Computation of target scattering over the half-space using a semi-analytic FDTD method

In this paper, a combination of analytic method and FDTD method is utilized to analyze transient scattering problem of targets over the half-space. This approach takes the consideration of the impact of the half-space without expanding the computational domain. The far radiation field can be calculated by the use of the combination of far field output and Fourier transform after the near filed of the closed surface containing the target is computed.