Millimeter and Centimeter Wave Scattering from Ice Crystals,Graupel and Hail

冰晶、霰和冰雹的毫米波和厘米波散射

• 批准号: 9225116
• 负责人: Kultegin Aydin
• 金额: $ 33.41万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-11-01 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9225116&HistoricalAwards=false
• 关键词: Millimeter; Centimeter; Wave; Scattering; Ice

9225116 Aydin The objective of this research is to investigate the radar scattering properties of ice phase hydrometeors in order to better understand and interpret centimeter and millimeter wave polarimetric radar measurements of clouds and precipitation. This will be accomplished through electromagnetic scattering computations and comparisons with experimental measurements. The polarimetric scattering properties of ice crystals such as plates, columns, bullets, needles and dendrites will be evaluated at millimeter wave frequencies for use in discriminating ice crystal habits and estimating their ice mass content with radar. Similar evaluations will be performed for scattering from graupel and hail at centimeter wave frequencies for radar detection and quantitative estimation of hail parameters such as hailfall rate, liquid water in hailfall and hailstone size. ***

9225116艾丹 本研究的目的是调查冰相水凝物的雷达散射特性，以更好地理解和解释厘米和毫米波偏振雷达测量的云和降水。 这将通过电磁散射计算和与实验测量的比较来实现。 将在毫米波频率下评估冰晶（如板、柱、子弹、针和树枝状晶体）的偏振散射特性，以用于区分冰晶习性和用雷达估计其冰质量含量。 将进行类似的评估，散射从和冰雹在厘米波频率的雷达探测和定量估计冰雹参数，如降雹率，冰雹中的液态水和冰雹的大小。 ***