| US 7,551,138 B2 | ||
| Method and apparatus for signal tracking utilizing universal algorithm | ||
| Michael T. Grabbe, Wylie, Tex. (US) | ||
| Assigned to L3 Communications Integrated Systems, L.P., Greenville, Tex. (US) | ||
| Filed on Dec. 22, 2005, as Appl. No. 11/316,298. | ||
| Prior Publication US 2007/0159394 A1, Jul. 12, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G01S 3/02 (2006.01) | ||
| U.S. Cl. 342—465 [342/451; 342/461] | 24 Claims |
| 1. A method of determining a geolocation of a non-cooperative target, the method comprising:
acquiring with a first collector a first signal measurement corresponding to a signal emitted from an emitter on the target,
the first collector being capable of acquiring each and every one of a first angle of arrival, a first direction of arrival,
a first target range, and a first target position;
forming a first measurement matrix utilizing the first acquired signal measurement;
applying the measurement matrix to a recursive filter;
acquiring with a second collector a second signal measurement corresponding to a signal emitted from the emitter on the target,
the second collector being capable of acquiring each and every one of a range, a second target position, and a vernier angle;
forming a second measurement matrix utilizing the second acquired signal measurement; and
applying the second measurement matrix to the recursive filter to determine the geolocation of the target without receiving
or requiring a precise location or orientation of the target from a communication transmitted from the target.
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