Accession Number : ADA282648

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

Descriptive Note : Technical rept.,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEE RING

Personal Author(s) : Janaswamy, Ramakrishna

Report Date : JUN 1994

Pagination or Media Count : 37

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. Radiowave propagation, Parabolic equation, Finite differences

Descriptors :   *RADIO WAVES, *FINITE DIFFERENCE THEORY, BOUNDARIES, FORMULATIONS, IMPEDANCE, STANDARDS, TERRAIN, WIDE ANGLES, WAVE PROPAGATION, ANGLE OF ARRIVAL, SIGNAL PROCESSING, ATMOSPHERIC REFRACTION, FADING(ELECTROMAGNETIC WAVES), SCHRODINGER EQUATION, SOLUTIONS(GENERAL), TWO DIMENSIONAL.

Subject Categories : Radiofrequency Wave Propagation
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE