GridRad - Three-Dimensional Gridded NEXRAD WSR-88D Radar Data

The GridRad data set consists of radar reflectivity data and radar coverage information from 125 U.S. NEXRAD WSR-88D radars merged onto a regular, three-dimensional, longitude-latitude-altitude grid at hourly analysis intervals. Each analysis uses all available radar azimuth scans within a specified time window centered on the analysis time. The size of the time window is given in the files as a global attribute. The data include weighted average radar reflectivity from multiple observations, averaging weights, number of azimuth scans (elevation angles) observing each volume, and the number of azimuth scans (elevation angles) with echo in each volume. Following conventional nomenclature, the NEXRAD volume scan files are referred to as Level 2 data, while this gridded data are referred to as Level 3 data. Additional information is available at GridRad.org [http://GridRad.org].

GridRad数据集包含源自125部美国下一代天气雷达（NEXRAD WSR-88D）的雷达反射率数据与雷达覆盖范围信息，这些数据被融合至规则的三维经纬度-高度网格中，分析间隔为逐时。每次分析会采用以分析时刻为中心的指定时间窗口内的所有可用雷达方位扫描数据。时间窗口的大小以全局属性的形式存储在数据文件中。该数据集包含多观测值的加权平均雷达反射率、平均权重、观测每个体扫的方位扫描（仰角）数量，以及每个体扫中存在回波的方位扫描（仰角）数量。按照常规命名规范，NEXRAD的体扫文件被称为Level 2数据，而本网格数据则被称为Level 3数据。更多信息可访问GridRad.org [http://GridRad.org]。

搜集汇总

背景与挑战

背景概述

GridRad数据集提供了美国125个NEXRAD WSR-88D雷达的三维网格化反射率数据，时间跨度为1995年至2017年，覆盖美国大部分地区。数据集包含每小时的分析结果，适用于气象研究和应用。