By using the radar equation developed by the authors, the differences in the probe results obtained in different forms of azimuthal integration and different processing methods of gridding with the dual digital processing system of the same weather radar are theoretically simulated. Some major conclusions are reached as follows. As compared with the non-azimuthal integration, the 1/2 and 3/4 exponential weighted azimuthal integration makes the precipitation echo intensity, the reflectivity factor and the pr...