预警机,又称空中指挥预警飞机,是为了克服雷达受到地球曲度限制的低高度目标搜索距离,同时减轻地形的干扰,将整套远程警戒雷达系统放置在飞机上,用于搜索、监视空中或海上目标,指挥并可引导己方飞机执行作战任务的飞机。自从美国成功地将大型搜索雷达装上飞机载到天空之后,空 Early warning aircraft, also known as air command early warning aircraft, were designed to overcome the low altitude target search distances that the radar is subject to Earth’s curvature and mitigate the terrain interference by placing a complete range of long-range alert radar systems on board aircraft for the search, surveillance of air or sea Target, command and guide one’s own aircraft to perform combat missions. Since the United States successfully mounted a large search radar onboard the sky, it was empty