IDRA weather radar measurements - day 2019-06-13

Radar range: standard. Max rain level: strong rain. Parent item: IDRA weather radar measurements - month 2019-06 Measuring instrument: IDRA atmospheric radar in CESAR observatory, Cabauw IRCTR has built a high resolution radar system, IDRA (IRCTR Drizzle Radar), aimed at the detailed observation of the spatial and temporal distribution of rainfall and drizzle. The system was placed at the end of August 2007 on top of a 213 m high meteorological tower in the CESAR (Cabauw Experimental Site for Atmospheric Research) observatory in Cabauw, The Netherlands. This location has several advantages: In the first place, an increased sensitivity due to the reduction of the influence of ground clutter. Secondly, it allows direct observation of the horizontal distribution of low level clouds and fog. Finally, the presence of other instruments in the vicinity enhances the understanding of the physical processes in the atmosphere by synergistically combining their measurements. Data from other instruments at CESAR are available at {http://www.cesar-database.nl}. IDRA provides the horizontal distribution of reflectivity, mean Doppler velocity, Doppler spectrum width and polarimetric parameters like differential reflectivity, linear depolarization ratio or specific differential phase. The data collected is freely available to the scientific community.

雷达量程：标准量程。最大降雨等级：强降雨。
父数据集项：IDRA气象雷达观测数据——2019年6月。
观测仪器：位于荷兰卡堡CESAR（Cabauw Experimental Site for Atmospheric Research）天文台的IDRA（IRCTR Drizzle Radar）大气雷达。
荷兰卡堡IRCTR搭建了一套高分辨率雷达系统（high resolution radar system）IDRA，旨在对降雨与毛毛雨的时空分布（spatial and temporal distribution）开展精细化观测。该系统于2007年8月底部署于荷兰卡堡CESAR天文台内一座213米高的气象塔（meteorological tower）塔顶。
该观测点位具备多项优势：其一，地面杂波（ground clutter）影响得以削弱，从而提升观测灵敏度；其二，可直接观测低层云（low level clouds）与雾（fog）的水平分布特征；其三，周边部署的其他观测设备可与本系统协同获取观测数据，助力科研人员深入理解大气物理过程（physical processes in the atmosphere）。
CESAR天文台其他观测设备的相关数据可通过 {http://www.cesar-database.nl} 获取。
IDRA可提供反射率（reflectivity）、平均多普勒速度（mean Doppler velocity）、多普勒谱宽（Doppler spectrum width）以及差分反射率（differential reflectivity）、线性退极化比（linear depolarization ratio）、差分相移率（specific differential phase）等偏振参数（polarimetric parameters）的水平分布数据。所采集的数据集面向科研群体免费开放。