Accession Number:

AD0905026

Title:

Automatic Triple Interferometer Direction of Arrival Calculation Techniques

Descriptive Note:

Technical rept. no. 36

Corporate Author:

ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Report Date:

1972-09-01

Pagination or Media Count:

224.0

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.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Direction Finding
  • Radiofrequency Wave Propagation
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE