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Measurement of the Angle of Arrival of Microwaves

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1 Author(s)
Sharpless, W.M. ; Bell Telephone Laboratories, Inc., Holmdel, N.J.

This paper describes a method of measuring the direction from which microwaves arrive at a given receiving site. Data which have been collected on two short optical paths using a wavelength of 3¼ centimeters are presented to illustrate the use of the method. Angles of arrival as large as ½ degree above the true angle of elevation have been observed in the vertical plane, while no variations greater than ±1/10 degree have been found in the horizontal plane. These results indicate that radar directions for low angles of elevation may be in error by several tenths of a degree during times when anomalous propagation conditions are present. Possible solutions to the problems introduced by variations in the angle of arrival are suggested.

Published in:

Proceedings of the IRE  (Volume:34 ,  Issue: 11 )