospheric trace gases based on laboratory spectrograph

I. Bruchkouski; A. Borovski; A. Elokhov; O. Postylyakov

doi:10.1117/12.2248634

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29 November 2016 A layout of two-port DOAS system for investigation of atmospheric trace gases based on laboratory spectrograph

I. Bruchkouski, A. Borovski, A. Elokhov, O. Postylyakov

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Proceedings Volume 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 100353C (2016) https://doi.org/10.1117/12.2248634
Event: XXII International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2016, Tomsk, Russian Federation

Abstract

A method of Differential Optical Absorbtion Spectroscopy (DOAS) is widely used for monitoring of the atmospheric composition. A layout of an instrument for measuring atmospheric trace gases by DOAS method using scattered solar radiation was developed in A.M.Obukhov IAP RAS. The instrument layout is based on the lab Shamrock 303i spectrograph supplemented by 2-port radiation input system employing optical fiber. We assume that one optical port will be used for the zenith DOAS observation in the twilight and the daytime. It is a fast optical port which is required for the twilight low-light observations to investigate the NO2 vertical distribution in the stratosphere. Another telescopic optical port will be used as off-axis one directly or with a scanning MAX-DOAS unit. It will be used for investigation of gas contents and profiles in the low troposphere. In implementing the research objective, following tasks have been performed: radiation input system development, telescope-fiber and fiber-spectrograph optical coupling, CCD detector adjustment. Instrument temperature effects on the obtained spectra have been investigated and a thermo-stabilization unit was developed. Significant influence of the thermo-stabilization mode on the optical parameters of the instrument has been shown.

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I. Bruchkouski, A. Borovski, A. Elokhov, and O. Postylyakov "A layout of two-port DOAS system for investigation of atmospheric trace gases based on laboratory spectrograph", Proc. SPIE 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 100353C (29 November 2016); https://doi.org/10.1117/12.2248634

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