Abstract: An apparatus and method for providing pointing information in accordance with a reference signal produced by at least one GPS satellite, including a pair of antenna elements for individually receiving the reference signal produced by at least one GPS satellite and for producing output signal in accordance with the received reference signal, the pair of antenna elements spaced from each other a fixed distance along a line to provide for a difference in phase between the reference signal as received at one antenna relative to the other antenna in accordance with the pointing angle of the pair of antennas along the line relative to the direction of the GPS satellite, means responsive to the output signals produced by the pair of antenna elements for producing a phase difference signal in accordance with the difference in phase between the reference signal as received at the one antenna relative to the other antenna, and means responsive to the phase difference signal produced by the last mentioned means for calc