A Study of Mesospheric Radar Scattering Processes

中层雷达散射过程研究

• 批准号: 9216683
• 负责人: Robert Roper
• 金额: $ 7.53万
• 依托单位: Georgia Tech Research Corporation - GA Tech Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-15 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9216683&HistoricalAwards=false
• 关键词: Study; Mesospheric; Radar; Scattering; Processes

A Study of Mesospheric Radar Scattering In this one year program of research, an explanation will be sought for the disagreement between motions inferred from the analysis of incoherent scatter and partial reflection radar data as measured during the Arecibo Initiative on the Dynamics of the Atmosphere, March through May, 1989 (AIDA '89). The principal data sources to be utilized come from the Arecibo observatory UHF incoherent scatter radar (ISR) observations, from the Utah State University imaging doppler interferometry (IDI) MF radar and from the Geospace Research meteor wind radar (MWR). The investigation will concentrate on the scattering mechanisms involved, which, at least in the case of the IDI, are as yet not fully understood. The IDI scattering points may originate from turbulent eddies in the mean flow, or they may be specular reflection from individual gravity wave fronts. To address this problem the investigators will rely heavily on the considerable body of knowledge available on the propagation of waves in turbulent media, and on an existing archive of "snapshots" of small scale motions at mesospheric - lower thermospheric altitudes as revealed by high resolution photography of rocket released chemical trails.

中层雷达散射的研究 在这个为期一年的研究计划中，将寻求对通过分析非相干散射和部分反射雷达数据推断出的运动之间的不一致进行解释，这些数据是在阿雷西博大气动力学倡议（1989 年 3 月至 5 月）期间测量的（AIDA '89）。 使用的主要数据源来自阿雷西博天文台超高频非相干散射雷达（ISR）观测、犹他州立大学成像多普勒干涉测量（IDI）中频雷达和地球空间研究流星风雷达（MWR）。 调查将集中于所涉及的散射机制，至少在 IDI 的情况下，该机制尚未完全了解。 IDI 散射点可能源自平均流中的湍流涡流，或者它们可能是来自各个重力波前的镜面反射。 为了解决这个问题，研究人员将在很大程度上依赖于关于湍流介质中波传播的大量可用知识，以及火箭释放的化学尾迹的高分辨率摄影所揭示的中层-较低热层高度小尺度运动的现有“快照”档案。