The technique involves processing the vertical profile in order to provide digital signals representative of the reflectivity provided by snow particles, in the z-direction. Integration is carried out in order to provide a signal which is representative of the average diameter and characteristic of the particles. The procedure for estimation of the characteristics of solid precipitation includes a stage of acquisition of a radar image comprising at least one vertical plane within a precipitation zone. This is followed by processing the vertical profile in order to provide digital signals representative of the reflectivity in the z-direction. Integration of the reflectivity signals is carried out in order to provide a signal which is representative of the average diameter of the particles, weighted by the mass of each particle. A further stage includes determination of the concentration of the solid particles with respect to the signals calculated in the previous stages.
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