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An approach to enhanced fidelity of airborne radar site-specific simulation

机译:一种增强机载雷达现场仿真保真度的方法

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Geographical information systems (GIS) have been the base for radar ground echo simulations for many years. Along with digital elevation model (DEM), present GIS contain characteristics of terrain. This paper proposes a computationally sensible simulation procedure to produce realistic radar terrain signatures in a form of raw data of airborne pulse Doppler radar. For backscattering simulation, the model of the ground is based on DEM and built with point-form backscattering objects. In addition to the usual DEM utilization for xyz coordinates and shadowed region calculation, we assume that each data point in GIS describes several scatterers in reality. Approaching the ground truth, we distribute individual scatterers with adjustable attributes to produce authentic response of areas such as sea, fields, forests, and built-up areas. This paper illustrates the approach through an airborne side-looking synthetic aperture radar (SAR) simulation. The results prove the enhanced fidelity with realistic SAR image features.
机译:多年来,地理信息系统(GIS)一直是雷达地面回波模拟的基础。与数字高程模型(DEM)一起,当前的GIS包含地形特征。本文提出了一种计算灵敏的仿真程序,以机载脉冲多普勒雷达的原始数据形式生成真实的雷达地形特征。对于反向散射仿真,地面模型基于DEM并使用点形反向散射对象构建。除了通常用于xyz坐标和阴影区域计算的DEM利用率外,我们还假定GIS中的每个数据点实际上都描述了多个散射体。接近地面真相,我们分配具有可调整属性的各个散射体,以产生对海洋,田野,森林和建筑区域等区域的真实响应。本文通过机载侧视合成孔径雷达(SAR)仿真说明了该方法。结果证明了逼真的SAR图像功能增强了保真度。

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