Comparison of approximation and rigorous solution of electromagnetic scattering from nonspherical drops

The numerical analysis of RCS calculations for ellipsoidal drops and Pruppacher-Pitter drops by using spherical drops and dipole scattering approximations are considered. The results are compared with the data of exact solution of the diffraction problem of electromagnetic scattering on such drops by using the method of moments for horizontal and vertical polarization of an incident field at wavelengths λ =0.8 cm, 3.2 cm, 5.5 cm and 10 cm. Also the polynomial approximation of rigorous results is proposed and the expansion coefficients are found. This allows using of the given data for calculation of scattering characteristics in the case of a polydisperse medium of nonspherical particles.