Lockheed Martin Corporation

James N O'Sullivan

David R Twede

Yvette Marie Gordon

Charles E Stirman

Richard D McCoy

An optical assembly that includes at least one polarizing filter assembly and at least one sensor. The polarizing filter assembly is configured to receive electromagnetic radiation (EMR) emitted by a sun and transmit at least three different portions of EMR towards the at least one sensor, each portion filtered based on a different polarization orientation. A processor device is configured to receive sensor data generated by the at least one sensor in response to receipt of the at least three different portions of EMR, and determine an elevation angle of the sun with respect to a horizon from a geographic location of the optical assembly.

Polarization optical compass

An apparatus for and method of classifying a pattern including performing a wavelet transform. The invention finds particular application in the field of automatic target recognition, in which the pattern appears in a return radar signal, and the classification is used to classify a target.

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Orlando, FL, United States of America

James N O'Sullivan