“…The mixture consists of ice particles (impurities) and air (the main medium). The Maxwell-Garnet formula [Bojarsky, 1991], leading to the permittivity shows a good agreement with the experiment. Here, is the dielectric permittivity of a mixture, is the complex dielectric permittivity of the main medium, is the permittivity of the impurities of the volume part taken by the impurities.…”