论飞机尾流散射特性的度量方法

Measurement methods of wake vortice scattering characteristics

由于航空安全的推动,飞机尾流的雷达探测成为雷达技术领域的新兴前沿课题。作为一类极为特殊的时变、非均匀、分布式、弱散射介质目标,飞机尾流的散射特性极具理论研究价值,同时对尾流的雷达探测技术研究具有重要指导意义。在尾流散射特性研究领域,尾流散射能力的度量存在体散射率、线散射率和雷达散射截面(RCS)直接度量三种方法。然而,目前尚未见这三种度量方法的物理基础、特点、内在关系、相互转换关系的分析。对上述问题进行了讨论,为以后的飞机尾流电磁散射特性研究和工程应用提供参考。

Due to the urgent demands arising in civil aviation,the radar detection of wake vortics is becoming an increasingly important issue in the field of radar tech- nology. As a special time-varied, non-uniform, distributed, weak-scattering medium, not only does the study of the scattering characteristics of wake vortices deserve much attention in theoretical aspect, but also it plays an important role in the de- velopment of corresponding radar detection technology. Currently, there are generally three approaches to measure the scattering capability of wake vortices：volume reflectivity, line reflectivity and radar cross section（RCS）. However, the physical essences of these approaches, as well as their relationships and transformations, remain uninvestigated. This paper discusses the above-mentioned issues, and the find- ings could provide helps to further studies of wake vortices scattering characteristics and their applications.