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Experiments in X-band Phased-Array Weather Radar Polarimetry

X波段相控阵天气雷达偏振测量实验

基本信息

批准号：
1655693
负责人：
Stephen Frasier
金额：
$ 65万
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：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2021-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1655693&HistoricalAwards=false
关键词：
Experiments band Phased Array Weather

项目摘要

Phased-array radar is a mature technology that has recently been applied to remote sensing of clouds and precipitation. These radar systems have several advantages over current weather radars, however there are biases introduced when dealing with polarimetric variables that help to discriminate between precipitation types. This award will allow researchers to conduct experiments with the goal of providing a clearer picture of the capabilities and limitations of phased-array technology for weather polarimetry. The broader societal impacts of the award are related to improving technology that could eventually be used to study and forecast severe weather. Students would be directly involved in the project, giving them valuable training experience. The radar testbed will be made available to other researchers and it could potentially be used as a gap-filling radar for the local region. Phased-array radar has a long history of use for point measurements, but making polarimetric measurements using phased-array is more complicated than for a traditional antenna design. The PI will perform engineering and observational experiments with the Raytheon Low Power Radar (LPR) to study the polarization performance, biases, and other measurement uncertainties particular to phased-array weather radar antennas, as well as to explore new capabilities including rapid scanning, polarization correction, and alternate polarization bases. The LPR would be co-located with a mechanically-scanned radar for comparison purposes.

相控阵雷达是近年来应用于云和降水遥感的一项成熟技术。这些雷达系统与当前的气象雷达相比有几个优点，但是在处理有助于区分降水类型的极化变量时，会引入偏差。该合同将允许研究人员进行实验，目的是更清楚地了解相控阵技术用于天气偏振测量的能力和局限性。该奖项更广泛的社会影响与改进技术有关，这些技术最终可能用于研究和预测恶劣天气。学生将直接参与项目，获得宝贵的培训经验。雷达试验台将提供给其他研究人员，它可能被用作局部地区的空白填充雷达。相控阵雷达用于点测量有着悠久的历史，但使用相控阵进行极化测量比传统的天线设计更为复杂。PI将与雷声公司低功率雷达（LPR）进行工程和观测实验，研究相控阵气象雷达天线的极化性能、偏差和其他测量不确定性，并探索包括快速扫描、极化校正和交替极化基地在内的新能力。LPR将与一台机械扫描雷达同置，以便进行比较。