A new anti-noise dealiasing algorithm for weather radar velocities

Velocity aliasing is an important factor affecting the data quality of Doppler weather radar.A new anti-noise dcaliasing algorithm(AND) was proposed to solve the ambiguity.Based on the spatial continuity, the AND utilizes a lossless continuous noise suppression scheme.It consists of three steps: noise separation,fitting-curve dcaliasing, and noise restoration.Validation by 4 CINRAD-SA stations ×3 years of full ambiguous volume files (>40000) shows that:(1)AND was better than the WSR-88D dcaliasing algorithm.It had a correct rate 30% higher than that by the WSR-88D dcaliasing algorithm;(2) the correct rate of full ambiguous volume files were 89.4%,with the correct rate for typhoon,strong convection and weak convcction reached 92.9%.