CEDAR: Multi-spectral Imaging Investigation of the Auroral Fine Structures Associated with Naturally Enhanced Ion Acoustic Lines

CEDAR：与自然增强离子声线相关的极光精细结构的多光谱成像研究

• 批准号: 1139135
• 负责人: Robert Michell
• 金额: $ 24.42万
• 依托单位: Southwest Research Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-02-01 至 2014-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1139135&HistoricalAwards=false
• 关键词: CEDAR; Multi; spectral; Imaging; Investigation

This project is a synergistic study of radar and optical measurements for investigating and characterizing the occurrence of Naturally Enhanced Ion Acoustic Lines (NEIALs) with coincident auroral fine structures. While it is known that NEIALs are a manifestation of large-amplitude ion acoustic waves and potentially Langmuir waves and/or large current densities, their influence and feedback on the electromagnetic and particle energy transfer within the magnetosphere-ionosphere system is not well understood. The project will make use of common-volume observations of the nighttime auroral ionosphere with ground-based Electron Multiplying Charged Couple Device (EMCCD) imagers and the Poker Flat Incoherent Scatter Radar (PFISR) to gain an improved understanding of NEIAL generation mechanisms. A suite of six narrowfield imagers will be used, each equipped with a different narrow bandpass filter, imaging multiple auroral emission lines simultaneously in order to derive the spatial distribution of the precipitating electron energy. The observations will take place during moon down periods, in both campaign and remote operation modes. The theory and modeling components will be investigated in partnership with an international collaborator.

该项目是一项雷达和光学测量的协同研究，用于调查和表征具有一致极光精细结构的自然增强离子声学线的出现。 虽然已知NEIAL是大振幅离子声波和潜在的朗缪尔波和/或大电流密度的表现，但它们对磁层-电离层系统内的电磁和粒子能量转移的影响和反馈还没有很好地理解。 该项目将利用地面电子倍增电荷耦合器件成像仪和扑克牌平板非相干散射雷达对夜间极光电离层进行共体积观测，以更好地了解NEIAL产生机制。 将使用一套六个窄场成像仪，每个都配备了不同的窄带通滤波器，同时成像多个极光发射线，以获得沉淀电子能量的空间分布。 观测将在月落期间以战役和远程操作模式进行。 理论和建模组件将与国际合作伙伴进行合作研究。