Long Distance Surface Wave Propagation Over Realistic Terrains

Full-wave time domain simulation on very large terrains and complex media can help to solve communication channels or radar detection problem on wide frequency range but can cost very large resources. Specific terrain data is needed to generate the scene model which can also be computationally expensive. Depending on the frequency of interest, some terrain model such as forests may be simplified using equivalent models to reduce the resource cost. Finite Difference Time Domain scheme is used with the Moving Window technique to limit the computational domain following the wave front. The computation cost is significantly lower than the solving Maxwell equations over the whole domain. These three main points are developed in this paper, presenting challenges and solutions of the project which aims to build a software capable of time domain simulation of a surface wave over long distance through complex media.