PAR007 Optical disdrometer data in the meteorological tower at Cabauw

<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 "PAR007" at a height of 180 meters in the meteorological tower of Cabauw. This highly unusual location for a precipitation sensor was specifically chosen to study the effect of wind, turbulence and shielding on raindrop size distributions, as well as to quantify the vertical variability of rain near the surface. Two other disdrometers "PAR001_Cabauw" and "PAR002_Cabauw" located on the ground, approximately 200 meters away can be used as a reference to assess biases and measurement uncertainty. The site also features a vertically profiling micro-rain radar named "MRR002_Cabauw".<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.<br><strong>Note:</strong> This dataset is updated approximately every 3 months. Please reach out to the authors if you wish to get access to the most recent data.<br><strong>Known issues:</strong>Due to technical issues, no data are available between December 28, 2022 and January 3, 2023.Due to technical issues, no data are available between June 16 and July 6, 2023.Due to an upgrade in data logging software, no data are available between November 8 and December 4, 2023.Due to technical issues, no data are available between January 19 and February 11, 2024.

数据集描述：本数据集包含由布设于卡堡（Cabauw）气象塔180米高度处、编号为PAR007的OTT Parsivel2型雨滴谱仪(Disdrometer)获取的原位观测数据，观测内容涵盖雨滴尺寸分布、下落末速度、雨滴数浓度及地表降雨率。该降水传感器的布设点位极为特殊，本次研究特意选取该位置，旨在探究风场、湍流效应及遮挡效应对雨滴尺寸分布的影响，并量化近地表降雨的垂直变异性。另有两台分别编号为PAR001_Cabauw与PAR002_Cabauw的雨滴谱仪布设于约200米外的地面点位，可作为参考基准，用于评估测量偏差与不确定度。该观测站点还配备了一台编号为MRR002_Cabauw的垂直廓线微型降雨雷达(Micro-rain Radar)。

数据格式：每份NetCDF文件涵盖一整月的观测数据，时间分辨率为1分钟。数据按“原样”提供，未经过任何后处理。NetCDF文件包含所有变量、属性及单位的完整相关信息；其全局属性中存储了传感器类型、数据记录软件、项目参与方及数据集历史沿革等关键信息。若某月份的NetCDF文件缺失，则对应时段无可用观测数据。

应用场景：光学雨滴谱仪数据可从地面固定观测者的视角，用于研究降水的类型、动力学特性与微物理过程。该数据集可用于气象雷达校准、提升定量降水估测精度、计算电磁信号在大气中的吸收、衰减与传播特性，以及量化液态水含量、降雨量、降雨强度及动能等重要物理量。

使用须知：本数据集约每3个月更新一次。若需获取最新版本的数据，请联系数据集作者。

已知问题：受技术故障影响，2022年12月28日至2023年1月3日、2023年6月16日至7月6日及2024年1月19日至2月11日期间无可用观测数据；因数据记录软件升级，2023年11月8日至12月4日期间无可用观测数据。