GEM: Observational Tests of Radiation Belt Theories and Models in the Geospace Environment Modeling (GEM) Inner Magnetosphere Storms Campaign

这项研究计划将通过将理论和模型结果与美国宇航局极地卫星和全球定位系统卫星获得的观测数据进行比较，来检验现有的辐射带理论和模型。它将对不同L壳和不同当地时间的粒子俯仰角分布作为磁暴相位的函数进行统计描述。这将使得区分相对论电子的输运和损失的相互竞争的理论成为可能。它还将确定在不同条件下哪些机制主导运输和损失过程。此外，该项目还将为选定供地球空间环境建模运动研究的关于内磁层和磁暴的事件编制随时间变化的相空间密度分布。这些概况将向空间物理界提供，以帮助建立对相对论电子加速发生的时间和地点的了解。这些轮廓也将有助于约束目前正在进行的理论工作。

This research program will test current theories and models of the radiation belts by comparing the theoretical and model results with observational data obtained from the NASA Polar satellite and the GPS satellites. It will develop statistical descriptions of the particle pitch angle distributions for different L-shells and different local times as a function of the phase of a magnetic storm. This will make it possible to distinguish among competing theories for the transport and loss of relativistic electrons. It will also determine which mechanisms dominate the transport and loss processes under different conditions. In addition, the project will develop time-dependent phase space density profiles for the events selected for study in the Geospace Environment Modeling campaign on the inner magnetosphere and magnetic storms. These profiles will be made available to the space physics community to help establish an understanding of when and where relativistic electron acceleration is occurring. The profiles will also be useful in constraining the theoretical work currently being done.