Efficient Parabolic Equation Solution of Radiowave Propagation in an Inhomogeneous Atmosphere and Over Irregular Terrain: Formulation.

Abstract

Formulation is given for efficient parabolic equation solution of radiowave propagation in inhomogeneous atmosphere and over irregular terrain. Both standard and wide angle parabolic equation derivations are presented. Impedance boundary conditions are used to characterize the ground. A tropospheric boundary condition based on the exact solution of Schroedinger equation in a quarter plane is derived. To permit efficient modeling of the irregular boundary, the parabolic equation together with the boundary conditions is transformed into a numerically generated curvilinear coordinate system. Finally, formulation is presented for a finite difference solution using Crank-Nicolson implicit scheme.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1994
Accession Number
ADA288653

Entities

People

  • Ramakrishna Janaswamy

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Atmospheres
  • Boundaries
  • Boundary Value Problems
  • California
  • Coordinate Systems
  • Differential Equations
  • Equations
  • Helmholtz Equations
  • Impedance
  • Magnetic Fields
  • Partial Differential Equations
  • Refractive Index
  • Standards
  • Two Dimensional
  • United States
  • Wave Propagation
  • Wide Angles

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)