CINRAD／SA雷达超折射回波抑制技术分析与应用

结合WSR-88D雷达地物杂波抑制原理和济南CINRAD/SA雷达的探测应用,分析了济南CINRAD/SA雷达超折射回波的时空分布特征及对基数据和导出产品的影响,介绍了如何根据雷达站的具体情况和气象条件的变化,进行CINRAD/SA雷达超折射回波抑制控制参数的设置。恰当的杂波抑制可显著改善基数据和下游产品质量,晴空模式可采用强等级杂波抑制,层状云降水区域受到超折射污染时,多普勒通道和监测通道可采用中等级抑制。对流单体受到超折射污染时,零速度线所在区域多普勒通道可采用中等级抑制,监测通道可采用强等级杂波抑制。

Analysis and Application of AP Clutter Suppression Technique for CINRAD/SA Radar

Based on the clutter suppression principles of WSR-88D and Jinan CINRAD/SA radar detection data,an analysis is made of the temporal and spatial distribution characteristics of Anomalous Propagation(AP) echoes and the impact of AP echoes on the base data estimates and the derived products.The adaptable parameter settings of clutter suppression,which includes editing Suppression Regions and Operator Sel Code and Channel Width,when weather conditions changed are recommended.It is indicated that the appropriate application of clutter suppression regions can significantly improve the quality of the base data and all downstream products.The high level suppression can be invoked in the clear-air mode. The medium level suppression can be invoked when stratiform cloud precipitation regions are contaminated.The medium level suppression in the Doppler channel and high level suppression in the Surveillance channel can be invoked when convective precipitation cells are contaminated.