https://hdl.handle.net/21.12132/3.5c5d0a39d2cd403d 1.0 https://instrumentdb.out.ocp.fmi.fi/instrument/5c5d0a39-d2cd-403d-a8d1-080c0d151cd3 NUIG CMH 15k University of Galway 03bea9k73 G. Lufft Mess- und Regeltechnik GmbH Lufft CHM 15k https://vocabulary.actris.nilu.no/actris_vocab/LufftCHM15k lidar ceilometer https://vocabulary.actris.nilu.no/actris_vocab/lidarceilometer attenuated backscatter coefficient 2008-05-01 CHM190159