Ground based monitoring of plasma dynamics in the magnetosphere

磁层等离子体动力学的地面监测。我们将使用一种新技术来研究等离子体顶层，这是地球空间中一种基本的、高度动态的边界。通常使用航天器和地面甚低频测量来检查这一点，但这些测量受到几个限制。我们已经开发了通过测量地磁线振荡的共振频率来监测地球空间中的等离子体密度的能力。该项目将使用大量地面磁力计阵列的数据，从而研究等离子体顶层附近粒子密度的空间和时间变化。与甚低频和航天器测量相比较，将提供关于这一重要区域等离子体成分和动力学的新信息。

Ground based monitoring of plasma dynamics in the magnetosphere. We will use a new technique to study the plasmapause, a fundamental and highly dynamic boundary in geospace. This is usually examined using spacecraft and ground-based VLF measurements, but these suffer several limitations. We have developed the ability to monitor plasma density in geospace, by measuring the resonant frequency of geomagnetic field line oscillations. This project will use data from extensive ground magnetometer arrays to thus study the spatial and temporal variation in particle density near the plasmapause. Comparison with VLF and spacecraft measurements will provide new information on the plasma composition and dynamics in this important region.