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A weather radar data processing module for storm analysis

机译:用于暴风雨分析的天气雷达数据处理模块

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摘要

A pre- and post-processing weather radar data module was developed in the Matlab suite of software with GIS data exchange abilities for storm event analysis. During pre-processing, each radar sweep is converted from spherical to Cartesian coordinates in the desired temporal and spatial resolution. The module's functionality in post processing includes radar data display, geo-referencing over GIS maps, data filtering with the Wiener filter and single or multiple sweep processing. The user can perform individual storm cell detection and tracking, resulting in the storm's average velocity and track length. The tested methods are modifications of the LoG (Laplacian of the Gaussian) blob detection method and a Brownian particle trajectory linking algorithm. Radar reflectivity factor (Z) data can be referenced over predefined rainfall (R) gauges in order to determine the radar Z-R equation parameters. The user can also produce spatially distributed precipitation estimates by using standard Z-R equations from the literature. The module's functionality is demonstrated using data from a rainfall event captured by the NSA Souda Bay C-Band radar during a storm in October 2006. Results show that the Rosenfeld Tropical Z-R equation is the one that gives a satisfactory description of the spatial and temporal precipitation distribution of the investigated event.
机译:在Matlab软件套件中开发了预处理和后处理天气雷达数据模块,该模块具有GIS数据交换功能,可用于风暴事件分析。在预处理期间,每次雷达扫描都会以所需的时间和空间分辨率从球面坐标转换为笛卡尔坐标。该模块在后处理中的功能包括雷达数据显示,GIS地图上的地理参考,使用维纳滤波器的数据过滤以及单次或多次扫描处理。用户可以执行单独的风暴单元检测和跟踪,从而获得风暴的平均速度和航迹长度。测试的方法是对LoG(高斯的拉普拉斯)斑点检测方法和布朗粒子轨迹链接算法的修改。可以在预定义的降雨(R)量表上引用雷达反射率(Z)数据,以确定雷达Z-R方程参数。用户还可以通过使用文献中的标准Z-R方程来生成空间分布的降水估计。该模块的功能通过使用NSA苏打湾C波段雷达在2006年10月的一次暴风雨中捕获的降雨事件的数据进行了演示。结果表明,Rosenfeld Tropical ZR方程可以令人满意地描述时空降水。调查事件的分布。

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