基于GRECO和射线追踪的介质散射特性计算

Computation of scatter characters of media target based on GRECO

在计算介质目标雷达散射特性的众多方法中,图形电磁学和射线追踪技术是计算高频区散射特性的两种有效方法.将两种方法有效地结合:首先通过OpenGL的光照模型和消隐,将介质目标的外形显示在屏幕上,并从缓存区中获取有效像素的颜色分量和位置信息,计算一次散射效应,然后将这些信息作为起始点信息,利用射线追踪技术计算多次散射效应,最后叠加一次、多次散射效应得到总散射特性.对圆柱、球的仿真结果证明了该方法的有效性和可行性.

Among all the methods of computing the scatter characters of radar targets, graphic electromagnetic method and ray tracing technique are two valid ways in high frequency. A valid method was presented to combine these two ways. First, with the help of illumination model and automatic hiding in OpenGL, the shape of media target was shown on screen. The color and position information of each pixel could be obtained from the buffers to compute the first scatter effect and then the position and normal vector information was taken as the start point to calculate the multi scatter effect by the ray tracing technique. At last, adding the two components leads to the total radar cross scatter. The simulation of cylinder and sphere proves the validity and effectiveness of this method.