Patent ID: 7456788

Claim:
A method of determining a geolocation in signal tracking, the method comprising: acquiring a first set of geolocations corresponding to a signal and determined utilizing an algebraic closed form time-difference-of-arrival/time-difference-of-arrival algorithm; ascertaining a collector element range; producing a reduced first set of geolocations by excluding geolocations within the first set that exceed the collector element range; outputting a non ambiguous geolocation, if the reduced first set of geolocations is equal to one; performing the following steps if the reduced first set of geolocations is greater than one; acquiring a second set of geolocations corresponding to the signal and determined utilizing an algebraic close-form time-difference-of-arrival/frequency-difference-of-arrival algorithm; comparing the first set of geolocations and the second set of geolocations; producing a common set of geolocations by excluding geolocations that are not common to both the first set of geolocations and the second set of geolocations; outputting a non-ambiguous geolocation, if the common set of geolocations is equal to one; and averaging the remaining geolocations to produce a non-ambiguous geolocation, if the common set of geolocations is greater than one.