Articles | Volume 13, issue 9
https://doi.org/10.5194/amt-13-4715-2020
https://doi.org/10.5194/amt-13-4715-2020
Research article
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07 Sep 2020
Research article | Highlight paper |  | 07 Sep 2020

A compact QCL spectrometer for mobile, high-precision methane sensing aboard drones

Béla Tuzson, Manuel Graf, Jonas Ravelid, Philipp Scheidegger, André Kupferschmid, Herbert Looser, Randulph Paulo Morales, and Lukas Emmenegger

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Latest update: 16 Nov 2024
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Short summary
We describe a lightweight (2 kg) mid-IR laser spectrometer for airborne, in situ atmospheric methane (CH4) measurements. The instrument, based on an open-path circular multipass cell, provides fast response (1 Hz) and sub-parts-per-billion precision. It can easily be mounted on a drone, giving access to highly resolved 4D (spatial and temporal) data. The performance was assessed during field deployments involving artificial CH4 releases and vertical concentration gradients in the PBL.