Accession Number : ADA132014

Title :   Techniques for Locating a Remote HF Transmitter from Single-Site Measurements.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Reilly,M H

PDF Url : ADA132014

Report Date : 11 Aug 1983

Pagination or Media Count : 24

Abstract : Techniques are developed for the location of a remote HF transmitter from single-site DF measurements on the incoming wavefront, coupled with ionospheric data. A simple method is detailed, which utilizes the Breit-Tuve and Martyn equivalent path theorems in a flat ionosphere approximation. It is shown to break down in this application only for high elevation angles and frequencies. Curved ionosphere generalizations of these theorems are developed to remove this breakdown. These generalizations are found to be remarkably accurate within the context of the neglect of magnetic field and non-spherical ionosphere effects, and are shown to applicable to the present problem.

Descriptors :   *Radio direction finders, *Position finding, *Range finding, *Ionospheric propagation, Ionospheric models, High frequency, Radio transmitters, Approximation(Mathematics), Radio receivers, Magnetic fields, Measurement

Subject Categories : Direction Finding
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE