Accession Number : ADA325049
Title : Imaging of Moving Ground Vehicles.
Descriptive Note : Final rept. 7 Sep 95-6 Sep 96,
Corporate Author : MARK RESOURCES INC TORRANCE CA
Personal Author(s) : Rihaczek, A. W. ; Hershkowitz, S. J. ; Duong, T. V.
PDF Url : ADA325049
Report Date : SEP 1996
Pagination or Media Count : 128
Abstract : We demonstrate the processing steps necessary for the identification of moving ground vehicles with synthetic aperture radar (SAR). The variety of targets is so large and the vehicles can behave in so many different ways that only a highly adaptive algorithm can accommodate all the different conditions, and identification requires that use be made of the complex image. The yaw/pitch/roll/bounce/flex motion of a moving ground vehicle demands that different motion compensations be applied to different parts of the vehicle. The objective of motion compensation must be to generate an image with well compensated complex responses, not to produce a 'focused' image. The motion compensation must adaptively select imaging intervals for which this is possible. Vehicle motion can cause cross range positions of scatterers to be falsified. Thus, identification must rely primarily on their range positions, using enough crossrange resolution to allow accurate range measurements. With a deformable template procedure, measured scatterer positions can then be compared to predictions for candidate targets. We process data to demonstrate that these principles must be followed even in the benign case of slow vehicle motion on a Smooth road, and describe how the processing must be extended for more severe motion.
Descriptors : *SYNTHETIC APERTURE RADAR, *GROUND VEHICLES, *MOVING TARGET INDICATORS, ALGORITHMS, MEASUREMENT, ROLL, PITCH(MOTION), YAW, DEFORMATION, MOTION, ACCURACY, IMAGES, IDENTIFICATION SYSTEMS, TEMPLATES, ADAPTIVE SYSTEMS, COMPENSATION, INTERVALS.
Subject Categories : Surface Transportation and Equipment
Active & Passive Radar Detection & Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE