Theoretical Modeling and Data Analysis of Mesospheric Radar Scattering

中层雷达散射的理论建模和数据分析

• 批准号: 8813454
• 负责人: Gene Adams
• 金额: $ 11万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-01 至 1990-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8813454&HistoricalAwards=false
• 关键词: Theoretical; Modeling; Data; Analysis; Mesospheric

The advent of powerful new computing capabilities has made it possible to use radars to provide much more information on the atmospheric inhomogeneities that give rise to atmospheric radar echoes than has previously been the case. It has been possible to measure the frequency (doppler) shift of not one but a number of different returned echoes simultaneously, and at the same time, by the use of several antennas and the technique of interferometry, to determine the precise direction of the scattering centers. Two new radar systems have been built at Utah State University with these capabilities, and they allow determination of three dimensional wind fields in the 20 to 100 km altitude region. Other parameters measured are electron density profiles and the propagation of waves in the ionosphere (travelling ionospheric disturbances). Knowledge of the dynamics of the middle atmosphere is an essential prerequisite to being able to model the effect of chemical changes in that region, and their effect on radiative changes, and ultimately, changes in weather and climate.

强大的新计算能力的出现使得 使用雷达可以提供更多的信息， 大气的不均匀性导致了大气雷达 比以前的情况要好。 已经可以 为了测量不是一个而是多个的频率（多普勒）偏移 不同的回声同时返回， 时间，通过使用几个天线和技术， 干涉测量法，以确定精确的方向， 散射中心 两个新的雷达系统已经建成， 犹他州州立大学拥有这些能力，他们允许 在20到100英里范围内三维风场的测定 千米高空区域。 测量的其他参数是电子 密度分布和波在电离层中的传播 （移动电离层扰动）。 动态知识 大气层的中层是一个必要的先决条件， 能够模拟该地区化学变化的影响， 它们对辐射变化的影响，最终， 天气和气候。