Articles | Volume 11, issue 10
https://doi.org/10.5194/amt-11-5549-2018
https://doi.org/10.5194/amt-11-5549-2018
Research article
 | 
12 Oct 2018
Research article |  | 12 Oct 2018

Cloud fraction determined by thermal infrared and visible all-sky cameras

Christine Aebi, Julian Gröbner, and Niklaus Kämpfer

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Latest update: 19 Apr 2024
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Short summary
A newly developed hemispherical thermal infrared cloud camera (IRCCAM) is presented. The IRCCAM allows automatic cloud detection during the day and at night-time. The cloud fraction determined from the IRCCAM is compared with the cloud fraction determined from other instruments over a time period of 2 years. The IRCCAM has an agreement of +/- 2 oktas cloud fraction in 90 % of the data compared to other instruments. There are no significant differences between seasons or different times of day.