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华南暴雨试验天气雷达数据处理及暴雨中尺度结构个例分析
HUAMEX RADAR DATA PROCESSINGMETHOD
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摘要: 文中描述了华南暴雨试验多普勒天气雷达数据的处理方法，建立了一套集图像显示、数据预处理及风场反演分析为一体的多普勒天气雷达的分析应用系统。该系统生成了三维正方形网格和经纬度网格的回波强度值，以及经噪声控制和速度扩展的径向速度风场，提交了华南暴雨试验雷达数据库。该文以1998年6月9日08：00(北京时) 探测数据为例，给出了华南暴雨试验区内4部多普勒天气雷达的反演雨强图和两部雷达的风场反演拼图，并进行了暴雨中尺度风场结构的初步分析。Abstract: A method of processing weather radar data of HUAMEX was presented, and an integration application system was established, including (1) converting raw data format into united format and verifying raw data, (2) producing radar 3-D square grid and latitude-longitude grid data, (3) processing radial velocity, and (4) retrieving rain and mosaic wind filed. 2-D wind field in a hail day was retrieved, and convergence field appearing before echo zone forming was discovered. When the echo moving into convergence field, it became hail. It reveals that hail can be predicted by retrieved wind. In HUAMEX, 3-D wind field from single Doppler was retrieved, and 3-D wind mosaic map was formed by three Doppler radar data, the applications potential for understanding and employing Doppler wind was exhibited.
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Key words:
- Doppler radar;
- Data processing;
- Wind retrieving
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表 1 华南暴雨试验天气雷达参数表
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