Multi-Spacecraft Investigations of Coupling at Auroral Latitudes (MuSICAL): Field-Aligned Current Energetics and Scales

极光纬度耦合的多航天器研究 (MuSICAL)：场对准的电流能量和尺度

• 批准号: 273524721
• 负责人: Professor Dr. Joachim Vogt
• 金额: --
• 依托单位: Department of Physics and Earth Sciences
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/273524721?language=en
• 关键词: Multi; Spacecraft; Investigations; Coupling; Auroral

Auroral field-aligned currents are of key importance for the electromagnetic coupling and the energy transport in the magnetosphere-ionosphere system. Using Swarm multi-spacecraft magnetic and electric field measurements and multi-point reconstruction methods for planar structures in geospace, we are going to analyze and study in detail the fine structure of sheets of auroral field-aligned currents. Preferred spatial scales are expected to help identifying auroral acceleration mechanisms. Our results will be compared with current profiles of other force-free plasma structures in the Earth's space environment such as directional discontinuities in the solar wind. With our collaboration partners we plan to make use of Swarm magnetic and electric field measurements in the auroral zone for quantifying height-integrated Joule heating rates and estimating the energy deposition into the upper atmosphere.

极光场向电流对磁层-电离层系统的电磁耦合和能量输运具有重要意义。利用Swarm多航天器磁场和电场测量以及地球空间平面结构的多点重建方法，对极光场向电流片的精细结构进行了详细的分析和研究。预计首选的空间尺度将有助于确定极光加速机制。我们的研究结果将与目前的配置文件的其他力免费等离子体结构在地球的空间环境，如太阳风的方向不连续性。与我们的合作伙伴一起，我们计划利用极光区的Swarm磁场和电场测量来量化高度积分焦耳加热率并估计高层大气中的能量沉积。