为了拓展新型中间层-平流层-对流层(Mesosphere-Stratosphere-Troposphere,MST)雷达测风工作模式,提高测风数据的时间分辨力,基于全相关分析(Full Correlation Analysis,FCA)方法与大气散射模型,设计了一种应用于MST雷达的空分天线(Spaced-Antenna,SA)测风模式.通过大气散射模型结合雷达实际阵面分布与工作参数产生仿真时域信号,讨论了不同相关函数、相关函数拟合方法以及MST雷达不同天线尺度对雷达测风结果的影响.为验证测风模式的有效性,将信噪比(Signal to Noise Ratio,SNR)不同的测风结果与模型中风场真值进行比较.研究结果表明,新的测风模式仿真计算得到的风速、风向结果精度较高,符合雷达实际探测要求.
Research on Radar Atmospheric Target Detection Based on SA
For expanding detection model of the new Mesosphere-Stratosphere-Troposphere(MST)radar and improving time resolution of the wind profiler,a kind of Spaced-Antenna(SA)wind detection model for MST radar is designed based on Full Correlation Analysis(FCA)and atmospheric scattering model.Simulation time domain signals are generated by atmospheric backscattering model combined with actual radar antenna distribution and working parameters,and these simulation signals are used to discuss the effect of different correlation functions,correlation function fitting methods,and different antenna scales of MST radar on radar wind measurement results.In order to verify the validity of the wind measurement model,the wind estimation results of simulation signals with different Signal to Noise Ratio(SNR)are compared with true wind speed values used in the backscatter model.Results show that the wind speed and wind direction estimated by the new detection model are in good agreement with the true value of the model,which meets the radar detection requirements.
SA modeFCAatmospheric backscatter modelMST radarwind field measurement
万方数据
维普
