GPM GROUND VALIDATION AUTONOMOUS PARSIVEL UNIT (APU) MC3E V1

The GPM Ground Validation Autonomous Parsivel Unit (APU) MC3E dataset was collected by the Autonomous Parsivel Unit (APU), which is an optical disdrometer that measures the size and fall velocity of single precipitation particles. The APU consists of the Parsivel (the precipitation measuring instrument), developed by OTT in Germany, and its support systems, which were designed and built by the University of Alabama in Huntsville. The APU dataset for the Midlatitude Continental Convective Clouds Experiment (MC3E) provides precipitation data including raindrop size, precipitation drop size, precipitation rate and amount. The Midlatitude Continental Convective Clouds Experiment (MC3E) took place in central Oklahoma during the April-June 2011 period. The experiment was a collaborative effort between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility and the National Aeronautics and Space Administration's (NASA) Global Precipitation Measurement (GPM) mission Ground Validation (GV) program. The field campaign leveraged the unprecedented observing infrastructure currently available in the central United States, combined with an extensive sounding array, remote sensing and in situ aircraft observations, NASA GPM ground validation remote sensors, and new ARM instrumentation purchased with American Recovery and Reinvestment Act funding. The overarching goal was to provide the most complete characterization of convective cloud systems, precipitation, and the environment that has ever been obtained, providing constraints for model cumulus parameterizations and space-based rainfall retrieval algorithms.

GPM 地面验证自主 Parsivel 单元（APU）MC3E 数据集由自主 Parsivel 单元（APU）收集而成，该单元为一款光学谱仪，用于测量单个降水粒子的尺寸和下降速度。APU 由德国 OTT 开发的 Parsivel（降水测量仪器）及其支持系统组成，支持系统由阿拉巴马大学亨茨维尔分校设计和建造。MC3E（中纬度大陆性对流云实验）的 APU 数据集提供了包括雨滴尺寸、降水滴尺寸、降水率和总量在内的降水数据。MC3E 实验于 2011 年 4 月至 6 月期间在俄克拉荷马州中部进行。该实验是美国能源部（DOE）大气辐射测量（ARM）气候研究设施与国家航空航天局（NASA）全球降水测量（GPM）任务地面验证（GV）计划之间的合作项目。该野外实验利用了目前美国中部前所未有的观测基础设施，结合了广泛的探空阵列、遥感以及原位飞机观测、NASA GPM 地面验证远程传感器和由美国复苏与再投资法案资金购买的新 ARM 仪器。其总体目标是提供迄今为止对对流云系统、降水及其环境的最为完整的表征，为模型积云参数化和基于空间的降雨检索算法提供约束。