摘要
移动式双偏振雷达在冰雹外场观测时位置的变化、雷达信号本身的涨落以及降水系统的演变等原因会造成测量参量产生较大脉动,使用小雨法对其差分反射率因子(Z DR)进行了系统误差标定。同时将各参量奇异值剔除后,当信噪比SNR≥10 dB时,雷达测量的各偏振参量值可信。分析了3、5、7、9、11点平滑处理沿径向分布廓线,认为本雷达采用7点平滑处理,既考虑了参量脉动性的减小,也避免丢失真实信息。
The change of the position of the mobile dual-polarization radar in the hail field observation,the fluctuation of the radar signal itself and the evolution of the precipitation system will cause the phenomenon that the measured parameters produce a large pulse.The system error calibration was carried out by light rain method.At the same time,when SNR is greater than or equal to 10 dB,the polarization parameters of radar are credible.The radial distribution profile of 3-point,5-point,7-point,9-point and 11-point is analyzed,and it is considered that 7-point smoothing is adopted in this radar,which not only takes into account the reduction of parametric pulsation,but also avoids the loss of real information.
作者
李玮
唐辟如
李皓
LI Wei;TANG Piru;LI Hao(Guizhou Province Weather Modification office,Guiyang 550081,China)
出处
《中低纬山地气象》
2021年第3期111-116,共6页
Mid-low Latitude Mountain Meteorology
