IDRA weather radar measurements - day 2009-12-12

Radar range: standard. Max rain level: weak rain. Parent item: IDRA weather radar measurements - month 2009-12 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：弱降雨。父数据集项：IDRA气象雷达观测数据——2009年12月。观测仪器：荷兰卡堡CESAR（大气研究卡堡实验场，Cabauw Experimental Site for Atmospheric Research）观测站内的IDRA（IRCTR毛毛雨雷达）大气雷达。IRCTR搭建了一套高分辨率雷达系统IDRA（IRCTR毛毛雨雷达），旨在对降雨与毛毛雨的时空分布开展精细观测。该系统于2007年8月底部署于上述观测站内一座213米高的气象铁塔顶部。该选址具备多项核心优势：其一，地面杂波影响大幅削弱，观测灵敏度显著提升；其二，可直接获取低层云与雾的水平分布观测数据；其三，周边配套的多类观测仪器可通过数据协同融合，助力研究者深入解析大气物理过程。CESAR观测站其他仪器的观测数据可通过网址{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）等雷达观测产品，以及差分反射率（differential reflectivity）、线性退偏振比（linear depolarization ratio）、特定差分相位（specific differential phase）等极化参数（polarimetric parameters）的水平分布信息。本次采集的数据集可面向全球科研共同体免费开放获取。