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

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（neial）的发生。虽然已知neal是大振幅离子声波和潜在的Langmuir波和/或大电流密度的表现，但它们对磁层-电离层系统内电磁和粒子能量传递的影响和反馈尚未得到很好的理解。该项目将利用地面电子倍增电荷耦合器件（EMCCD）成像仪和扑克平面非相干散射雷达（PFISR）对夜间极光电离层的普通体积观测，以更好地了解NEIAL的产生机制。将使用一套6台窄场成像仪，每台成像仪配备不同的窄带通滤波器，同时对多条极光发射线进行成像，以得出沉淀电子能量的空间分布。观测将在月球降落期间进行，包括战役和远程操作模式。理论和建模组件将与国际合作者合作进行调查。

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.