Carl Barry Schaefer

US Patent:

41707745, Oct 9, 1979

Filed:

Jan 24, 1972

Appl. No.:

5/219775

Inventors:

Carl F. Schaefer - Westport CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

G01S 322
G01S 332
G01S 922

US Classification:

343 16M

Abstract:

A phase interferometer elevation angle measurement radar has its antennas tilted slightly relative to each other so as to detect differences in amplitude from ground return signals; the phase difference in signals (normally utilized as an indication of depression angle below boresight in an interferometer radar) is checked for a positive rate of change; it is then compared against amplitude differences and is accepted as valid for use in generating an elevation angle only if within prescribed limits thereof. This resolves ambiguity in phase which results from a wide spread of antennas with respect to the wavelength of the radar.