Ceilometer MOL 
German Weather Service (DWD), Meteorologisches Observatorium Lindenberg (MOL)
52.21N, 14.12E, 80 m asl
http://www.dwd.de/bvbw/generator/DWDWWW/Content/Forschung/FEHP/MOHP/IMG/default__ceilometer__molg,property=default.png