Local transparent boundary condition applied to the modeling of tropospheric ducting propagation

Abstract

An efficient numerical scheme to simulate tropospheric ducting propagation (TDP) is presented in this paper. This scheme solves the parabolic equation (PE) approximation in conjunction with the finite‐element method (FEM) and the local transparent boundary condition (LTBC). It is shown that a simple LTBC can be effectively used to account for the radiation in TDP, instead of the recently published nonlocal transparent boundary condition (NTBC), which is much more complex and consumes more computer time. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 343–346, 1999.

Parabolic Equation Modeling of Propagation over Terrain Using Digital Elevation Model

“…So far, the three commonly used algorithms of PE are SSFT, the finite-difference method (FDM) [5], and the finite-element method (FEM) [6], among which SSFT is an analytical method, while FDM and FEM are numerical methods. In terms of the problem of propagation in the troposphere under large-scene, long-distance, and low-elevation angle conditions, SSFT has many advantages over FDM and FEM, such as good in stability, small in error, and high in efficiency.…”