IDRA weather radar measurements - day 2015-03-23

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。观测仪器：位于荷兰卡堡市CESAR（Cabauw Experimental Site for Atmospheric Research，大气研究实验场）天文台的IDRA（IRCTR Drizzle Radar）大气雷达。IRCTR搭建了这套高分辨率雷达系统，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月底部署于荷兰卡堡市CESAR天文台内一座213米高的气象塔塔顶。该选址具备多重优势：其一，地面杂波影响大幅削弱，雷达灵敏度得以提升；其二，可直接观测低层云与雾的水平分布特征；其三，周边搭载的其他观测设备可与本系统协同联动，通过融合多源观测数据，助力研究者深入理解大气物理过程。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系统可输出反射率（reflectivity）、平均多普勒速度（mean Doppler velocity）、多普勒谱宽（Doppler spectrum width）等雷达观测数据，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）等偏振参数的水平分布信息。所采集的全部观测数据对全球科研群体免费开放。