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In characterizing ground surface clutter as relevant to forward-looking radar applications, a finite-difference time-domain (FDTD)-based solver is proposed to study dielectric surface scattering at low depression angles. The solver's effectiveness and accuracy are carefully evaluated for one-dimensional surfaces by comparing Monte Carlo scattering results to those from a surface integral equation...
A comparative study is carried out between two numerical simulation techniques—the surface integral equation (SIE) and the finite-difference time-domain (FDTD) methods—in order to characterize rough surface ground clutter relevant to forward-looking radar applications. Computational deficiencies in the SIE approach for analyzing scattering effects at grazing angles are outlined; motivations for the...
Propagation of radiowaves over complex irregular terrain profiles at near-grazing angles is studied using an efficient numerical solver. In supporting signal coverage prediction for such specialized systems in which the transmitter and receiver are in extreme proximity to the ground, available studies have been limited to the dependence upon site-specific, empirical-based models. The usefulness of...
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