Ground based monitoring of plasma dynamics in the magnetosphere

磁层等离子体动力学的地面监测。我们将使用一种新的技术来研究等离子体顶，这是地球空间中一个基本的和高度动态的边界。这通常使用航天器和地面VLF测量来检测，但这些测量有一些局限性。我们已经发展了监测地球空间等离子体密度的能力，通过测量地磁场线振荡的共振频率。该项目将使用大量地面磁力计阵列的数据来研究等离子体顶附近粒子密度的时空变化。与VLF和航天器测量的比较将提供关于这一重要区域等离子体组成和动力学的新信息。

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.