Dual-Beam Incoherent Scatter Radar Study of the Mesosphere at Arecibo

阿雷西博中间层的双波束非相干散射雷达研究

• 批准号: 0337245
• 负责人: Qihou Zhou
• 金额: $ 21.04万
• 依托单位: Miami University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-03-01 至 2008-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0337245&HistoricalAwards=false
• 关键词: Dual; Beam; Incoherent; Scatter; Radar

The new dual-beam capability of the Arecibo Observatory incoherent scatter radar is used to derive unprecedented information about transport and momentum flux in the complex ionospheric D-region. The horizontal and vertical wavelengths, the propagation direction, and the horizontal coherence of gravity waves in the region are derived using the dual-beam technique. Small beam motions in the observation direction are used to remove historical ambiguities in the horizontal wavelength determination. The momentum flux and momentum deposition in the D-region are determined during large-wave events by quantification of terms in extant theoretical parameterizations. The characteristic time constant of gravity wave propagation is experimentally matched or bettered by a novel 4 ms inter-pulse-period sampling technique. The D-region transport characterization is central first-step to untangling the complex transport and chemical coupling in the region that determines the observed variations of temperature and density.

阿雷西博天文台非相干散射雷达的新双波束功能用于获取有关复杂电离层 D 区输运和动量通量的前所未有的信息。 使用双光束技术得出该区域重力波的水平和垂直波长、传播方向和水平相干性。 观察方向上的小光束运动用于消除水平波长确定中的历史模糊性。 D 区的动量通量和动量沉积是在大波事件期间通过现有理论参数化中的项的量化来确定的。 重力波传播的特征时间常数通过实验匹配或通过新颖的 4 ms 脉冲周期间采样技术得到改善。 D 区输运表征是解开该区域复杂输运和化学耦合的核心第一步，决定了观察到的温度和密度变化。