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On the basis of brief introduction of Shanghai TWP3 wind profiler radar system, the radar detection performance is assessed from the three aspects of operation situation, wind data acquisition rate, and product data analysis. Through the statistical analysis of the average height wind data acquisition rate in different layers throughout the year and monthly data, it is concluded that TWP3 wind profiler radar can get a higher data acquisition rate under 3 km; the detection capability in the boundary layer was much higher than that in the top layer; and summer data acquisition rate was significantly higher than in winter. A weak precipitation detection process is analyzed by using the signal to noise ratio (SNR), vertical velocity, and refractive index structure constant (C2n) and other data. The secondary products can clearly reflect the start and end time of the precipitation process, and the significantly increased detection height of about 2 km during precipitation. Assessment results indicate that TWP3 boundary layer wind profiler radar has a lower failure rate and better detection performance, reliable and applicable product data.