Polarimetric and Spaced Antenna Velocity Measurements of Severe Storms and Tornadoes with Mobile Radars

使用移动雷达对强风暴和龙卷风进行偏振和间隔天线速度测量

• 批准号: 0242166
• 负责人: Stephen Frasier
• 金额: $ 48.06万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2006-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0242166&HistoricalAwards=false
• 关键词: Polarimetric; Spaced; Antenna; Velocity; Measurements

The research supported under this award is focused on the development of advanced, mobile radar systems to be used in meteorological research. Specific research efforts are the following:1. Implement and validate a dual-polarized spaced-antennae transverse velocity measurement technique with the X-band radar to measure scatterer velocity component perpendicular to the beam pointing direction. This technique, in combination with conventional Doppler measurements, will lead to the collection of two-dimensional velocity field data with a single, spaced-antennae Doppler radar system. The intellectual merit of this effort is significant, as two-dimensional velocity measurements have been difficult and only been accomplished with coarse resolution, vertical-pointing wind profilers, coordinated measurement with multiple radar systems or with a scanning radar which requires the assumption of a uniform wind field.2. Develop and test polarimetric calibration techniques and rain rate and hail mapping algorithms for the X-band radar. The intellectual merit of this research effort is the potential for quantitative precipitation mapping at a spatial resolution that is not possible with the more common S-band weather radar systems.3. Field test and collect high temporal resolution (10-20 second update) volume (0-24 deg elevation, 360 deg azimuth, to 30 km range) reflectivity and Doppler velocity field data in storms with a mobile X-band phased array Doppler radar system, which is being partially developed under support from the Office of Naval Research.As part of this research, Dr. Pazmany will coordinate his activities with Dr. Bluestein of the University of Oklahoma (ATM-0241037). Dr. Bluestein is an atmospheric scientist and the primary objective of his research is to use observations and numerical models to study various aspects of severe storms and tornadoes. Dr. Pazmany and his advanced radars will contribute to the observational base to be used by Dr. Bluestein. Due to this joint research effort, it is anticipated that the broader impacts of the proposed activity will ultimately lead to a more accurate prediction of severe weather events.

该奖项支持的研究重点是开发用于气象研究的先进移动雷达系统。 具体的研究工作如下：1。 用X波段雷达实现并验证双偏置的间距横向速度测量技术，以测量垂直于光束指向方向的散射速度速度分量。 该技术与常规的多普勒测量结果结合使用，将导致收集二维速度场数据，并具有单个间隔的 - 安特纳奈德多普勒雷达系统。 这项工作的智力优点是显着的，因为二维速度测量很困难，并且只有通过粗分辨率，垂直垂直的风依赖器，与多个雷达系统的协调测量或使用扫描雷达进行协调的测量，这需要均匀的风场假设。2。 开发和测试了X频段雷达的偏光校准技术和降雨速率以及冰雹映射算法。 这项研究工作的智力优点是在空间分辨率下进行定量降水量映射的潜力，而更常见的S波段天气雷达系统是不可能的。3。 现场测试并收集高时间分辨率（10-20秒更新）卷（0-24度，高度为360度中，方化，至30 km范围）的反射率和多普勒速度速度在风暴中，移动X波段逐步阶段阵列多普勒雷达系统是由这项研究的一部分，该研究的一部分是由海军研究的一部分开发，该研究是由海军研究的一部分开发的。俄克拉荷马州（ATM-0241037）。 Bluestein博士是一位大气科学家，其研究的主要目的是使用观察和数值模型来研究严重的风暴和龙卷风的各个方面。 Pazmany博士及其高级雷达将为Bluestein博士使用的观察基础做出贡献。 由于这项共同的研究工作，预计拟议活动的更广泛影响最终将导致对恶劣天气事件的更准确的预测。