NOAA Climate Data Record (CDR) of NEXRAD Quantitative Precipitation Estimates (QPE) (Restricted)

NOAA NEXRAD Quantitative Precipitation Estimation (QPE) Climate Data Record (CDR) is created from the Radar Multi-Radar/Multi-Sensor (MRMS) Reanalysis to produce severe weather and precipitation products for improved decision-making capability to improve severe weather forecasts and warnings, hydrology, aviation, and numerical weather prediction. The data cover a time period from 2002-01-01 to 2011-12-31. NOAA's NEXRAD reanalysis consists of two primary components; (1) Severe weather and radar-reflectivity data generation, (2) Quantitative Precipitation Estimate (including associated precipitation variables and merged rain gauge and radar estimation). This document focuses on the second component of NOAA's NEXRAD reanalysis - the Quantitative Precipitation Estimate (QPE). The primary files generated within this data set are radar-only and radar- gauge (ROQPE, GCQPE, and MOS2D) merged precipitation products as well as ancillary information on precipitation type (PRATE and PFLAG) and radar quality (RQIND). The initial data set covers the time period from January 2002 - December 2011. Radar-only reflectivity, Gauge, Precipitation Flag, and Radar Quality Index for 5-minute data at 1km regular grid over CONUS. Radar only Radar-Gauge Quantitative Precipitation Estimates at hourly scale at 1km regular grid over CONUS. MRMS Quantitative Precipitation Estimation (QPE) uses the most advanced radar technologies and provides high-resolution information about precipitation types and amounts for the nation. The data are stored in netCDF version 4.0 files that include the necessary metadata and supplementary data fields. Data set provides information that can be useful for identification of various types of precipitation, estimation of radar reflectivity, recognition of storm patterns, forecasting technologies for rainfall estimation, and associating different phases of precipitation such as hail freezing rain and snow with radar observations.

美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）的NEXRAD定量降水估计（Quantitative Precipitation Estimation, QPE）气候数据记录（Climate Data Record, CDR），基于多雷达/多传感器（Multi-Radar/Multi-Sensor, MRMS）再分析数据构建，旨在生成强天气与降水相关产品，以强化强天气预报预警、水文、航空及数值天气预报领域的决策支撑能力。
该数据集覆盖时段为2002年1月1日至2011年12月31日。
NOAA的NEXRAD再分析包含两大核心组成部分：(1) 强天气与雷达反射率数据生成；(2) 定量降水估测（涵盖关联降水变量、雨量计与雷达融合估测方法）。
本数据集聚焦于NOAA NEXRAD再分析的第二部分——定量降水估计（QPE）。
本数据集生成的核心文件包括纯雷达、雷达-雨量计融合（ROQPE、GCQPE及MOS2D）降水产品，以及降水类型（PRATE与PFLAG）和雷达质量指标（RQIND）相关的辅助信息。
初始数据集覆盖时段为2002年1月至2011年12月。
覆盖美国本土（Continental United States, CONUS）的5分钟级纯雷达反射率、雨量计数据、降水标记及雷达质量指数，空间分辨率为1km规则网格。
覆盖美国本土的逐小时级纯雷达与雷达-雨量计融合定量降水估计数据，空间分辨率为1km规则网格。
MRMS定量降水估计（QPE）采用当前最先进的雷达技术，可为全美提供高分辨率的降水类型与降水量信息。
数据以netCDF 4.0格式（Network Common Data Form）存储，包含必要的元数据与辅助数据字段。
本数据集提供的信息可用于各类降水类型识别、雷达反射率估测、风暴形态识别、降水估测相关预报技术研发，以及将冰雹、冻雨、雪等不同降水相态与雷达观测结果进行关联匹配。