Doppler radar VAD technique can draw the divergence of background wind fieldfrom the distribution profile of Doppler velocitv with azilnuth on a distance circle,But,the distribution of Doppler velocity of a distance circle is unintegral normally.

• Doppler雷达VAD技术可以从距离圈上的Doppler速度随方位角的分布廓线中提取背景风场的散度。