By using the Doppler radar echo about Base Reflectivity ( R ), Storm Relative Vel Map ( SRM ), Vert Integrated Liquid ( VIL ) etc, a severe hail and wind weather process which occured in the south of North China on June 20,2004 is analyzed. 运用多普勒雷达的基本反射率(R)、风暴相对径向速度(SRM)、垂直积分液态含水量(VIL)等产品,分析了2004年6月20日华北南部罕见的冰雹大风天气过程。
In the simulation for target echo, First we analyse the mathematical expression for radar target echo on the base of radar equation. 在目标回波的仿真过程中,第一,以雷达方程为基础,对目标回波的数学表达式进行了深入分析。
The " belt " and " hook " shape of radar echo in the Base Reflectivity and Base Velocity products are the important characteristics of hail. 反射率因子和速度产品上的带状、钩状回波是冰雹天气过程的重要特征。
The descending inflow jet appears at the back of the bow echo on the map of Doppler radar base reflectivity fields, the larger the corresponding radial velocity is, and the more rapid the movement of radar echoes is, the larger the wind on the ground is. 多普勒雷达反射率因子图上弓状回波的后侧出现下沉入流急流,相应速度图上的速度值越大,回波移动速度越快,预示着所造成的地面风力也就越大。
Initial Stage Echo Modeling of Flying Spin-Stabilized Projectile with Slots on Base 底部刻槽旋转稳定弹丸的飞行初始段回波建模