GEM: Mapping Field-Aligned Current and Poynting Flux in Geospace

GEM：绘制地球空间中的场对准电流和坡印廷通量

• 批准号: 1303116
• 负责人: Daniel Weimer
• 金额: $ 31.3万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1303116&HistoricalAwards=false
• 关键词: GEM; Mapping; Field; Aligned; Current

This is a proposal to improve empirical models of the mapping of ionospheric field-aligned currents (FAC) as a function of interplanetary magnetic field (IMF) by using data which are both more accurate and of large volume than those used in previous models. This mapping will cover an entire solar cycle. The magnetic field data to be used in the FAC calculation will come from th Oersted, CHAMP and eventually Swarm missions. Solar wind data will come from the ACE satellite. The team will use the FAC to develop mappings of the Poynting flux. This in turn will aid prediction of density and temperature in the upper atmosphere. Intervals with polar cap potential saturation during large magnetic storms will be examined to see if the current density and total current will saturate. A graduate student will be supported by this grant. The PI has an excellent record of disseminating his models to the larger science community.

这是一项提议，通过使用比以前模型中使用的数据更准确、更大量的数据来改进电离层场对准电流（FAC）映射作为行星际磁场（IMF）函数的经验模型。这张地图将覆盖整个太阳周期。 FAC 计算中使用的磁场数据将来自奥斯特、CHAMP 和最终的 Swarm 任务。太阳风数据将来自 ACE 卫星。该团队将使用 FAC 来绘制坡印廷通量图。 这反过来又将有助于预测高层大气的密度和温度。将检查大磁暴期间极帽电势饱和的间隔，以查看电流密度和总电流是否会饱和。研究生将获得这笔补助金的支持。 PI 在向更广泛的科学界传播他的模型方面有着出色的记录。