Accession Number:

ADA234051

Title:

Propagation of RF Signals through Structured Ionization: The General Model

Descriptive Note:

Technical rept. 1 Jan-31 Dec 1989

Corporate Author:

MISSION RESEARCH CORP SANTA BARBARA CA

Personal Author(s):

Report Date:

1991-03-01

Pagination or Media Count:

142.0

Abstract:

Design and evaluation of radio frequency RF systems that must operate through ionospheric disturbances requires an accurate channel model. Such a model can be used to construct realizations of the received signal for use in digital simulations of transionospheric communications links and radars or hardware channel simulators. This report presents a review of RF propagation through structured ionization, starting with Maxwells equations and ending with the two-position, two frequency, two-time mutual coherence function of the received signal. The derivation of the mutual coherence function requires a model for the temporal and spatial variations of the electron density fluctuations in the ionosphere. Under Taylors frozen in hypothesis, the electron density fluctuations are described as a rigid structure that drifts past the line-of-sight. In the fully turbulent case, the spatial and temporal fluctuations of the electron density are uncorrelated. Reality should lie somewhere between these two limiting models.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE