Overview of five unfiltered observing days of KSO Hα full-disk imaging as evaluated with the CLASS-q8-CONTR model. Panels a–e: derived image quality as a function of time. Examples across the series are given at the bottom. The first example shows a clear observation, while the subsequent examples show overexposure, strong cloud coverage, a contrail and partial cloud coverage. Panel a: a day of clear observing conditions with no quality degradations. Panel b: has generally high-quality conditions with a few overexposed images. Panel c: a varying cloud coverage leads to frequently changing quality scores throughout the day. Panel d: has generally high-quality conditions but a few images reveal degradation due to contrails. Panel e: a general quality decrease by clouds, while the quality further gradually decreases when denser clouds transition the disk. A video of panel e is available online (Movie 2).