摘要
对星载SAR(Synthetic Aperture Radar)地面场景的RCS(Radar Cross-section)仿真进行了研究,综合了现有的比较好的方法,给出了星载SAR地面场景RCS仿真的系统步骤和实现方法。该方法首先使用分形插值理论和小面单元模型来对实测的地面场景DEM数据进行处理,得到地面场景的空间模型,利用计算卫星偏近点角的算法及空间坐标变换理论来确定卫星与地面场景的空间关系模型,最后再利用地面散射特性模型结合地面场景模型和空间关系模型来计算地面场景的RCS数据阵。并利用实测的DEM数据进行了计算机仿真,得到了良好的实验结果。
Spaceborne SAR simulation of natural ground scene RCS methods are investigated in the paper. The diorama of natural ground scene is modeled from the DEM database on fractal theory and facet model. The geometric model of the natural ground scene and the satellite is modeled based on coordinate transition theory. The RCS matrix is given form the transition and the geometric model based on the clutter scattering characteristic model. The computer simulation is done for the real DEM data,and the results prove the effectiveness of the method.
出处
《现代电子技术》
2007年第7期15-18,共4页
Modern Electronics Technique
