CAJ | 학술논문

运用基于图像特征和基于回波信号这两种 SAR 图像仿真方法，对海面舰船进行 SAR 成像仿真。根据仿真参数和得到的仿真图像，对比两种方法的优缺点。将基于海浪谱的双尺度动态海面模型和其上舰船3D 模型组合，构成海面舰船三维复合模型，并运用小面单元模型，通过射线追踪法(SBR)处理面元之间的遮挡阴影问题，结合物理光学法(PO)来计算面元的散射截面，然后分别基于图像特征和基于回波信号进行 SAR 图像仿真。得到的仿真图像能较直观地反映两种仿真方法的优缺点。
운용기우도상특정화기우회파신호저량충 SAR 도상방진방법，대해면함선진행 SAR 성상방진。근거방진삼수화득도적방진도상，대비량충방법적우결점。장기우해랑보적쌍척도동태해면모형화기상함선3D 모형조합，구성해면함선삼유복합모형，병운용소면단원모형，통과사선추종법(SBR)처리면원지간적차당음영문제，결합물리광학법(PO)래계산면원적산사절면，연후분별기우도상특정화기우회파신호진행 SAR 도상방진。득도적방진도상능교직관지반영량충방진방법적우결점。
Two methods are used to make SAR imaging simulation of ships and sea background in this paper:one is image characteristic simulation,the other is echo signal simulation.Their advantages and disadvantages are com-pared based on the parameters and simulation images.The two-scale model of the dynamic sea surface based on the wave spectrum is combined with the 3D ship model to form a composite model.The facet model is used.The shooting and bouncing ray(SBR)is used to deal with the shadow problem between facets.The physical optics method(PO)is used to calculate the radar cross section(RCS),then the image characteristic simulation method and the echo signal simulation method are used to simulate the SAR images.The simulation images obtained can directly reflect the advantages and disadvantages of the two simulation methods.