抄録
Meteorological disasters are caused by the severe weather phenomena like tornadoes or heavy rains. Weather radar is helpful to observe those phenomena. The conventional radar, which has about 500m spatial resolution and about 5 minutes temporal resolution, is not able to catch the detailed cloud growths and movements spatially or temporally. The PAR developed by our research group, which has 100m spatial resolution, can scan over the whole sky within the range of 30km every 10 seconds or within the range of 60km every 30 seconds by applying Digital Beam Forming (DBF). This paper discusses about the evaluation on the observation accuracy of PAR by comparing with other radars and a disdrometer. At first, PAR's reflectivities are compared with reflectivities derived from a disdrometer for the calibration. PAR reflectivities are highly correlated with disdromter reflectivities. Next, PAR reflectivities are compared with those of other radars. In this comparison, PAR reflectivities are also highly correlated with those of other radars. Therefore, it appears that PAR can observe precipitation accurately in high temporal resolution.
