Coordinated Analysis of Fully Polarimetric CSU-CHILL Radar Signatures with Surface and Airborne Hydrometeor Images

科罗拉多州立大学学报（自然科学版）CSU-CHILL全极化雷达特征与地面和机载水流星图像的协调分析CSU-CHILL极化雷达数据与来自两个仪器化跟踪车、机载成像探头和其他辅助地面观测的原位水流星测量数据进行协调分析，以评估和改进本体水流星分类方案和降水估计算法。在1995年6月的一次部署中，装备了高体积粒子光谱仪（HVPS）的T-28飞机在三次对流风暴和一次亮带事件中获得了高质量的水流星图像。在一辆追逐车上安装了从奥地利格拉茨的Joanneum研究公司租借的2d视频测差仪。在有时夹杂冰雹的强降雨中，这辆面包车拦截了许多风暴细胞，提供了高质量的图像数据（正面和侧面视图，垂直速度）。在1996/97冬季，disdrometer在CSU校园站点放置了一段时间，在NCAR Marshall站点放置了另一段时间，在那里与其他辅助测量（雪量计，formvar复制）一起采样了各种冬季降水。第二辆追逐车配备了一个安装在车顶的捕雹网（NCAR设计）和一个电容雨量计。进行了多次冰雹拦截，从而确定了时间分辨冰雹率和大小分布。最近开发的最优面积算法解决了高空雷达测量与地面仪器比较的问题，将进一步完善和评估。该提案寻求对这些原位水流星数据进行综合分析的资金，以推进基于极化的水流星分类方案，并更全面地评估混合相降水的极化降雨率算法。

AbstractATM-9730231Bringi, V. N.Colorado State UniversityTitle: Coordinated Analysis of Fully Polarmetric CSU-CHILL Radar Signatures with Surface and Airborne Hydrometeor ImagesCoordinated analysis of CSU-CHILL polarimetric radar data and insitu hydrometeor measurements from two instrumented chase vans, airborne imaging probe, and other auxiliary surface observations is proposed for evaluating and improving bulk-hydrometeor classification schemes and precipitation estimation algorithms. The T-28 aircraft equipped with the High Volume Particle Spectrometer (HVPS) obtained high quality hydrometeor images in three convective storms and one bright-band event during a deployment in June 1995. One chase van was instrumented with the 2D-video disdrometer obtained on lease from Joanneum Research, Graz, Austria. Numerous storm cell intercepts were made with this van providing high quality image data (front and side views, vertical speed) in intense rain mixed at times with hail. During the 1996/97 winter season, the disdrometer was located for one period at the CSU campus site, and for another period at the NCAR Marshall field site where a variety of winter precipitation was sampled in conjunction with other auxiliary measurements (snow gauge, formvar replication). A second chase van was equipped with a roof-mounted hail catcher net (of NCAR design) and a capacitance rain gauge. Numerous hail intercepts were made enabling the determination of time-resolved hail rates and size distributions. Recently developed optimal area algorithms which address the problem of comparing radar measurements aloft with surface instruments will be further refined and evaluated. This proposal seeks funding for a comprehensive analysis of these insitu hydrometeor data to advance polarimetric-based hydrometeor classification schemes and more fully evaluate polarimetric rainrate algorithms in mixed phase precipitation.