Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 3
Articles | Volume 19, issue 3
https://doi.org/10.5194/amt-19-983-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-983-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 3
Research article
 | 
11 Feb 2026
Research article |  | 11 Feb 2026

Optimizing the precision of infrared measurements using the Eppley Laboratory, Inc. model PIR pyrgeometer

Joseph J. Michalsky, John A. Augustine, Emiel Hall, and Benjamin R. Sheffer

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Short summary
We examine four equations for calculating infrared radiation (3–50 mm) measured with an Eppley PIR (Precision Infrared Radiometer) pyrgeometer. These equations are used to transfer calibrations from our standards calibrated at the World Radiation Center in Davos, Switzerland, to our field PIR pyrgeometers. A clear choice in terms of the most precise method to follow emerges from this study. Further, we evaluate the stability of the Eppley PIR, necessary for long-term trend analysis.
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