Upgrades for Efficient 3D Ionospheric Ray Tracing. Investigation of HF NVIS Effects,

Abstract

An earlier, three-dimensional (3D) ray-tracing program has been upgraded to include magnetic field effects, variable step sizes, improved propagation loss computation, and efficient homing and focusing computation algorithms. A combination of fourth-order Runge-Kutta and Adams methods, with error control, has been included. The program is applied to an investigation of high-frequency (HF) near-vertical-incidence-skywave (NVIS) effects. Model simulations of oblique ionograms are found to be consistent with experiment. Implications for NVIS geolocation are discussed.

Document Details

Document Type
Technical Report
Publication Date
May 03, 1990
Accession Number
ADP006296

Entities

People

  • Michael H. Reilly

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Computations
  • Frequency
  • Geolocation
  • Ionograms
  • Ionosphere
  • Magnetic Fields
  • Mathematical Analysis
  • Mathematics
  • Ray Tracing
  • Simulations
  • Simulators
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Space/Atmospheric Physics.