29 November 2016 Open path measurement of atmospheric pollutants using DOAS method
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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.
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Pavel P. Geiko, Sergey S. Smirnov, 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); doi: 10.1117/12.2248817; https://doi.org/10.1117/12.2248817
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