Use of the Implicit-Finite-Difference Method to Implement the Parabolic Equation Model

Abstract

An effort to investigate alternate means to the split step algorithm for determining radar coverage in the troposphere at gigahertz (GHz) frequencies is presented. The theory of the implicit-finite-difference method is summarized and the boundary conditions described. Examples indicate that, for sufficiently high signal levels, the IFD method is adequate at 9.6 GHz. However, the method did not give correct results beyond 35 km for the standard-atmosphere case in which signal level are very low.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1991
Accession Number
ADA237437

Entities

People

  • C. H. Shellman

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Altitude
  • Atmospheres
  • Atmospheric Physics
  • Atmospheric Sciences
  • Boundaries
  • Equations
  • Frequency
  • Low Altitude
  • Meteorology
  • Oceans
  • Physics
  • Refractive Index
  • Standards
  • Technical Information Centers
  • Transmitters
  • Troposphere

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Radar Systems Engineering.