Turbulence Measurements from Mesospheric Radar Scattering

中层雷达散射的湍流测量

• 批准号: 9728629
• 负责人: Robert Roper
• 金额: $ 15.96万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9728629&HistoricalAwards=false
• 关键词: Turbulence; Measurements; Mesospheric; Radar; Scattering

The investigator uses experimental data from the MAPSTAR medium frequency partial reflection radar (operated during the Arecibo Initiative on the Dynamics of the Atmosphere). He plans corrections to previously published estimates of atmospheric turbulence in the mesopause, deduced from medium frequency radar, applying the imaging Doppler interferometry (IDI) technique. IDI measures positions and line-of-sight velocities of individual scatterers, so only those scatterers close to the zenith can be chosen, minimizing contamination of the vertical velocity by the larger horizontal components of gravity wave velocities. His method corrects both the remaining gravity wave and finite zenith angle contamination of IDI data. Finally, he compares Doppler broadening, fading rate and IDI turbulent dissipation rate measurements using the AIDA data set.

调查员使用了MAPSTAR中频部分反射雷达(在阿雷西博大气动力学倡议期间运行)的实验数据。他计划应用成像多普勒干涉(IDI)技术，对之前发表的从中频雷达推导出的中层顶大气湍流估计进行修正。IDI测量单个散射体的位置和视线速度，因此只能选择接近天顶的散射体，从而最大限度地减少重力波速度的较大水平分量对垂直速度的污染。他的方法改正了IDI数据的剩余重力波和有限天顶角污染。最后，他使用AIDA数据集比较了多普勒展宽、衰落速率和IDI湍流耗散率测量结果。