IDRA weather radar measurements - day 2014-05-28

Radar range: standard. Max rain level: weak rain. Parent item: IDRA weather radar measurements - month 2014-05 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：小雨。
父数据集：IDRA气象雷达观测数据——2014年5月月度数据集
观测仪器：位于荷兰卡鲍CESAR（大气研究实验场，Cabauw Experimental Site for Atmospheric Research）天文台的IDRA（IRCTR Drizzle Radar）大气雷达。

荷兰IRCTR搭建了一套高分辨率雷达系统IDRA，旨在精细化观测降雨与毛毛雨的时空分布特征。该系统于2007年8月底部署于上述天文台内一座213米高的气象塔塔顶。

该观测点位具备多重优势：其一，可降低地面杂波影响，提升观测灵敏度；其二，能够直接观测低层云与雾的水平分布特征；其三，周边配备多台观测仪器，可通过协同整合多源观测数据，深化对大气物理过程的理解。

CESAR天文台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、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。

所采集的观测数据可对科研社区免费开放获取。