Comaparison of Disdrometer Performance During GPM-GV IFloodS Field Campaign

Nowadays, disdrometers of different type (i.e. optical, impact, video, laser and Doppler) are widely used worldwide to estimate rain drop size distribution (DSD) and rainfall rate. In the last few years they become more reliable, easy to operate with regular maintenance, and economically affordable, however disdrometers are still considered as a research tool and national weather services around the world do not use them as operational ground-based instrumentation. As a consequence disdrometer data are generally available through targeted field campaign or are managed by research Institutes or Universities. In the first case, a number of disdrometers, most of the time of different type and co-located, are dislocated in a specific area for the entire duration of the field campaign, generally few months, while in the second case it is possible to have a longer time series of disdrometer data (few years) although most of the time measurements from only one disdrometer are available.