GPM GROUND VALIDATION NEXRAD LEVEL II KDVN 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 地面验证项目下一代天气雷达（NEXRAD）二级 IFloodS 数据集于 2013 年 3 月 29 日至 6 月 18 日期间，为 GPM 地面验证项目爱荷华州洪水研究（IFloodS）野外调查在爱荷华州中东北部四个地点进行收集（详见表 1）。官方而言，IFloodS 调查活动自 2013 年 5 月 1 日至 6 月 15 日运行，但 NEXRAD 数据的收集在活动启动之前，从而使得记录周期得以延长。目前，全美及选定海外地区共有 160 个气象监视雷达-1988 多普勒（WSR-88D）或 NEXRAD 站点。所产生数据包括基本数据（二级）和派生产品（三级）。这些二级数据集包含三个气象基本数据量：反射率、平均径向速度和频谱宽度。GPM 地面验证项目 NEXRAD 二级 IFloodS 数据文件采用定制二进制格式；数据的可视化和解码需要专门的软件。浏览图像以 PNG 文件格式提供。