Airborne midwave and longwave infrared hyperspectral imaging of gases

Marc-André Gagnon; Pierre Tremblay; Simon Savary; Marc Duval; Vincent Farley; Éric Guyot; Martin Chamberland

doi:10.1117/12.2064616

17 October 2014 Airborne midwave and longwave infrared hyperspectral imaging of gases

Marc-André Gagnon, Pierre Tremblay, Simon Savary, Marc Duval, Vincent Farley, Éric Guyot, Martin Chamberland

Proceedings Volume 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII; 92420O (2014) https://doi.org/10.1117/12.2064616
Event: SPIE Remote Sensing, 2014, Amsterdam, Netherlands

Abstract

Characterization of gas clouds are challenging situations to address due to the large and uneven distribution of these fast moving entities. Whether gas characterization is carried out for gas leaks surveys or environmental monitoring purposes, explosives and/or toxic chemicals are often involved. In such situations, airborne measurements present distinct advantages over ground based-techniques since large areas can be covered efficiently from a safe distance. In order to illustrate the potential of airborne thermal infrared hyperspectral imaging for gas cloud characterization, measurements were carried out above smokestacks and a ground-based gas release experiment. Quantitative airborne chemical images of carbon monoxide (CO) and ethylene (C2H4) were obtained from measurements carried out using a midwave (MWIR, 3-5 m) and a longwave (LWIR, 8-12 m) airborne infrared hyperspectral sensor respectively. Scattering effects were observed in the MWIR experiments on smokestacks as a result of water condensation upon rapid cool down of the hot emission gases. Airborne measurements were carried out using both mapping and targeting acquisition modes. The later provides unique time-dependent information such as the gas cloud direction and velocity.

Citation Download Citation

Marc-André Gagnon, Pierre Tremblay, Simon Savary, Marc Duval, Vincent Farley, Éric Guyot, and Martin Chamberland "Airborne midwave and longwave infrared hyperspectral imaging of gases", Proc. SPIE 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII, 92420O (17 October 2014); https://doi.org/10.1117/12.2064616

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