GEM: Mapping the Cusp

由多个机构组成的美国全球变化研究计划(我们的地球变化研究计划，1991年成立的地球科学委员会)的一个组成部分是理解地球空间环境并对其进行建模。作为对美国全球变化研究计划的贡献的一部分，美国国家科学基金会大气科学部建立了一项新的研究计划-地球空间环境建模(GEM)，目的是支持对地球空间动力学和结构属性的基础研究，从而构建具有预测能力的全球地球空间模型。第一次GEM运动的主题是磁层边界、其外的磁鞘以及从边界通过磁层到电离层的连接。这笔赠款是为了使用低空航天器数据来测试和改进Toffoletto和Hillı1989年的开放磁层模型！关于尖点到低海拔的映射。该模式提供了作为交叉极帽势的函数的尖点赤道向边界的当地时间范围和位置的定量预测。

An integral component of the multi-agency U.S. Global Change Research Program (Our Changing Planet," Committee on Earth Sciences, 1991) is understanding and modeling the geospace environment. As part of its contribution to the U.S. Global Change Research Program, the National Science Foundation's Division of Atmospheric Sciences has established a new research initiative, Geospace Environment Modeling (GEM), with the goal of supporting basic research into the dynamical and structural properties of geospace, leading to the construction of a global geospace model with predictive capability. The subjects of the first GEM campaign are the magnetospheric boundary, the magnetosheath beyond it, and the connection from the boundary through the magnetosphere to the ionosphere. This grant is to use low-altitude spacecraft data to test and refine the open-magnetosphere model of Toffoletto and Hill ı1989! with respect to the mapping of the cusp to low altitude. The model provides quantitative predictions of the local time extent and locations of the equatorward boundary of the cusp as a function of the cross-polar-cap potential.