Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 21
Articles | Volume 19, issue 21
https://doi.org/10.5194/amt-19-6875-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-6875-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 21
Research article
 | 
30 Oct 2026
Research article |  | 30 Oct 2026

Total power calibration in FTIR emission spectroscopy for finite interferograms

Lukas Heizmann, Mathias Palm, Justus Notholt, and Matthias Buschmann

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Short summary
Fourier transform infrared emission spectroscopy measures the infrared radiation originating from the thermal emission of the atmosphere. The measured interferograms are transformed into spectra via Fourier transformation. The established method for calibration is strictly speaking only valid for infinitely long interferograms. We quantify the errors caused by this idealization in a case study.
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