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Proceedings Paper

An on-line monitoring technique for trace gases in atmosphere based on differential optical absorption spectroscopy
Author(s): L. Q. Sun; K. X. Cheng; H. D. Yang; Q. S. He
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Paper Abstract

Differential optical absorption spectroscopy (DOAS) has become a widely used method to measure trace gases in the atmosphere. The concentrations of trace gases can be retrieved by fitting differential absorption spectra with standard differential absorption cross-section using the linear least-square method. The basic principle of DOAS is introduced. The construction of DOAS on-line monitoring system is designed and the retrieval method of trace gases concentration based on the principle of least-squares is discussed. The properties of DOAS system are tested by experiments. The advantages of DOAS system used in atmosphere quality monitoring are shown.

Paper Details

Date Published: 22 June 2013
PDF: 7 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87692Z (22 June 2013); doi: 10.1117/12.2021110
Show Author Affiliations
L. Q. Sun, Tsinghua Univ. (China)
K. X. Cheng, Tsinghua Univ. (China)
H. D. Yang, Tsinghua Univ. (China)
Q. S. He, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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