飞机尾流X波段雷达散射特性的实验研究  

Experimental Study of X-Band Radar Scattering Characteristics of Aircraft Wake Vortices

作　　者：李军[1] 王涛[1] 李文臣[1] 刘忠训[1] 王雪松[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《雷达科学与技术》2009年第6期406-410,共5页Radar Science and Technology

基　　金：武器装备探索研究项目(No.7130620)

摘　　要：利用X波段新型多普勒天气雷达,针对起飞阶段的某型号运输机进行了飞机尾流探测实验。在显著偏离垂直入射方向的观测条件下,实验获得了尾流散射的中频回波数据。文中介绍了实验概况和数据处理流程,处理并分析了实验数据,获得了尾流散射的时间-多普勒速度谱和雷达散射截面(RCS)估计结果,在此基础上研究了尾流的雷达目标特性。结果表明,尾流具有多根时变谱线,各谱线的位置、强度近似呈对称分布;在距离雷达1.4 km处,该型号运输机尾流的RCS约为-90^-80 dBsm。By using a new type of X-hand Doppler weather radar, experiments are performed for detec tion of the wake vortices of a certain type of transport aircraft shortly after the aircraft＇s takeoff. Intermediate-frequency echoes are obtained from an observation angle remarkably departing from normal incidence. A survey of the experiments and flow chart of data processing are provided. The experimental data are processed and analyzed. The time-Doppler spectrum and the radar cross section（RCS） of the wake vortices are estimated. The radar scattering characteristics of the wake vortices are researched. The results show that the wake vortices have several time-varying spectral lines, whose positions and intensities are approximately symmetrically dis tributed. At 1.4 km away from the radar, the radar cross section of the wake vortices is about-90--80 dBsm.

关 键 词：飞机尾流 电磁散射 雷达 实验 多普勒 

分 类 号：TN957.52[电子电信—信号与信息处理] V321.252[电子电信—信息与通信工程]