Patent ID: 9653774
Date: 2017-05-16
CPC Classifications: G01S,H01Q

Claim:
1. A system for accurately finding a current azimuth of an antenna by non-magnetic means, comprising: i. a first GPS receiver located at a first position coinciding with an antenna; ii. a second GPS receiver located at a second position spaced by a minimal distance from said antenna and in an arbitrary direction with respect to said first GPS receiver; iii. rotatable optical means which is positioned adjacent to said antenna, said optical means configured to visually sight said second GPS receiver and being independently rotatable, with respect to said antenna, about a vertical axis mounted on a tower of said antenna from said initial direction to a second direction until said optical means points in the direction of said second GPS receiver; iv. a rotation sensor coupled to or included with said optical means and configured to measure an angle between an initial direction that is parallel to a current pointing direction of said antenna and said second rotated direction; and v. processing means configured to calculate, with respect to true north as derived from said first and second GPS receivers, a first azimuth to a line between said first position and said second position, and the current azimuth of said antenna by subtracting said angle from said first azimuth.