A new type UV-visible DOAS system based on photodiode array (PDA)

Min Qin; Pinhua Xie; Jianguo Liu; Wenqing Liu; Wu Fang; Fan Lu; Ang Li; Ke Dou; Shisheng Liu; Qingnong Wei

doi:10.1117/12.619877

12 May 2005 A new type UV-visible DOAS system based on photodiode array (PDA)

Min Qin, Pinhua Xie, Jianguo Liu, Wenqing Liu, Wu Fang, Fan Lu, Ang Li, Ke Dou, Shisheng Liu, Qingnong Wei

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619877
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

DOAS technique provides a more representative picture of air quality and typical urban exposures over traditional point monitoring equipments it has been widely used for urban air quality monitoring in China. Most commercial DOAS instruments presently used for air quality monitoring adopt photomultiplier and scanning slit as detector which is called slotted disk (SD) detector. In contrast with the SD detector Photodiode Array can overcome the problem of scintillation noise caused by atmospheric turbulence and reduce photon noise. We report here a new type UV-visible DOAS system based on photodiode array. The properties of the system including offset dark current noise linearity of the detector and resolution stray light ofthe spectrometer are described. Field observations of a number of pollutants (e.g. S0₂, NO₂, 0₃ and HCHO) were performed in the urban area of Beijing City during August 2004. The measurement results show that the system fulfils automatic ambient air monitoring with high time resolution and sufficient sensitivity.

Citation Download Citation

Min Qin, Pinhua Xie, Jianguo Liu, Wenqing Liu, Wu Fang, Fan Lu, Ang Li, Ke Dou, Shisheng Liu, and Qingnong Wei "A new type UV-visible DOAS system based on photodiode array (PDA)", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619877

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