由于在使用X波段雷达时,必须要对雷达反射率进行衰减订正,本文发展了X波段雷达和微波辐射计联合遥感技术对雷达反射率进行衰减订正的方法。并选用两个不同降水系统个例(积层混合云降水和层状云降水),分析了联合遥感方法的订正效果,结果表明,联合遥感方法可对雷达反射率进行有效的衰减订正,订正后雷达回波的空间结构、回波强度和路径分布较为合理,订正后雷达反射率因子平均值在两个个例中分别增加1.71 dBZ和0.84 dBZ,略小于双偏振方法订正后的结果。
The radar reflectivity must be corrected when using X-band radar.In this study we developed a combined attenuation correction method through using X-band radar and microwave radiometer.And we chose two different cases of precipitation systems, one is from convective-stratiform-mixed cloud and another is from stratiform cloud, to analyze the corrected results of the combined method.As a result, the corrected reflectivity by the combined method is very reasonable in spatial distribution, magnitude and path distribution, and the average of corrected reflectivity increased 1.71 dBZ and 0.84 dBZ respectively in the two tests, which was little smaller than the results of a dual-polarization attenuation correction method.
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