IDRA weather radar measurements - day 2015-03-16

Radar range: standard. Max rain level: moderate rain. Parent item: IDRA weather radar measurements - month 2015-03 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：IDRA气象雷达观测数据——2015年3月。
测量仪器：位于荷兰卡堡CESAR观测台的IDRA大气雷达。
IRCTR 搭建了一套高分辨率雷达系统IDRA（IRCTR细雨雷达，IRCTR Drizzle Radar），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月末部署于荷兰卡堡的CESAR（卡堡大气研究实验站，Cabauw Experimental Site for Atmospheric Research）观测台内一座213米高的气象塔塔顶。

该选址具备多项优势：其一，可削弱地面杂波干扰，提升观测灵敏度；其二，可直接获取低层云与雾的水平分布信息；其三，台站周边配备多台其他观测仪器，通过协同融合多源观测数据，可深化对大气物理过程的认知。
CESAR观测台其他仪器的观测数据可通过以下网址获取：{http://www.cesar-database.nl}。

IDRA可输出反射率、平均多普勒速度、多普勒谱宽以及偏振观测参数（含差分反射率、线性退极化比、比差分相位）的水平分布数据。本次采集的观测数据面向全球科研群体免费开放。