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There are many uncertainties in estimating ground rainfall intensity or amount of rainfall using radar. For example anomalous propagation echo, bright band, natural variability of rain drop size distribution (DSD), vertical profile of reflectivity, beam filling by rain drops, conversion of radar reflectivity to rain rate, and random error in reflectivity measurement can be listed (Doviak and Zrniic, 1984; Krajewski, 1993). The purpose of this paper is taking the first step to overcome the issues of natural variability of DSD and also vertical profile of reflectivity. In order to realize this, it is important to obtain both vertical profiles of DSD and radar reflective factor, and to use them in analyzing relations between structures of vertical profiles of DSD and characteristics of rainfall phenomena themselves, including the three-dimensional structures of radar reflectivity.

Utilization of Vertical Profile of DSD into Building up an Algorithm for Estimating Ground Rainfall Using Radar