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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 6 — Feb. 20, 2004
  • pp: 1425–1434

Passive remote monitoring of chemical vapors by differential Fourier-transform infrared radiometry: results at a range of 1.5 km

Jean-Marc Thériault, Eldon Puckrin, François Bouffard, and Bernhard Déry  »View Author Affiliations


Applied Optics, Vol. 43, Issue 6, pp. 1425-1434 (2004)
http://dx.doi.org/10.1364/AO.43.001425


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Abstract

A method for the passive remote monitoring of chemical vapors by differential Fourier-transform infrared radiometry is presented to determine the characteristics of a chemical vapor plume from a stack located at a distance of more than 1 km from the sensor. This measurement technique is based on the use of a double-beam Fourier-transform infrared spectrometer that is optimized for optical subtraction. A description of the interferometer (compact atmospheric sounding interferometer) is given along with the algorithm (GASEM) that has been developed for the on-line detection, identification, and quantification of chemical vapor plumes. The detection method is described with a particular emphasis placed on its monitoring capabilities. The analysis focuses on the experimental results obtained at a recent open-air experiment for vapor plume mixtures of dimethyl methyl phosphonate and SF6 probed at a distance of 1.5 km. The accuracy of a simplified plume radiance model implemented in the detection algorithm is specifically addressed. The measurement technique has been successfully used to detect and identify low, medium, and high concentrations of vapor mixtures but appears to have limited quantification capabilities in its present form.

© 2004 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.1030) Spectroscopy : Absorption
(300.2140) Spectroscopy : Emission

History
Original Manuscript: July 22, 2003
Revised Manuscript: November 13, 2003
Published: February 20, 2004

Citation
Jean-Marc Thériault, Eldon Puckrin, François Bouffard, and Bernhard Déry, "Passive remote monitoring of chemical vapors by differential Fourier-transform infrared radiometry: results at a range of 1.5 km," Appl. Opt. 43, 1425-1434 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-6-1425

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