Japan Geoscience Union

In order to observe extreme weather such as localized heavy rainfall, tornado etc., we installed a Ku-band radar in Musashino-shi, Tokyo in 2011. Since the radar can create a 3D volume scan per minute, we expect that the data observed by the radar will contribute to understanding mechanisms of such phenomena.In our research, we defined a cell as an area whose reflectivity is ≥ 25dBZ, and a core as a reflectivity peak in the cell. The procedures of the cell/core detection are as follows: 1) conversion from rθ data to xyz data, 2) cell detection by binarization and labeling, and 3) core detection by method of steepest descent(ascent).In this presentation, results of an automatic cell/core detection algorithm will be shown.