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

Avishai Ben-David; Agustin Ifarraguerri

doi:10.1117/12.864128

27 October 2010 The effect of turbulent temperature fluctuations on vapor detection by ground-based passive infrared sensors at near horizon line of sight

Avishai Ben-David, Agustin Ifarraguerri

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Proceedings Volume 7827, Remote Sensing of Clouds and the Atmosphere XV; 78270R (2010) https://doi.org/10.1117/12.864128
Event: SPIE Remote Sensing, 2010, Toulouse, France

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.

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Avishai Ben-David and Agustin Ifarraguerri "The effect of turbulent temperature fluctuations on vapor detection by ground-based passive infrared sensors at near horizon line of sight", Proc. SPIE 7827, Remote Sensing of Clouds and the Atmosphere XV, 78270R (27 October 2010); https://doi.org/10.1117/12.864128

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KEYWORDS

Sensors

Turbulence

Clouds

Stochastic processes

Atmospheric sensing

Atmospheric modeling

Infrared sensors

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