Electromagnetic wave propagation in a sea surface covered by foam using split-step fourier transform at wind sat frequencies.

Electromagnetic (EM) wave propagation through a physical model of foam-covered sea surface modelled as layers of randomly distributed air-bubbles coated with thin layer of sea water was investigated. Here, the matching potential of the split-step Fourier technique was explored by slicing the three-dimension foam structure into two-dimension layers and determine the vertical field profiles of the propagating E-field at successive range steps until the desired range is reached. The scatterer (foam layer) comprises of randomly distributed packed bubbles with estimated complex dielectric constant of sea foam which is a mixture of air coated with thin layer of sea water. It has internal and external radii and . The bubble size distribution follows a log-normal distribution pattern. We consider a cluster of N bubbles randomly packed closely such that there exists no overlap between any two adjacent bubbles. The bubbles are assumed to be spherical in shape and are placed in a finite domain in the form of a cube with dimensions = = The sea foam model is described by three regions embedded in inequality , the incident field must satisfy the Helmholtz equation. Results of EM field intensity through layers of sea foams as at selected WindSat frequencies were reported.