基于CSG模型的SAR城区回波模拟

SAR Raw Data Simulation of Urban Scenes Based on CSG model

对城区的SAR回波仿真是一个比较困难的问题。在城区场景的SAR图像中,地面.墙壁结构、屋顶、屋脊、屋檐、地面是SAR图像中重要的散射源。利用构造几何模型对城区建筑进行几何建模,将场景分解为大量三维立体网格,计算网格内主要散射源的散射系数。利用网格位置及其散射系数,在SAR空间几何关系下仿真了城区场景回波。成像结果表明该方法的有效性。

It＇ s difficult to simulate SAR echo of urban area. In SAR images of urban scene, ground-wall structure, roof, eaves, rid- ges and ground are important scattering sources. The geometry model of buildings is constructed Using CSG model. Then the scene is de- composed into a large mount of 3D grid. The scattering coefficient of major scatter in these grid is calculated. SAR raw data is simulated using the grids position and their scattering coefficients in the geometry relationship of SAR. The imaging result shows the method is valid.