Performance of the Hail Differential Reflectivity (HDR) Polarimetric Radar Hail Indicator
Performance of the Hail Differential Reflectivity (HDR) Polarimetric Radar Hail Indicator
复制标题
冰雹差分反射率 (HDR) 偏振雷达冰雹指示器的性能
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
S. Rutledge
中科院分区：
文献类型：
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作者：
T. Depue;P. Kennedy;S. Rutledge
摘要在科罗拉多州立大学-芝加哥大学-伊利诺伊州立大学S波段偏振雷达观测到冰雹后，进行了一系列的雨后调查。冰雹特征信息(最大直径、建筑物损坏、冰雹表观密度等)向调查期间联系的普通公众风暴观察员征求了意见；他们的观测地点是使用全球定位系统设备确定的。低仰角雷达的反射率、差分反射率ZDR和线性消偏率(LDR)的测量被内插到地面观测站位置。研究了冰雹差异反射率参数HDR与观测者报告的冰雹特征之间的关系。结果发现，21和30dBHDR阈值在识别大冰雹(直径19 mm)和结构破坏冰雹的区域方面是相当成功的(∼的临界成功指数值为0.77)。
Abstract A series of poststorm surveys were conducted in the wake of hailstorms observed by the Colorado State University–University of Chicago–Illinois State Water Survey (CSU-CHILL) S-Band polarimetric radar. Information on hail characteristics (maximum diameter, building damage, apparent hailstone density, etc.) was solicited from the general-public storm observers that were contacted during the surveys; the locations of their observations were determined using GPS equipment. Low-elevation angle radar measurements of reflectivity, differential reflectivity ZDR, and linear depolarization ratio (LDR) were interpolated to the ground-observer locations. Relationships between the hail differential reflectivity parameter HDR and the observer-reported hail characteristics were examined. It was found that HDR thresholds of 21 and 30 dB were reasonably successful (critical success index values of ∼0.77) in respectively identifying regions where large (>19 mm in diameter) and structurally damaging hail were obse...