The multi-path scattering characteristics in SAR image of cylinder cavity

In this paper, the shooting and bouncing ray (SBR) technique is employed to calculate the scattering of the cylinder cavity and by combining with range Doppler algorithms (RDA), the SAR image of the cylinder cavity is accurately obtained. Furthermore, the results reveal the effects of multi-path scattering mechanisms happened in the cavity, and also we give a detail explanation of the interference of multi-path scattering mechanisms on SAR imagery. And we point out for the first time that the cloud phenomenon in the down range is corresponding to focus mechanisms, which is totally different from that in the across range. Our present quantitative investigation provides guidelines for the SAR target recognition.