Insights into the complicated SAR signature shapes induced by braking targets
Garren, David A.
MetadataShow full item record
This investigation considers the shapes of synthetic aperture radar (SAR) imagery signature smears that are caused by surface targets that perform braking maneuvers during the SAR collection time. It is known that such maneuvering target signatures can have a wide variety of two-dimensional (2D) shapes, as opposed to the simpler parabolic signatures that are induced by constant velocity targets. The current paper examines the theoretical properties of these 2D signature shapes for cases in which the specific parameters of the target braking maneuver temporal pro le are varied, including the rate at which the target decreases speed, the total amount of speed change, and the speed transition time within the SAR collection interval. Furthermore, the current investigation yields new insights regarding the complicated SAR signature shapes that are indicative of targets undergoing such braking maneuvers. This analysis reveals that the SAR signature for a given braking target is effectively a composite of three curved smear portions. One portion is a part of a parabola that is obtained from the constant-velocity target motion at the initial SAR collection time. Next, the second portion is that of a part of a different parabola that is generated from the final constant target velocity segment during the SAR collection interval. The third curved portion of the full moving target signature forms a connection between the parts of the two parabolas that are due to the initial and final constant velocity segments of the full target motion during the SAR measurement interval.
The article of record as published may be found at http://dx.doi.org/10.1117/12.2305100
Showing items related by title, author, creator and subject.
Garren, David Alan (IEEE, 2014);This paper examines the signature characteristics in spotlight synthetic aperture radar (SAR) image data for surface targets that are executing braking maneuvers during the SAR collection. This analysis considers the ...
Garren, David A. (2017);This paper examines the effects of the mean target speed on the synthetic aperture radar (SAR) imagery morphology of signatures induced by surface movers that are transitioning from a lower to higher speed during the ...
Garren, David Alan (IEEE, 2015);This paper investigates the signature characteristics in spotlight synthetic aperture radar (SAR) imagery for surface targets that are increasing speed during the collection interval. This study considers the broadside ...