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Proceedings Paper

The effect of turbulent temperature fluctuations on vapor detection by ground-based passive infrared sensors at near horizon line of sight
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Paper Abstract

Passive infrared spectral sensors (7-14 um) measure brightness temperature along a line of sight, and from these measurements the presence of a vapor cloud is deduced. How important are atmospheric temperature fluctuations due to turbulence on the detection of vapors? We developed a stochastic simulation that uses the MODTRAN program to explore this question. We were surprised to find that although temperature brightness fluctuations are not insignificant compared to state-of-the-art sensor's noise (modeled as uncorrelated white noise) the effect on detection was very small because turbulence noise is spectrally correlated and thus its effect was largely removed with a regression algorithm. In this work we do not address the detection limit due to atmospheric interferences whose effect on detection limit may is severe.

Paper Details

Date Published: 27 October 2010
PDF: 10 pages
Proc. SPIE 7827, Remote Sensing of Clouds and the Atmosphere XV, 78270R (27 October 2010); doi: 10.1117/12.864128
Show Author Affiliations
Avishai Ben-David, U.S. Army Edgewood Chemical Biological Ctr. (United States)
Agustin Ifarraguerri, Science Applications International Corp. (United States)

Published in SPIE Proceedings Vol. 7827:
Remote Sensing of Clouds and the Atmosphere XV
Richard H. Picard; Klaus Schäfer; Adolfo Comeron; Michiel van Weele, Editor(s)

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