Computer simulation of radiowave attenuation in snowfalls at 138 and 247 GHz

In the present submission the computer simulation of the radiowave attenuation featuring in snowfalls at frequencies 138 and 247 GHz is carried out. The coupled dipole method is used as a working tool to treat the problem of the plane electromagnetic wave scattering by arbitrary geometry particles. In this method the particle of an arbitrary shape is replaced by an array of polarizable units or cells, interacting with each other through rescattering of the incident radiation. Each cell size is supposed to be small compared to the wavelength of the incident field and to any structural lengths of the particle. In original formulation of the coupled dipole method the Clausius-Mossotty polarizability (CMP) is used to express the cell polarizability. One of the main drawbacks of CMP is the discrepancy with optical theorem arising in calculation of the particle cross sections. To avoid this we choose the cell polarizability to be the single sphere polarizability ensuing from the low frequency limit to Mie theory.