Bae Systems Information and Electronic Systems Integration Inc.

L-3 Communications Corporation

Donald Spencer

Dale Jancic

Christopher Rakowski

Steven Earnest Morin

Leonard Ruvinsky

Michael C Freeman

Arnold D Seifer

Mahmood F Khosravi

Robert B Lombardi

A target location device has a video camera, a range finder, a self location module and an inertial measurement unit. The device provides a video display including video output of the camera and an object marker such as a cross-hair overlayed on the video output for aiming the camera on a reference point or on a target in the video output. The range finder determines a distance from the device to the target. The self location module identifies the geographic location of the device. The inertial measurement unit includes at least one gyro for providing outputs corresponding to the location of the reference point and the target. Video stabilization may be use to allow accurate placement of the object marker on the target or reference point. Automatic range finder firing and gyroscope error compensation are also provided.

Target locating device and methods

Using in-phase and quadrature components of a received signal, spatial and temporal information is utilized to generate a maximum likelihood coefficient from the measured data to geolocate an emitter of unknown frequency. In one embodiment an iso-Doppler contour is generated having regions of high correlation to estimate location in which the maximum likelihood calculation uses two factors, one derived from a single aperture and one derived from bearing estimates, with the region of highest correlation corresponding to emitter location. Hypothesized in-phase and quadrature signals corresponding to an emitter location describe what the signals received at the aperture should be if the emitter is of a predetermined frequency and at a predetermined location, with these estimates used in the maximum likelihood algorithm.

Method and apparatus for passive geolocation using synthetic-aperture processing

An antenna and its associated components are consolidated in a small measurement box, and multiple tests are competed simultaneously, with a single vector network analyzer. This can be done by treating the 'Far Field' measurements (typically measured on antenna/RCS ranges) as another port of a larger passive network. After characterization of one ideal 'gold' unit (or a sample set of &#x201c;gold&#x201d; units), the S-parameters of subsequent units are measured in the same passive test box environment. The results of these subsequent tests are compared to the results of the &#x201c;gold unit's&#x201d; test, and if they are repeated to within some tolerance, electrical similarity can be proven.

Method and system for determining antenna characterization

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Merrimack, NH, United States of America

Donald Spencer