Improved theoretical formula for the relationship between rain attenuation and depolarisation

Abstract

The theoretical formula for the relationship between rain attenuation and depolarisation proposed by Nowland et al. is improved by calculating the forward-scattering amplitudes of the Pruppacher–Pitter type raindrops at 22 frequencies from 10 to 40 GHz. The dependence of the relation on frequency and on raindrop-size distributions is discussed.