"JOYCE is a unique site for cloud and precipitation observation. ... JOYCE aims at investigating the processes leading to cloud formation and cloud evolution. To this end, various instruments are currently set up at and around the Research Centre Jülich, in order to continuously monitor water vapour, clouds, and precipitation over many years. Only such observations will eventually make it possible to improve the prediction of clouds and precipitation by weather and climate models." JOYCE Website
Daily Quicklooks for Supersite JOYCE could be found here (Institute of Geophysics and Meteorology, University of Cologne. Attention: Not all shown instruments and variables are stored in the SAMD archive!