Open path measurement of atmospheric pollutants using DOAS method

Pavel P. Geiko; Sergey S. Smirnov; Ignatii V. Samokhvalov

doi:10.1117/12.2248817

29 November 2016 Open path measurement of atmospheric pollutants using DOAS method

Pavel P. Geiko, Sergey S. Smirnov, Ignatii V. Samokhvalov

Proceedings Volume 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 100353N (2016) https://doi.org/10.1117/12.2248817
Event: XXII International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2016, Tomsk, Russian Federation

Abstract

An active differential optical absorption spectroscopy (DOAS) gas-analyzer was successfully tested. The DOAS system consisted of a coaxial telescope, a spectrometer, an analyzer and retroreflector. A high pressure 150-W Xe arc lamp and UV LEDs were employed as a light source. In order to record the spectra, a monochrometer with a grating and photodiode array was adopted. Gas analyzer spectral data bank includes more than 40 molecules absorbed in UV spectral region. The measured absorption spectra were evaluated by using a least-squares fit to determine the average mixing ratio of each species in the atmosphere. As a result of experiments time series of concentrations of gases polluting the atmosphere were trace measured. Minimally detected concentration is the unit of ppb on path length from 200 to 500 m at the time of accumulation up to 3 minute. The results of the field test measurements of pollutants in Tomsk are presented.

Citation Download Citation

Pavel P. Geiko, Sergey S. Smirnov, and Ignatii V. Samokhvalov "Open path measurement of atmospheric pollutants using DOAS method", Proc. SPIE 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 100353N (29 November 2016); https://doi.org/10.1117/12.2248817

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