GPM GROUND VALIDATION NEXRAD LEVEL II KDMX IFLOODS

The GPM Ground Validation Next Generation Weather Radar (NEXRAD) Level II IFloodS datasets were collected from four sites (see Table 1) from March 29, 2013 to June 18, 2013 for the GPM Ground Validation Iowa Flood Studies (IFloodS) field campaign in central-northeastern Iowa. Officially, the IFloodS campaign ran from May 1 to June 15, 2013 but the NEXRAD data was collected prior to the start, allowing for the wider period of record. There are currently 160 Weather Surveillance Radar-1988 Doppler (WSR-88D) or NEXRAD sites throughout the United States and select overseas locations. The resulting data includes the base data (Level-II) and the derived products (Level-III). These Level-II datasets include three meteorological base data quantities: reflectivity, mean radial velocity, and spectrum width. The GPM Ground Validation NEXRAD Level II IFloodS data files are in a custom binary format; the visualization and decoding of the data requires specialized software. Browse imagery is available in PNG file format.

GPM地面验证NEXRAD Level II IFloodS数据集系从四个站点（见表1）于2013年3月29日至2013年6月18日收集，旨在支持中部东北部爱荷华州GPM地面验证爱荷华洪水研究（IFloodS）野外考察。官方而言，IFloodS考察活动自2013年5月1日至6月15日进行，但NEXRAD数据收集则在活动启动之前，从而拓宽了记录周期。目前，美国境内及选定海外地区共有160个Weather Surveillance Radar-1988多普勒（WSR-88D）或NEXRAD站点。所得数据包括基础数据（Level-II）和派生产品（Level-III）。这些Level-II数据集包含三项气象基础数据量：反射率、平均径向速度和频谱宽度。GPM地面验证NEXRAD Level II IFloodS数据文件采用定制二进制格式；数据的可视化和解码需借助专业软件。PNG文件格式的浏览图像亦可供查阅。