The optimal Z I relation is established with real time data and the multigrid method is used in solving the Euler equation. These considerations can improve data accuracy in a target region and save time as well.

• 由雷达反射率因子Z和地面降水强度I实时地获得最优Z－I关系，在求解欧拉方程时采用多重网格法，不仅可提高计算结果的精度，还可大大提高计算速度。