Abstract:Different cloud echo patterns were recognized using Doppler radar products for artificial precipitation in Hunan. It is found there are some obvious differences among convective cloud echoes during different development periods; duration of merging cloud is long and variability of echo character is insignificant. Integrated analyzing some parameters such as echo intensity, echo top height, water content, cloud top temperature, echo move speed and echo area, we obtain the ground artificial precipitation index and grade rule, then establish Doppler radar operation command system for ground artificial precipitation. All these results help carry out real time command,that is,release some parameters and command such as early warning information, operation azimuth, elevation angle, cannon amount etc.to each cannon site by the network combining GPS information and GIS geographic information of these sites.