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激光测风雷达通过多普勒频移来确定激光束视线方向上的大气风场的速度矢量。由这些测得的矢量可反演大气风场群速的速度矢量。文讨论利用单一激光多普勒风速仪系统 ,激光束采用圆锥扫描方式 ,在扫描圆锥的垂直截面上取四个正交点上的多普勒风速矢量。通过这四个矢量 ,利用空间解析几何的知识 ,最终推导出观测视场上风场的水平和垂直方向的矢量分量。
Laser radar winds through the Doppler shift to determine the direction of the laser beam in the direction of the atmospheric wind speed vector. From these measured vectors, the velocity vector of atmospheric wind field group velocity can be inverted. In this paper, a single laser Doppler anemometer system is used. The laser beam adopts the cone scanning method, and the Doppler velocity vector at four orthogonal points is taken from the vertical section of the scanning cone. Through these four vectors, the knowledge of spatial analytic geometry is used to derive the horizontal and vertical vector components of the wind field in the observed field of view.