Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 9
Articles | Volume 19, issue 9
https://doi.org/10.5194/amt-19-3137-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-3137-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 9
Research article
 | 
13 May 2026
Research article |  | 13 May 2026

Ground-based comparison of Sentinel-5P TROPOMI cloud fraction products using calibration-informed low-cost multi-spectral sensors

Wolfgang Schneider

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Short summary
A low-cost ground station using commercial infrared sensors compared Sentinel-5P cloud fraction retrievals in pre-Alpine Bavaria, Germany. Agreement was strong (R = 0.879, N = 27 after quality filtering). The method functions as a three-state classifier (clear / partly cloudy / overcast). Citizen science sensor networks offer a scalable approach to screen satellite data quality in regions lacking professional monitoring.
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