Patent ID: 7928841
Filing Date: 2011-04-19
Classification: G01S,G08B

Abstract:
1. A tracker system comprising: (a) a reference signal generator responsive to and phase-stabilized by a broadcast signal; (b) a transmitter that is phase-stabilized by the reference signal generator and transmits a forward signal that is phase-stabilized to the broadcast signal; (c) a receiver that is phase-stabilized by the reference signal generator and responsive to a return signal, which return signal is triggered by a signal from the transmitter; (d) a global positioning module to determine the location of the tracker system; and (e) a spatial position computer coupled to the receiver, the global positioning module and at least one of the reference signal generator and the transmitter, responsive to indicia of a phase relationship between the forward signal from the transmitter and the return signal and to the location of the tracker system determined by the global positioning module whereby the spatial position computer determines a spatial position of a source of the return signal.