High-resolution radar imagery has attracted increasing interest in recent years. As more radars are endowed with a high-resolution capability, target classification will become a regular system function. In order to classify aircraft using radar, one must have an understanding of how the radar imagery relates to physical aircraft. This paper illustrates the more important radar backscattering features on a typical fighter aircraft. Radar backscatter from an aircraft can occur through a variety of mechanisms. Although direct specular and diffractive mechanisms usually account for the majority of the scattering, indirect phenomena such as cavity scattering and creeping wave scattering are significant. This investigation finds that scattering from engine cavities is a particularly important radar backscatter mechanism for fighter aircraft. Radar data of an actual Mirage aircraft is collected from a target turntabel facility. This data is processed to obtain high-resolution range profiles (HRRP) and inverse synthetic aperture radar (ISAR) images, which indicate the prominent raar scatterers on the aircraft. The imagery is qualitatively examined, and its suitability for target classification is discussed.
High-resolution radar imagery of the Mirage III aircraft
Radarbild des Mirage-III-Flugzeugs
IEEE Transactions on Antennas and Propagation ; 42 , 9 ; 1356-1360
1994
5 Seiten, 6 Bilder, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
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