https://hdl.handle.net/21.12132/3.72fb657cb20449fa 1.0 https://instrumentdb.out.ocp.fmi.fi/instrument/72fb657c-b204-49fa-aad5-eb59a51cbad1 NASA RD-80 National Aeronautics and Space Administration 027ka1x80 Distromet Ltd Distromet RD-80 disdrometer https://vocabulary.actris.nilu.no/actris_vocab/disdrometer drop size distribution 2020-03-03