Continuing Operation of a Magnetometer Array on the Greenland Ice Cap (MAGIC) to Investigate Propagating Ionospheric Current Systems for Geospace Environment Modeling

这项建议的目的是继续在格陵兰冰盖上运行一系列无人值守的自动磁力数据收集平台，并对这些数据进行整理、分发和分析。 MAGIC阵列补充了格陵兰海岸的磁力站。 MAGIC磁站形成一个二维阵列，站间距约为150公里。 这些磁测量的科学目的是与沿海台站一起调查小规模传播的磁扰动，这种扰动似乎是由移动的平行磁场电流与电离层相互作用造成的。 不同类别的这些系统现在已经确定和场向电流的起源似乎是在磁层边界层内的昼侧磁层顶附近。 为了解析这些电流系统的运动和结构演化，具有密集的二维阵列是特别重要的。 格陵兰站与其他GEM资助的站部署在加拿大，使我们能够观察到这些现象在足够的区域，以确定其生成位置，并解决其运动和空间演变的传播。 这些数据和拟议的研究对于了解将太阳风的能量和动量耦合到磁层和电离层的过程的物理学、磁层边界层的物理学以及边界层现象到高纬度电离层的映射都很重要。

This proposal is directed toward the continued operation of an array of unattended, automatic magnetic data collection platforms on the Greenland ice cap and the reduction, distribution and analysis of these data. The MAGIC array complements the magnetic stations on the coasts of Greenland. The MAGIC magnetic stations form a two dimensional array with station separation of about 150 Km. The scientific objective of these magnetic measurements is to investigate, in conjunction with the coastal stations, small-scale propagating magnetic disturbances which appear to result from moving filamentary field-aligned currents interacting with the ionosphere. Different classes of these systems have now been identified and the origin of the field-aligned currents appears to be near the dayside magnetopause within the magnetospheric boundary layer. It is particularly important to have a dense two- dimensional array in order to resolve the motion and structural evolution of these current systems. The Greenland stations in combination with the other GEM funded stations deployed in Canada, permit us to observe these phenomena over a sufficient region as to identify their generation location and resolve their motion and spatial evolution as the propagate. These data and the proposed research are important to understanding the physics of the processes which couple energy and momentum from the solar wind to the magnetosphere and ionosphere, the physics of the magnetospheric boundary layer and the mapping of boundary layer phenomena to the high-latitude ionosphere.