https://hdl.handle.net/21.12132/3.81960b9207554267 1.0 https://instrumentdb.out.ocp.fmi.fi/instrument/81960b92-0755-4267-89aa-fcc8b0091eb1 FMI CL61-A Finnish Meteorological Institute 05hppb561 Vaisala Oyj 05yhgzh28 Vaisala CL61 https://vocabulary.actris.nilu.no/actris_vocab/VaisalaCL61 depolarisation lidar ceilometer https://vocabulary.actris.nilu.no/actris_vocab/depolarisationlidarceilometer volume linear depolarisation ratio attenuated backscatter coefficient 2021-03-30 S4940002