GEM: Combining Remote and In Situ Observations in the Plasma Sheet

GEM：结合等离子体片中的远程和现场观察

• 批准号: 0703445
• 负责人: Simon Wing
• 金额: $ 33.24万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0703445&HistoricalAwards=false
• 关键词: GEM; Combining; Remote; Situ; Observations

Under previous NSF and NASA support a technique has been developed for inferring the density of ions, the temperature and the pressure in the plasma sheet of Earth's magnetosphere. This project will (1) radically improve the ionosphere-magnetosphere mapping using grad(p) = j x B relationship; (2) expand the remote sensing technique to include (a) in situ measurements and (b) the magnetospheric electric field; (3) study plasma sheet ion sources and transport for northward and southward IMF; (4) investigate plasma sheet ion entry, loss, and filling rates; (5) study the causes of the dawn-dusk asymmetry in the plasma sheet flanks, which could help determine the roles of competing solar wind entry mechanisms; and (6) investigate magnetosheath ion and electron heating. To carry out the study, data from the ionosphere as well as in situ observations will be combined with 3D plasma equilibrium modeling as well as 2D simulations that include full ion and electron kinetic processes. The project will connect theorists/modelers and observers. In addition, the project will train a summer college student on space physics analysis techniques and scientific programming.

在国家科学基金会和美国航天局以前的支持下，已经开发出一种技术，用于推断地球磁层等离子体片中的离子密度、温度和压力。 该项目将（1）利用格拉德（p）= j x B关系从根本上改进电离层-磁层绘图;（2）扩大遥感技术，以包括（a）现场测量和（B）磁层电场;（3）研究向北和向南的IMF的等离子体片离子源和迁移;（4）调查等离子体片离子进入、损失和填充率;（5）研究等离子体片侧翼晨昏不对称的原因，这可能有助于确定竞争太阳风进入机制的作用;（6）研究磁鞘离子和电子加热。为了进行这项研究，来自电离层的数据以及现场观测将与三维等离子体平衡建模以及包括完整离子和电子动力学过程的二维模拟相结合。该项目将连接理论家/建模者和观察者。此外，该项目还将对一名暑期大学生进行空间物理分析技术和科学方案编制方面的培训。