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Proceedings Paper

Airborne target identification from low-crossrange-resolution ISAR imagery
Author(s): Bruce I. Hauss; Hiroshi H. Agravante; C. D. Eberhard; Karen M. Luebkemann; Thomas K. Samec; Thomas M. Wagner; August W. Rihaczek; Stephen J. Hershkowitz; R. L. Mitchell; E. Perahia; Donald Arnush; Sridhar Lakshmanan
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Paper Abstract

In a target-rich battlefield environment, a shipboard or an airborne radar must maintain situational awareness while tracking and identifying targets. Often the opportunity to dwell on each target long enough for confident identification via high resolution SAR/ISAR imaging will not exist, especially for those engagement geometries where the relative translational motion of the aircraft does not result in large rotation rates. Inadvertent aircraft tactical dither often generates enough target rotational during a brief imaging interval to allow the formation of an ISAR image with low crossrange resolution. We have developed an automated identification procedure that utilizes this resolution, along with high range resolution, to produce confident target identification. The advanced signal processing algorithms employed extract feature measurements from the complex ISAR image. including accurate measurements of the two-dimensional positions, amplitudes and range extents of the dominant target scatterers. A deformable template matching procedure is used to correlate these 'measured features' with those predicted for each candidate aircraft in a database generated from readily available diagrams, photographs and CAD models. After obtaining the optimal fit between the measured and predicted features for each candidate aircraft, the 'most likely' candidate is selected using a conventional Bayes classifier.

Paper Details

Date Published: 5 November 1996
PDF: 13 pages
Proc. SPIE 2845, Radar Processing, Technology, and Applications, (5 November 1996); doi: 10.1117/12.257215
Show Author Affiliations
Bruce I. Hauss, TRW, Inc. (United States)
Hiroshi H. Agravante, TRW, Inc. (United States)
C. D. Eberhard, TRW, Inc. (United States)
Karen M. Luebkemann, TRW, Inc. (United States)
Thomas K. Samec, TRW, Inc. (United States)
Thomas M. Wagner, TRW, Inc. (United States)
August W. Rihaczek, MARK Resources, Inc. (United States)
Stephen J. Hershkowitz, MARK Resources, Inc. (United States)
R. L. Mitchell, MARK Resources, Inc. (United States)
E. Perahia, MARK Resources, Inc. (United States)
Donald Arnush, Westwind Engineering, Inc. (United States)
Sridhar Lakshmanan, Univ. of Michigan/Dearborn (United States)

Published in SPIE Proceedings Vol. 2845:
Radar Processing, Technology, and Applications
William J. Miceli, Editor(s)

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