Airborne midwave and longwave infrared hyperspectral imaging of gases

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

doi:10.1117/12.2067321

18 November 2014 Airborne midwave and longwave infrared hyperspectral imaging of gases

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

Proceedings Volume 9263, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications V; 926312 (2014) https://doi.org/10.1117/12.2067321
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

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 μm) and a longwave (LWIR, 8-12 μm) 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, and Martin Chamberland "Airborne midwave and longwave infrared hyperspectral imaging of gases", Proc. SPIE 9263, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications V, 926312 (18 November 2014); https://doi.org/10.1117/12.2067321

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