Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 20
Articles | Volume 19, issue 20
https://doi.org/10.5194/amt-19-6643-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-6643-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 20
Research article
 | 
21 Oct 2026
Research article |  | 21 Oct 2026

Performance validation of the GHGSat methane constellation via controlled releases

Antoine Ramier, Hanford Deglint, Ariane Deslieres, Lia Formenti, Marianne Girard, Dylan Jervis, David J. Marshall, Jean-Philippe W. MacLean, Jason McKeever, Andrew McKell, Mathias Strupler, and Ewan Tarrant

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Latest update: 21 Oct 2026
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Short summary
We validated the GHGSat fleet against a large set of precisely measured emissions from 2021 to 2026 and built a model linking detection probability to leak rate, wind, retrieval noise, and resolution. In typical conditions the satellites detect a leak of about 100 kilograms per hour half the time and quantify its rate accurately. This sets a clear benchmark for how reliably satellites detect and measure methane leaks, which is essential for trustworthy emissions reporting and mitigation.
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