一种用于雷达模拟器的RCS时间谱模型

目标特性中的反射截面积是影响模拟器回波质量的关键因素之一。在以往的雷达模拟器中，RCS起伏量多数采用符合分布的统计模型方法，此方法依据分布模型产生一组随机数，虽然可以快速产生RCS值，但没有反映真实的RCS变化情况。根据目标周围的电磁场分布特性计算RCS的方法，模型复杂，计算耗时，难以达到模拟器实时的要求。文中探讨一种RCS的时间谱模型，它依据模拟器前端所产生的航迹数据，经过目标坐标系与雷达坐标系的变换，即可得到RCS随时间起伏的模型。该方法由于利用了模拟器的航迹数据，使模拟器的系统性更加明显，具有一定的可信度。同时，其计算量较小，完全满足模拟器实时计算的需要。经过仿真实验和“防空兵雷达虚拟空情保障系统”的应用，证明方法确实可行。

RCS Time Spectrum Model of Radar Simulator

The RCS glint in target characteristic is one of the key to affect echo of simulator. In former radar simulator, the RCS glint mostly adopted matches the distribute model method that produced a set of stochastic dates by distribute the model. This method can quickly produce the RCS value, but the value did not really reflect RCS variety. The method of RCS by electromagnetic distribute characteristic is quite complex, so the time of computing RCS value is too long to satisfy real time need of simulator. This paper discusses a method of time spectrum model. This method computes RCS value according to the transform of coordinate which is computed by track date of radar simulator. Because of making use of the track data of the radar simulator, this method makes the system of the radar simulator been obvious and RCS value is certain credibility. At the same time, its calculation deal is so smaller that satisfies the simulator real time need. The simulation test and application of The Air Defense Radar Virtual Air Situation Support System show that the method is feasible.