Drop by drop backscattered signal of a 50 × 50 × 50 m3 volume: A numerical experiment

Due to the fact that the radar wave length is much smaller than the size of a rainfall “patch”, it appears that, in agreement with the theory, we retrieve an exponential distribution for potential measures on horizontal reflectivity. Much thinner dispersion is noticed for differential reflectivity. We show that a simple ballistic assumption for drop velocities does not enable the reproduction of radar observations, and turbulence should be taken into account. Finally the sensitivity of these outputs to the various model parameters is quantified.