IDRA weather radar measurements - day 2015-04-08

Radar range: standard. Max rain level: moderate rain. Parent item: IDRA weather radar measurements - month 2015-04 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：中雨。父数据集项：IDRA气象雷达观测数据——2015年4月。观测仪器：位于荷兰卡堡CESAR观测站的IDRA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），旨在细致观测降雨与毛毛雨的时空分布特征。该系统于2007年8月底部署于荷兰卡堡的CESAR（大气研究卡堡实验站，Cabauw Experimental Site for Atmospheric Research）观测站内一座213米高的气象铁塔顶部。该观测点位具备多项优势：其一，地面杂波影响得以削弱，雷达灵敏度显著提升；其二，可直接观测低层云与雾的水平分布特征；其三，周边布设的其他观测仪器可与本系统协同联动，通过融合多源观测数据深化对大气物理过程的认知。CESAR观测站其他仪器的观测数据可通过以下网址获取：http://www.cesar-database.nl。IDRA可提供反射率、平均多普勒速度、多普勒谱宽以及偏振参数（如差分反射率、线性退极化比、比差分相位）的水平分布数据。所采集的观测数据对科研群体免费开放。