The range of applications in which remote detection of chemical compounds is used extends from monitoring of technological processes through diagnostics of industrial installation and environmental control up to military applications. The methods and the devices used for the passive detection of selected gases are presented. The change in the signal reaching the camera caused by the presence of gas was calculated. The successful detection can be achieved if the absorption (or emission) of a gas cloud, located between object (background) and the camera, causes signal change greater or equal to noise equivalent temperature difference (NETD) of the camera.
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CHAMBERLAND, M., LAGUEUX, P., TREMBLAY, P., SAVARY, S., GAGNON, M.-A., KASTEK, M., PIATKOWSKI, T., DULSKI, R. 2014. Standoff gas detection, identification and quantification with a thermal hyperspectral imager, WIT Transactions on Ecology and the Environment, Volume 181, Pages 671-682.