山回波的PIA因子在3cm雷达波衰减订正中的应用  

Application of mountain return PIA to the attenuation correction of 3-cm weather radar data

作　　者：赵恒轩[1] 张赴建 

机构地区：[1]南京气象学院气象台,南京210044

出　　处：《南京气象学院学报》2000年第1期119-123,共5页Journal of Nanjing Institute of Meteorology

摘　　要：通过比较同一山体在晴雨两种天气条件下的回波反射率 ,确定在雷达与山体之间的降水造成山体回波的路径积分衰减因子 ( path- integrated attenuation factor) ,以此计算雷达与山体之间降水的真实反射率 ,从而把降水对 X( 3cm波长 )波段雷达波的衰减订正掉。Path integrated attenuation factor for a mountain return is determined by a comparison of the radar reflectivities of the mountain during precipitating between the radar and the mountain and the reflectivities from the same mountain when it is clear.Then ,the PIA factor is applied for the attenuation correction of radar echoes of the percipitation so that the real reflectivities of the precipitation are obtained.

关 键 词：PIA因子 路径积分衰减 雷达反射率 衰减订正 

分 类 号：P412.25[天文地球—大气科学及气象学]