July 1969 | NTIA Technical Report ERL 120-ITS 84

Computer Routines for Synthesizing Ground Backscatter from Three-Dimensional Raysets

Judith J. Stephenson; T M Georges

Abstract: The report describes a series of computer routines for analyzing HF radio propagation in an arbitrary ionosphere - in particular, the echoes obtained in ionospherically propagated ground backscatter experiments. With the aid of a plotting routine that simulates backscatter intensity variations, the routines convert raypath data output from a three-dimensional ray-tracing program (Jones, 1966) into visual displays that simulate the appearance of various experimental backscatter display modes. Only the mechanics and sample outputs of the backscatter-simulation routines are given here; the theory and application to ionospheric problems are discussed in a paper by Georges and Stephenson (1969). Several supplementary programs, which concisely display information contained in a large number of raysets and which are helpful in interpreting ionospheric effects on backscatter, are also described in this report.

Keywords: backscatter; propagation modeling; ray tracing; ionospheric ground backscatter

To request a reprint of this report, contact:

Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572
LSegre@ntia.gov

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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