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Edgar A Hirzel, Douglas M Longyear Jr: Apparatus and method for determining aircraft position and velocity. Crane Co, Willian Brinks Olds Hofer Gilson & Lione, June 9, 1987: US04671650 (55 worldwide citation)

An apparatus and method for determining aircraft position and velocity is disclosed. The system includes two CCD sensors which take overlapping front and back radiant energy images of front and back overlapping areas of the earth's surface. A signal processing unit digitizers and deblurs the data th ...


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