Automatic Triple Interferometer Direction of Arrival Calculation Techniques

Abstract

This report presents the principles of operation of a non-display- oriented triple interferometer RDF system. Particular attention was paid to the ambiguity resolving portion of the system. It was found that phase ambiguity resolution (ambiguity resolution using the differential phase information from a smaller aperture interferometer system) has distinct advantages over direction ambiguity resolution (ambiguity resolution on the basis of knowledge of the approximate direction of arrival). The use of only the approximate azimuthal angle of arrival in the direction ambiguity resolving process appears to be insufficient. Futhermore it was found that the use of averaged values of the small interferometer differential phases appears to be more reliable than the use of instantaneous values of these phases. Finally, a new method of processing erroneous (ideally redundant) interferometer differential phase data was presented. It was found to be roughly equivalent, and yet much faster, than the old angle averaging method.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1972
Accession Number
AD0905026

Entities

People

  • Edward W. Ernst
  • Keith Eugene Hoover

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Materials and Manufacturing Processes
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Angle Of Arrival
  • Angle Of Incidence
  • Birds
  • Computer Programs
  • Direction Finding
  • Electronics
  • Geometry
  • Interferometers
  • Measurement
  • Military Research
  • Phase
  • Phase Measurement
  • Plastic Explosives
  • Test And Evaluation
  • Three Dimensional
  • Two Dimensional
  • Wave Interference

Readers

  • Calculus or Mathematical Analysis
  • Mathematics or Statistics
  • Radar Systems Engineering.