基于地学研究的CINRAD/CB雷达回波显示与提取

Automatic recognition method based on geoscience research for precipitation echoes of CINRAD/CB

为准确显示天气雷达指定回波强度的回波区域,基于CINRAD/CB新一代天气雷达(简称CB雷达)的基数据,从地学角度提出一种CB雷达反射率因子回波的可视化方法,即将雷达基数据中的反射率因子数据采用地学中栅格数据格式进行显示。然后生成反射率因子图,结合风暴单体识别与跟踪算法(SCIT)中对风暴单体的识别模式,提出能够提取指定回波强度的雷达回波区域的方法。通过鄂尔多斯气象雷达站的CB雷达基数据提出方法并进行了验证。实验结果表明,提出的反射率因子图可视化方法可以显示雷达的反射率因子特征,针对反射率因子图提出的回波区域提取方法能够提取指定强度的回波区域。

To display the specified intensity weather radar echoes, a visualization method for CB radar＆#39;s reflectivity data was examined after brief introduction of the storage format of CINRAD/CB radar＆#39;s basic data. This method dis-plays the reflectivity data in CINRAD/CB radar＆#39;s basic data with a faster data format. Then the storm cell recogni-tion processes in storm cell identification and tracing algorithm（ SCIT） were discussed, and an method for extracting radar＆#39;s echoes was proposed. Finally, this method was verified with the weather radar＆#39;s basic data in Erdos. The results show that the displaying method can show the characters of CB radar＆#39;s reflectivity. For the reflectivity map created with this method, the extracting method can extract the specified intensity radar echoes.