Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 21
Articles | Volume 18, issue 21
https://doi.org/10.5194/amt-18-6513-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-6513-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 21
Research article
 | Highlight paper
 | 
13 Nov 2025
Research article | Highlight paper |  | 13 Nov 2025

IASI global radiometric uncertainty budget

Dimitrios Kilymis, Yannick Kangah, Laura Le Barbier, Elsa Jacquette, Xavier Lenot, Jérémie Ansart, Mathilde Faillot, Jean-Christophe Calvel, Gilles Codou, and Olivier Vandermarcq

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This study presents a comprehensive and quantitative evaluation of the global radiometric uncertainty budget for the IASI satellite instruments, which are key components of long-term atmospheric monitoring. The work represents a timely and significant advance in ensuring the traceability and stability of satellite-based climate observations.
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Short summary
This study establishes the global radiometric uncertainty budget of the Infrared Atmospheric Sounder Interferometer (IASI) instruments onboard Eumetsat first generation MetOp satellites. Major contributions to the budget arise from the correction of the analog non-linearity, the black body characterization, the scan mirror reflectivity and the background radiance instability. The estimated uncertainty remains relatively stable throughout the lifetime of the instruments.
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