https://hdl.handle.net/21.12132/3.2d386110ecd24616 1.0 https://instrumentdb.out.ocp.fmi.fi/instrument/2d386110-ecd2-4616-ac0c-60e434637197 UB CL61 University of Bern 02k7v4d05 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 2026-02-24 X4326909