上海TWP3型边界层风廓线雷达探测性能评估

Detection Performance Assessment of Shanghai TWP3 Boundary Layer Wind profiler Radar

在简述上海TWP3型风廓线雷达系统的基础上,从雷达运行情况、风数据获取率和产品资料分析3方面对该型号雷达探测性能进行评估。通过统计分析不同高度层上平均测风数据全年和逐月的数据获取率,发现TWP3风廓线雷达在3km以下具有较高的数据获取率,对于边界层的探测能力要远高于高层,且夏季的数据获取率明显高于冬季。利用风廓线雷达提供的信号噪声比SNR、垂直速度和折射率结构常数C2N等资料分析了一次弱降水探测过程,二次产品可以清晰地反映降水的始末时间,且降水期间探测高度增高2km左右。评估结果表明TWP3型边界层风廓线雷达具有较低的故障率和较好的探测性能,产品资料具有可靠性和应用价值。

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 kin; 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~） 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.