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ROSAR(Rotor—SAR)是一个设想中的以直升飞机的旋转天线为基础的合成孔径雷达,雷达的功能是给驾驶员提供高鉴别力的视觉目标检测和目标定位,如果天线装在直升机的某个部位,如旋翼桨叶的末端(见图1),则ROSAR对民用和军用直升飞机成象具有潜在的好处。它的两个主要潜在优点是成象视界为360°和不需要运载平台的前向速度。和基于天线的直线运动的SAR系统不同,ROSAR成象基于环形合成孔径。因此,成象过程就需要一个极坐标数据处理结构。ROSAR的原理不仅适用于直升机,也适应于带有旋转天线的其它雷达测绘系统中。
ROSAR (Rotor-SAR) is a conceived synthetic aperture radar based on a helicopter’s rotating antenna. The function of the radar is to provide the driver with high discriminating visual target detection and target positioning. If the antenna is mounted on a helicopter A site, such as the tip of a rotor blade (see Figure 1), has the potential for ROSAR imaging of civil and military helicopters. Its two main potential advantages are the imaging horizon of 360 ° and the forward speed without the need to carry the platform. Unlike SAR antenna systems based on linear motion, ROSAR imaging is based on a ring-shaped synthetic aperture. Therefore, the imaging process requires a polar coordinate data processing structure. The ROSAR principle applies not only to helicopters, but also to other radar surveying systems with rotating antennas.