天津新一代天气雷达(CINRAD/SA)定标对比分析

Comparative Analysis of Tianjin CINRAD/SA Radar Echo Intensity Calibration

回波强度定标是保障CINRAD/SA回波强度测量精度的关键技术,将直接影响雷达定量估测降水产品的可靠性。应用天津CINRAD/SA多普勒天气雷达定标前后的反射率强度资料,对天津雷达反射率强度进行对比分析。结果表明:定标后天津雷达基本反射率因子强度有所增强,尤其是高仰角反射率增强更加明显;对于积层混合降水回波,定标后天津多普勒天气雷达组合反射率因子强度有所提高。

CINRAD echo intensity calibration is the key technology to improve the reliability of observational data,which can lead to large measurement error.Based on the reflectivity data before and after calibration of Tianjin CINRAD/SA radar,this paper contrasts reflectivity data.It shows that the intensity of Tianjin radar reflectivity was increased after calibration,especially at 2.4 ° and 3.4 °.The CR was also increased for stratiform mixed precipitation echo.