In order to analyze generating mechanism of microburst wind shear and wind speed estimation and echo spectrum under asymmetric wind field.The mathematical model of wind shear target echo is established by using mesh generation, combined with Doppler effect, the airborne radar wind shear signal processing algorithm is presented. The wind speed estimation and the rain echo power spectrum are simulated under following wind、partial wind、cross wind and against the wind. The simulation results showed that wind-speed alterations is suitable for the actual wind characteristic under following wind、partial wind、cross wind and against the wind.in different range gates. Asymmetric three-dimensional wind shear off the wind rain echo power spectrum distribution with asymmetric wind field in the radial velocity distribution The three-dimensional rain echo power spectrum distribution of wind shear is consistent with the radial velocity distribution under asymmetric field wind.
