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

研究人员将结合同步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量通量，以及由此产生的原子氧浓度变化。研究人员将使用来自格陵兰岛Sondre Stromfjord过去实验活动的数据，包括由非相干散射雷达测量的电子密度，由多通道光度计测量的关键发射特征的天顶强度，从Fabry-Perot干涉仪测量推断的风，来自全天空相机的图像，来自地面磁力计链的磁场变化，以及来自极轨卫星的数据。他们将把原子氧的时间变化与粒子和焦耳加热速率联系起来，这是根据模型和同步卫星和地面磁力计数据估计出来的。这些数据将用于研究热层对粒子和焦耳加热的响应，预激发的极光电子的等离子体特性，与观测到的光学发射特征相关的产生和损失，以及与这些发射特征相关的种群和相对跃迁率。

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.