All-fibered coherent-differential absorption lidar at 1.645 µm for simultaneous methane and wind speed measurements

Simon Le Méhauté; Philippe Benoit; Nicolas Cézard; Didier Goular; Christophe Planchat; Matthieu Valla; Agnès Dolfi-Bouteyre; Xavier Watremez; Hervé Delbarre

doi:10.1117/12.2325554

9 October 2018 All-fibered coherent-differential absorption lidar at 1.645 μm for simultaneous methane and wind-speed measurements

Simon Le Méhauté, Philippe Benoit, Nicolas Cézard, Didier Goular, Christophe Planchat, Matthieu Valla, Agnès Dolfi-Bouteyre, Xavier Watremez, Hervé Delbarre

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Proceedings Volume 10791, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing XIV; 1079103 (2018) https://doi.org/10.1117/12.2325554
Event: SPIE Remote Sensing, 2018, Berlin, Germany

Abstract

Here we report on the development of a new coherent-DIAL system as well as first quantitative measurements of simultaneous gas mixing ratio and radial wind-speed with the instrument. Integrated measurement of atmospheric methane (CH₄) mixing ratio between the instrument and a hard-target located at 2:25 km has been conducted with a relative precision of nearly 20% in 17 s. The measurement procedure also gives information on integrated water vapor (H₂O) mixing ratio.

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Simon Le Méhauté, Philippe Benoit, Nicolas Cézard, Didier Goular, Christophe Planchat, Matthieu Valla, Agnès Dolfi-Bouteyre, Xavier Watremez, and Hervé Delbarre "All-fibered coherent-differential absorption lidar at 1.645 μm for simultaneous methane and wind-speed measurements", Proc. SPIE 10791, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing XIV, 1079103 (9 October 2018); https://doi.org/10.1117/12.2325554

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