Accession Number : ADD009266

Title :   Angle of Arrival Measurements for Two Unresolved Sources.

Descriptive Note : Patent Application,


Personal Author(s) : Cantrell,Ben H ; Gordon,William B ; Trunk,Gerard V

Report Date : 20 Feb 1982

Pagination or Media Count : 19

Abstract : This document discloses a method of estimating the angles of arrival theta 1 and theta 2 of two closely spaced radar targets of which one target may be the virtual image of the other target. The targets are illuminated with a radar beam of wavelength WL, and the resulting echos from the targets are received at three directive antennas whose apertures are coplanar and whose phase centers are colinear and spaced a distance D apart. The received echos are converted to complex numbers S1, S2 and S3 representing the magnitude and phase of the respective echos received by the three directive antennas. If the plane of symmetry of the two targets is known, the value of a parameter WD is determined. If the plane of symmetry of the two targets is not known, the values of WD and WB are determined by solving for WD and WB which minimize L.

Descriptors :   *Patent applications, *Radar tracking, *Direction finding, Range finding, Angle of arrival, Doppler radar, Radar beams, Radar targets, Antennas, Fortran, Targets, Frequency, Measurement

Subject Categories : Direction Finding
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE