Gas plume characterization by passive remote sensing: application to CO2

Philippe J.L. Herve; A. Riguet; P. Caron; Olivier Jacquot

doi:10.1117/12.332659

15 December 1998 Gas plume characterization by passive remote sensing: application to CO₂

Philippe J.L. Herve, A. Riguet, P. Caron, Olivier Jacquot

Proceedings Volume 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques; (1998) https://doi.org/10.1117/12.332659
Event: Remote Sensing, 1998, Barcelona, Spain

Abstract

The remote sensing of CO₂ plumes or clouds is made possible by a passive optical method: we analyze the measured radiation to find the plume temperature and concentration which are supposed to be constant in the plume along the measuring optical path. The optical axis is issued from the background which is considered as air at room temperature; the radiation first goes across the CO₂ cloud along an optical path a few meters long then across air volume between the detection apparatus and the CO₂ cloud. We have to take into account the absorptivity of the atmosphere air and the emissivity of the background. Three measuring wavelengths are necessary: one gives us the background luminance, the two others are two CO₂ absorption bands. The selection of these wavelengths requires a spectroscopic simulation of the CO₂ and H₂O molecules; consequently we have to model the spectroscopic product of the CO₂ emissivity and air transmittance line by line. After identifying the measured luminances from a database we can find the temperature and then the concentration of the CO₂ plume. We are also perfecting too a two wavelengths imaging system using an IR camera to visualize a CO₂ plume over a very short period of time.

Citation Download Citation

Philippe J.L. Herve, A. Riguet, P. Caron, and Olivier Jacquot "Gas plume characterization by passive remote sensing: application to CO₂", Proc. SPIE 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques, (15 December 1998); https://doi.org/10.1117/12.332659

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