Theoretical studies of differential propagation phase shift in meteorological polarization diversity radars at centimeter wavelengths

Explores an extension of the theory used by Jameson (1985) to centimeter wavelengths, and presents a detailed examination of its model dependencies at C-band. Firstly, the relationship between the differential propagation phase shift, ΔΦ and the rainrate, R is investigated with respect to various parameters such as water temperature, raindrop shape and dropsize distribution (DSD) form for centimeter wavelengths. A noniterative gate-by-gate algorithm for extracting ΔΦ from C-band circular depolarisation ratio (CDR) radar data, in which the effects of differential backscattering phase shift are taken into account is presented. By means of modelling attenuation and differential attention with differential propagation phase shift, propagation effects on CDR radar data can thus be reduced by correction processes. Some numerical results obtained from simulating modelled storms are also presented. These show that differential propagation phase shift can be applied to obtain improved measurements of precipitation