IDRA weather radar measurements - day 2015-06-22

Radar range: standard. Max rain level: moderate 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：中雨。父数据集：IDRA气象雷达观测数据——2015年6月。
观测仪器：位于荷兰卡堡CESAR观测场的IDRA大气雷达。IRCTR 搭建了一套高分辨率雷达系统——IDRA（IRCTR Drizzle Radar），其研发目标为精准观测降雨与毛毛雨的时空分布特征。该系统于2007年8月底部署在荷兰卡堡的CESAR（Cabauw大气研究实验场，Cabauw Experimental Site for Atmospheric Research）观测场内一座213米高的气象铁塔顶端。
该选址具备多项优势：其一，可削弱地面杂波影响，提升探测灵敏度；其二，能够直接观测低层云与雾的水平分布；其三，周边配套的其他观测仪器可协同整合其观测数据，助力科研人员深入解析大气物理过程。CESAR观测场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（reflectivity）、平均多普勒速度（mean Doppler velocity）、多普勒谱宽（Doppler spectrum width）等参数的水平分布数据，以及差分反射率（differential reflectivity）、线性退偏振比（linear depolarization ratio）、特定差分相位（specific differential phase）等偏振观测参数。本数据集收录的观测数据可对科研社群免费开放获取。