New Velocity Dealiasing of Doppler Radar with the Interactive Method

Doppler weather radar plays an important role for detecting and forecasting severe weather, it could probe atmosphere with high spatial and temporal resolutions. Because Doppler velocity ambiguity disturbs target recognition and data application, a lot of work focuses on velocity dealiasing. This research tries to study a new interactive method for unfolding the velocity ambiguity with the computer graphic function, which is quite different from the previous unfolding methods. The positive and negative areas of radial velocity are distinguished by zero velocity line in the radial velocity field which is easy to do with human´s experience, then unfold process has been made in the selected area. This method needs not any extrapolation and hypothesis, could deal with one and more times velocity ambiguity. The result shows this unfold method is convenient and fast, and corrected information accuracy is ensured.