PAR004 Optical disdrometer data at Westmaas

<strong>Description:</strong> In-situ measurements of raindrop size distributions, fall velocities, drop number concentrations and surface rain rates recorded by an OTT Parsivel2 disdrometer named "PAR004" in Westmaas, The Netherlands. Westmaas is a village in the Dutch province of South Holland located approximately 15 km south of the city centre of Rotterdam, south of the old Meuse. The same site also features a micro-rain radar "MRR003_Westmaas" (since June 2022) and a Davis weather station "Davis003_Westmaas" (since May 2023). All sensors are placed on top of an air quality monitoring container belonging to TNO, at a height of approx. 4 meters. The container is located approximately 1.5 km to the West of the village of Westmaas, in a predominantly flat and rural area.<br><strong>Format:</strong> Each NetCDF file covers a full month of observations. The temporal resolution is 1 minute. Data are provided "as is", without any post-processing. The NetCDF files contain all relevant information about all the variables, attributes and units. The global attributes of the NetCDF files contain important information about the type of sensor, logging software, project contributors and history of the dataset. If a monthly file is missing, no data are available for this month.<br><strong>Relevance:</strong> Optical disdrometer data are useful for studying the type, dynamics and microphysics of precipitation from the perspective of a fixed observer on the ground. The data can be used to help calibrate weather radars, improve quantitative precipitation estimates, calculate the absorption/attenuation/propagation of electromagnetic signals through the atmosphere, and quantify important physical quantities such as liquid water content, rain amount, intensity and kinetic energy.

<strong>描述：</strong>荷兰韦斯特马斯（Westmaas）地区由名为“PAR004”的OTT Parsivel2雨滴谱仪（disdrometer）记录的原位测量（in-situ measurements）数据，涵盖雨滴尺寸分布（raindrop size distribution）、下落速度（fall velocity）、雨滴数浓度（drop number concentration）及地面雨强（surface rain rate）。韦斯特马斯是荷兰南荷兰省（South Holland）的村庄，位于鹿特丹市中心以南约15公里、旧马斯河（old Meuse）南侧。同一站点还配备微型降雨雷达（micro-rain radar）“MRR003_Westmaas”（自2022年6月起）及戴维斯气象站（Davis weather station）“Davis003_Westmaas”（自2023年5月起）。所有传感器均安装于TNO所属空气质量监测集装箱顶部，高度约4米；该集装箱位于韦斯特马斯村以西1.5公里处，地处以平坦乡村为主的区域。<br><strong>格式：</strong>每个NetCDF文件包含一整月观测数据，时间分辨率（temporal resolution）为1分钟。数据以“原样”（as is）提供，未经过任何后处理（post-processing）。NetCDF文件包含所有变量、属性及单位的相关信息；其全局属性（global attribute）涵盖传感器类型、日志软件（logging software）、项目贡献者及数据集历史等重要内容。若某月份文件缺失，则该月份无可用数据。<br><strong>相关性：</strong>光学雨滴谱仪（optical disdrometer）数据有助于从固定地面观测者视角研究降水（precipitation）的类型、动力学特征及微物理过程（microphysics）。该数据可用于校准天气雷达、改进定量降水估计（quantitative precipitation estimate）、计算电磁信号在大气中的吸收/衰减/传播，以及量化液态水含量、降雨量、强度和动能等重要物理量。