Collaborative Research: CEDAR--Development and Application of a Multi-site Observing Network to Study Mid-latitude Thermospheric Dynamics

这是一个为期3年的实验项目，将作为大气区域耦合、能量学和动力学（CEDAR）计划的一部分进行。主要目标是在美国中东部安装和运行一个小型法布里-珀罗干涉仪网络。该网络将由四个站点组成，站点之间的距离在350至700公里之间，从而能够对热层中的风和温度进行共同的体积测量，这些测量共同提供热层风结构和动态的区域视图。这包括量化纬度和经度范围，传播方向，波事件的速度，震源区域和其他动态量，这是不可能与当前可用的仪器部署。将利用现有的地面磁力计和雷达以及对磁场、离子漂移和极光降水的天基测量提供的辅助数据，并结合全球热层/电离层环流模型，为测量提供全球背景。 这样，这些观测将有助于对热层动态的突破性了解，包括大规模扰动远离极光区的传播以及中纬度热层对地磁扰动的反应。作为该项目的一部分，将制定战略和算法，以便根据当地的云状况等实时改变观测战略。从该网络获得的运行经验将作为对热层动力学进行更全面调查所需的更大规模网络的概念证明。该试验网络将在以下问题上取得技术进步，例如理解如何将链作为一个单元进行操作，如何一致地真实的处理数据，以及如何可视化和解释来自多个站点的结果。该项目是克莱姆森大学、密歇根大学和伊利诺伊大学教授团队的合作。 仪器和网络的部署和运行将为每所大学的研究生和本科生提供实际培训机会。

This is a 3-year experimental project to be undertaken as part of the Coupling, Energetics and Dynamics of Atmospheric Regions (CEDAR) program. The main objective is to install and operate a small network of Fabry-Perot interferometers (FPI) in the central eastern United States. The network will consist of four stations with a site-to-site separation between 350 and 700 km allowing common volume measurements of winds and temperatures in the thermosphere that together provide a regional view of the thermospheric wind structure and dynamics. This includes quantifying the latitudinal and longitudinal extents, propagation direction, and speed of wave events, source regions, and other dynamical quantities that are not possible with current available instrument deployments. Supporting data from available ground-based magnetometers and radars as well as space-based measurements of magnetic fields, ion drifts and auroral precipitation will be used together with a global thermosphere/ionosphere general circulation model to provide a global context for the measurements. In this way, the observations will facilitate breakthrough insights about the dynamics of the thermosphere including the propagation of large-scale disturbances away from the auroral zone and the response of the mid-latitude thermosphere to geomagnetic disturbances. Strategies and algorithms will be developed as part of this project to change the observing strategy in real-time based, for example, upon the local cloud conditions. The operational experience gained from this network will serve as a proof of concept for a much larger-scale network required for a more complete investigation of thermospheric dynamics. The pilot network will make technological advances in regard to issues such as understanding how to operate the chain as a unit, how to consistently process data in real time, and how to visualize and interpret results from multiple stations. The project is a collaboration between a team of professors at Clemson University, the University of Michigan, and University of Illinois. Deployment and operation of the instruments and the network will provide hands on training opportunities for graduate and undergraduate students at each of the universities.