Abstract
SAR (Synthetic Aperture Radar) is used to detect the complex ground target, which can obtain the image of the military target. There is a great difference between the SAR image and the traditional optical image, and SAR image responses the distribution characteristics of the ground target microwave scattering which produces great challenges in the interpretation of the SAR image. A simulator method based on electromagnetic scattering characteristics of the target was presented to obtain SAR image of targets on the ground. According to the turntable imaging model, the method that classification interpolation of digital elevation model of the real ground simulated was used to build the ground structure. And the target’s electromagnetic scattering and the RCS (Radar Cross-Section) were computed by the graphical electromagnetic computing (GRECO) method. The accelerating ray-tracing method was applied to compute the interaction between the target and ground. A SAR simulation imaging system was built to simulate the SAR image of a tank target placed in the ground. The simulation result indicated that the simulated image fits the scattering characteristics of the actual object and it could provide recognition template for SAR image interpolation with the ground SAR image simulation based on electromagnetic scattering characteristics.
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