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Proceedings Paper

Characterization of aerosol-containing chemical simulant clouds using a sensitive, thermal infrared imaging spectrometer
Author(s): Jeffrey L. Hall; Francis M. D'Amico; Steven J. Kolodzey; Jun Qian; Mark L. Polak; Karl Westerberg; Clement S. Chang
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Paper Abstract

A sensitive, ground-based thermal imaging spectrometer was deployed at the Army's Dugway Proving Ground to remotely monitor explosively released chemical-warfare-agent-simulant clouds from stand-off ranges of a few kilometers. The sensor has 128 spectral bands covering the 7.6 to 13.5 micron region. The measured cloud spectra clearly showed scattering of high-elevation-angle sky radiance by liquid aerosols or dust in the clouds: we present arguments that show why the scattering is most likely due to dust. This observation has significant implications for early detection of dust-laden chemical clouds. On one hand, detection algorithms must properly account for the scattered radiation component, which would include out-of-scene radiation components as well as a dust signature; on the other hand, this scattering gives rise to an enhanced "delta-T" for detection by a ground-based sensor.

Paper Details

Date Published: 3 June 2011
PDF: 10 pages
Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 801816 (3 June 2011); doi: 10.1117/12.884238
Show Author Affiliations
Jeffrey L. Hall, The Aerospace Corp. (United States)
Francis M. D'Amico, Joint Project NBC Contamination Avoidance, Aberdeen Proving Ground (United States)
Steven J. Kolodzey, Joint Project NBC Contamination Avoidance, Aberdeen Proving Ground (United States)
Jun Qian, The Aerospace Corp. (United States)
Mark L. Polak, The Aerospace Corp. (United States)
Karl Westerberg, The Aerospace Corp. (United States)
Clement S. Chang, The Aerospace Corp. (United States)


Published in SPIE Proceedings Vol. 8018:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
Augustus W. Fountain; Patrick J. Gardner, Editor(s)

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