GEM: Characterizing the Global Plasma Pressure During Storms and It's Response to Substorms

该项目将利用来自NASA IMAGE航天器的高能中性原子（ENA）图像来研究地磁风暴期间磁层中全球等离子体压力分布（H+和O+）。来自AMPTE/CCE航天器的额外数据将用于验证压力并指定压力各向异性。将利用的其他数据源包括Cluster航天器、GOES磁力计数据、LANL、Geotail和Polar粒子数据。该项目将利用这些数据来研究风暴时亚风暴注入对风暴时环电流的影响。将从ENA数据中计算出一个与常用的Dst指数相当的磁指数，该指数将用于确定磁暴期间亚暴注入对环电流能量平衡的重要性。所研究的不同风暴的离子压力分布计算结果将提供给一般空间物理学界，并可用于将观测结果与模型结果进行比较。

This project will make use of the energetic neutral atom (ENA) images from the NASA IMAGE spacecraft to investigate the global plasma pressure distributions (both H+ and O+) in the magnetosphere during geomagnetic storms. Additional data from the AMPTE/CCE spacecraft will be used to validate the pressure and specify the pressure anisotropies. Other data sources that will be utilized include the Cluster spacecraft, GOES magnetometer data, LANL, Geotail and Polar particle data. The project will utilize the data to investigate how storm-time substorm injections effect the storm-time ring current. A magnetic index equivalent to the commonly used Dst index will be computed from the ENA data and this will be used to determine the importance of substorm injections to the energy balance in the ring current during magnetic storms. The ion pressure distributions computed for the different storms studied will be made available to the general space physics community and can be used to compare observations with model results.