Abstract
Pludix is a raingage-disdrometer based on the analysis of an X-band Continuous Wave radar signal backscattered by hydrometeors. The Doppler shift of the individual falling particle, which is supposed to randomly cross the radar volume, is detected. The 2048 readings of the signal are inverted to generate a hydrometeor size distribution subdivided into 21 bands. Pludix operates integrating 60-sec. backscattered signal and so it provides a more detailed information with respect to the classical tipping bucket rain gage. Moreover it's possible to detect the actual rainfall rate as an indirect product.Since September I999 the instrument has been in operation aside with a tipping bucket and a weighting scale rain gauge downtown Bologna. More than 200 rainfall events have been detected and subgroup of 21 events has been investigated. The spectral intensity of the signal is analysed with different algorithms for both time variability and precipitation type.A network of Pludix seems to be the right tool for investigating the space variability of rain in addition to time variability.
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