Evaluation of Attenuations for Melting Snow and the Melting Layer

Melting layer has been described with two melting particle models. The specific attenuation of melting snow, the average specific attenuation and the excess attenuation of the melting layer have been calculated by using two melting particle models and an approximate method in a frequency range of 1-1000 GHz for the precipitation rate below 12.5 mm/h. Numerical calculations have been performed with four drop-size distributions. The parameters a and b of the power law relation aRb for the average specific attenuation of the melting layer have been given in the frequency range.