IDRA weather radar measurements - day 2016-08-23

Radar range: far. Max rain level: weak rain. Parent item: IDRA weather radar measurements - month 2016-08 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：远距。
最大降雨等级：弱降雨。
父数据集：IDRA气象雷达观测数据——2016年8月
测量仪器：位于荷兰卡堡CESAR大气研究观测台的IDRA大气雷达。

IRCTR已搭建一套高分辨率雷达系统IDRA（IRCTR雨滴雷达，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月末部署在荷兰卡堡市CESAR（卡堡大气研究实验台）观测站内一座213米高的气象铁塔顶端。

该选址具备多重优势：其一，可减弱地面杂波影响，提升探测灵敏度；其二，可直接观测低层云与雾的水平分布特征；其三，观测站周边搭载的其他仪器可与本系统协同开展观测，通过融合多仪器观测数据，深化对大气物理过程的理解。

CESAR观测站内其他仪器的公开数据可访问：{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。所采集的数据集面向科研界免费开放。