Frequency characteristics of scattered power from two layers of random medium for application to detection of moisture in soil

In this paper, we have modelled a moist soil as two layers of random medium and evaluated the scattering cross sections of the medium by a dense medium radiative transfer equation (DMRT). A multiple scattering method has been used to estimate the coefficients of the DMRT. The characteristics of the scattering cross sections have been made clear by changing the polarization and frequency of the incident wave, the fractional volume of water, and the layer thickness. The results have shown that the polarization ratio frequency characteristics may be useful in detecting the large discontinuity of water content in deep soil with respect to the low moisture soil near the surface.