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Proceedings Paper

Limit On Remote Fourier Transform Infrared (FTIR) Detection Of Trace Gases
Author(s): A. S. Zachor; B. Bartschi; M. Ahmadjian
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Paper Abstract

We studied the capability of a Fourier spectrometer system to remotely detect trace gases in localized clouds, e.g., stationary source effluents. Detection is based on the degree to which the observed IR spectral radiance contrast between the cloud and adjacent background is correlated with a computed reference spectrum. It is shown that trace gases can be reliably detected when spectral features are well below the noise level. The minimum detectable quantities (MDQ's) for various trace gases at one atmosphere total pressure are given. The MDQ's determine the combinations of gas column thickness and gas-background temperature difference that correspond to 95 percent detection probability and one percent false detection probability when an FTS system with modest-size foreoptics views the target through a path equivalent to approximately one air mass.

Paper Details

Date Published: 29 October 1981
PDF: 5 pages
Proc. SPIE 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy, (29 October 1981); doi: 10.1117/12.932172
Show Author Affiliations
A. S. Zachor, Atmospheric Radiation Consultants, Inc. (United States)
B. Bartschi, Utah State University (United States)
M. Ahmadjian, Air Force Geophysics Laboratory (United States)

Published in SPIE Proceedings Vol. 0289:
1981 Intl Conf on Fourier Transform Infrared Spectroscopy
Hajime Sakai, Editor(s)

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