A method for the prediction of the slant path rain attenuation statistics i
s proposed, based on the Weibull distribution for the representation of the
point rainfall rate statistics. The inhomogeneity of the rainfall medium i
s described by means of the spatial autocorrelation function. Numerical res
ults derived by using the proposed model have been compared with available
experimental data taken from the most recent ITU-R database. Comparison is
also made with another prediction method recommended by the International R
adio Consultative Committee and some useful conclusions are deduced. More p
articularly, the present method has been found to give improved results for
the higher percentages of time. On the other hand, the CCIR method is supe
rior for the lowest levels (0.003% and 0.001%).