IDRA weather radar measurements - day 2017-01-28

Radar range: far. Max rain level: moderate rain. Parent item: IDRA weather radar measurements - month 2017-01 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：中雨。
父数据集项：IDRA气象雷达观测数据——2017年1月数据集。
测量仪器：位于荷兰卡鲍市CESAR（大气研究卡鲍实验站，Cabauw Experimental Site for Atmospheric Research）观测站内的IDRA大气雷达。
IRCTR已构建一套高分辨率雷达系统IDRA（IRCTR毛毛雨雷达，IRCTR Drizzle Radar），旨在对降雨与毛毛雨的时空分布开展精细化观测。该系统于2007年8月底部署在观测站内一座213米高的气象塔塔顶。
该观测点位具备多项显著优势：其一，可有效削弱地面杂波（ground clutter）影响，提升观测灵敏度；其二，能够直接获取低层云与雾的水平分布观测数据；其三，观测站周边搭载的其他科研仪器可实现观测数据的协同融合，助力研究者深入解析大气物理过程。
CESAR观测站其他仪器的观测数据可通过网址{http://www.cesar-database.nl}获取。
IDRA系统可提供反射率（reflectivity）、平均多普勒速度（mean Doppler velocity）、多普勒谱宽（Doppler spectrum width）以及差分反射率（differential reflectivity）、线性退极化比（linear depolarization ratio）、差分相移率（specific differential phase）等极化参数（polarimetric parameters）的水平分布数据。
所采集的数据集可对全球科学界免费开放获取。