Study on the reliability and consistent of three radars in Changjiang-Huaihe river basin

The Doppler radar 3D (three-dimensional) mosaic data is an important tool to investigate the 3D structure of the severe weather, and improve the nowcasting accuracy. The data observed by the different radars should be checked the reliability and consistent before it was interpolated to the 3D data and was used on the weather analysis. The data in the vertical cross section along the equidistant line at the two radars is proposed to check the reliability and consistent of the different radars. The result shows that the reflectivity data of the different S-band radars is similar. The difference of the reflectivity data observed by the S-band and C-band radar is evidence. The radar data observed by the S-band radar is little strong than the one observed by the C-band radar. When observing the convective system, the difference is much obvious. The result is also show that the data observed by the different radars is reliability and consistent that it can be used on the radar 3D mosaic. The elevation and azimuth of every radial scan should be stored in the radar raw data that can improve the radar data position accuracy. It also suggests that the strict synchronous volume scan strategy in radar network can reduce the data difference. The network radars should run one volume scan in the same time span as soon as possible.