IDRA weather radar measurements - day 2015-06-27

Radar range: standard. Max rain level: weak rain. Parent item: IDRA weather radar measurements - month 2015-06 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——2015年6月数据集。
测量仪器：荷兰卡堡（Cabauw）CESAR（Cabauw大气研究实验站，Cabauw Experimental Site for Atmospheric Research）观测站内的IDRA大气雷达。IRCTR搭建了一套高分辨率雷达系统——IDRA（IRCTR滴谱雷达，IRCTR Drizzle Radar），旨在精准解析降雨与毛毛雨的时空分布规律。该系统于2007年8月底部署于该观测站内一座213米高的气象塔塔顶。
该观测点位具备三项核心优势：其一，可有效抑制地面杂波干扰，提升雷达探测灵敏度；其二，可直接获取低层云与雾的水平分布观测数据；其三，周边配套的多台其他观测仪器可与本系统协同开展观测，通过融合多源数据助力科研人员深入理解大气物理过程。
CESAR观测站内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（reflectivity）、平均多普勒速度（mean Doppler velocity）、多普勒谱宽（Doppler spectrum width）等核心观测量，以及差分反射率（differential reflectivity）、线性退极化比（linear depolarization ratio）、比差分相位（specific differential phase）等极化观测参数，完整呈现降水的水平分布特征。
本数据集收录的全部观测数据面向全球科研群体免费开放共享。