Octree based technique for fast analyzing shadowing relationship of complex target

In this paper, we have described an accurate and efficient shadowing recognition method based on octree data structure for efficiently judging the illuminated regions in electrically large objects. The physical optics method is used to calculate a bistatic RCS curve for target VFY-218. The theory of shadowing recognition is a hybrid method consists of traditional method and the octree data structure. This novel method is able to analyze the shadowing relationship precisely with less calculation time when compared with traditional method. Finally, numerical experiments and results show the accuracy and efficiency of this method.