风廓线雷达探测模式分析与设计

通过对风廓线雷达回波信号原理和回波特点的介绍,分析了雷达信号与数据处理流程,根据雷达工作参数的取值对探测性能的影响,提出了风廓线雷达工作参数选择的顺序和原则:(1)根据高度分辨率和高度探测范围的要求确定脉冲宽度和脉冲重复周期;(2)根据对最大不模糊多普勒速度大小的分析,结合已选定的脉冲重复周期,确定相干平均次数;(3)根据测速精度的分析要求,结合已确定的最大不模糊多普勒速度值,确定谱分析时的快速傅里叶变换点数;(4)根据时间分辨率的要求,确定谱平均数。最后,设计了对流层风廓线雷达探测模式一览表,并介绍了实际应用效果。

Analysis and Design of Wind Profiler Detecting Modes

Based on the principle of the clear air echo from the wind profiler, the signal and data processing flow of the profiler is analysed. Aceording to the influence of the work parameters of the profiler on the detection, selecting order and rules of the work parameters are given. 1) getting the pulse width and the pulse repetition time (PRT) based on the height resolution and range. 2) deciding the coherent averages by the PRT and the Nyquist velocity. 3) selecting the spectral points according to the precision of the velocity. 4) giving the spectral averages by the time resolution. In the end, the detecting modes of the troposphere wind profiler are devised, and the real detecting effect is investigated using the modes.