Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 18
Articles | Volume 19, issue 18
https://doi.org/10.5194/amt-19-6125-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-6125-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 18
Research article
 | 
25 Sep 2026
Research article |  | 25 Sep 2026

Employing smoothness of the time series of sky radiances measured in the solar aureole for cloud screening

Alexander Sinyuk, Thomas F. Eck, Ilya Slutsker, Jasper Lewis, Petar Grigorov, Alexander Smirnov, Joel S. Schafer, Mikhail Sorokin, Elena Lind, and Pawan Gupta

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Short summary
The new technique for the clouds screening of aerosol optical depth is presented. It employs measurements of the sky radiances at smallest scattering angle to detect cirrus clouds which otherwise are difficult to detect by other methods. The method employs the smoothness of the time series of measurements throughout a day as a criterion for cloud-free conditions.  Sharp spikes in the time series are detected and associated with clouds.
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