Direction finding using a linear three-element interferometer approach

Results are presented from the operation of a system employing a linear three-element antenna array to determine the angle of arrival of a radio signal in a low-angle terrestrial situation. Based on a system successfully employed in determining the direction in space of meteor echoes at elevated angles, accurate direction determination was obtained in three widely varied terrestrial environments. While such a system would be susceptible to strong multipath signals, and therefore unsuitable for congested cellular environments, there are applications, for example emergency beacon location, in which this does not present a significant problem.