CEDAR: Using Coincident Radar and Optical Data from CEDAR Auroral Campaigns to Investigate Thermospheric Response to Heating, Energization of Electrons, and Emission Processes

研究人员将结合一致的地面光学和雷达数据，同时确定沉淀电子的平均能量和能流，以及由此产生的原子氧浓度的变化。研究人员将使用格陵兰岛Sondre Stromfjord过去的实验活动数据，包括非相干散射雷达测量的电子密度、多通道光度计测量的关键发射特征的天顶强度、法布里-珀罗涉仪测量得出的风、全天相机拍摄的图像、一系列地面磁强计的磁场变化以及极轨卫星的数据。他们将把原子氧的时间变化与粒子和焦耳加热率联系起来，这些加热率是根据模型以及一致的卫星和地面磁力计数据估计的。这些数据将用于研究热层对粒子和焦耳加热的响应、预能极光电子的等离子体特征、与观测到的光学发射特征有关的产生和损失，以及也与这些发射特征有关的种群和相对跃变率。

The investigators will combine coincident ground-based optical and radar data to simultaneously specify the average energy and energy flux of precipitating electrons and the resulting changes in the atomic oxygen concentration. The investigators will use data from past experimental campaigns at Sondre Stromfjord, Greenland, including electron densities measured by the incoherent scatter radar, zenith intensities of key emission features measured by multi-channel photometers, winds inferred from Fabry-Perot interferometer measurements, images from an all-sky camera, magnetic field variations from a chain of ground-based magnetometers, and data from polar-orbiting satellites. They will correlate time variations in atomic oxygen with the particle and Joule heating rates, estimated from models and coincident satellite and ground-based magnetometer data. These data will be used to study the thermospheric response to particle and Joule heating, plasma characteristics of pre-energized auroral electrons, production and loss associated with observed optical emission features, and populations and relative transition rates also associated with these emission features.