The characteristics of backscattering of radio waves from the drops in the clouds and precipitation are calculated using the algorithm for separating the variables for nonspherical (spheroidal) particles. In this case, it is assumed that the propagation direction of an incident TE- or TM-type plane wave is parallel or perpendicular to the symmetry axis of the model spheroid and the drop size is determined by the radius of an equivalent sphere, whose volume is equal to that of the spheroid. The validity of the proposed approach is checked on the test problems in the case where the drop form factor approaches unity. The applicability range of this algorithm is determined by comparing the results of numerical calculations with the Mie-theory scattering characteristics for spherical drops. It is shown that the algorithm for separating the variables should be used for drops larger than 1 mm, while the Mie algorithm can be used for drops smaller than 1 mm.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 64, Nos. 8–9, pp. 732–737, August–September 2021. Russian DOI: https://doi.org/10.52452/00213462_2021_64_08_732
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Sozaeva, L.T. Backscatter of Radio Waves by Spheroidal Rain Drops. Radiophys Quantum El 64, 659–664 (2022). https://doi.org/10.1007/s11141-022-10168-1
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DOI: https://doi.org/10.1007/s11141-022-10168-1