GEM MACCS-East: A Magnetometer Array for Cusp and Cleft Studies

在与奥格斯堡学院的共同努力下，建议继续操作和分析最近安装的磁通门磁强计MACCS阵列的数据，这些磁通门磁强计位于加拿大北极的尖角/裂缝纬度（750°至800°）。1992年和1993年夏季，在北极东部的小社区部署了8个磁力计。这8个观测站在对磁层边界层的地面观测最有价值的纬度区域的磁地方时跨度近5小时，并将阿拉斯加和加拿大西部的现有磁力计站点连接到西部，将格陵兰岛和巴芬岛的站点连接到东部。此外，这里建议在三个标准的加拿大观测站（雷索特、剑桥湾和贝克湖）增加数据记录器。这将允许从这些站点获得1小时的数据，并定期将这些数据与MACCS数据库相结合，从而有效地将MACCS阵列向西延长一个小时。MACCS阵列的目的是研究电离层电流、等离子体流以及与磁层尖端和邻近区域相关的波。与在同一地区开始运行的雷达系统相结合，这些磁力计将提供尖端对流电动力学的高分辨率二维数据。MACCS数据还包含许多高纬度亚暴特征。随着GEM计划开始其亚暴活动，建议使用MACCS数据来研究与北向IMF相关的小型收缩椭圆形亚暴，以及常规亚暴的恢复阶段，在此期间活动向MACCS阵列的两极移动。

It is proposed to continue to operate and analyze data from the recently installed MACCS array of fluxgate magnetometers located at cusp/cleft latitudes (75o to 80o in arctic Canada in a joint effort with Augsburg College. During the summers of 1992 and 1993 8 magnetometers were deployed at small communities in the eastern arctic. These eight observatories span nearly 5 hours in magnetic local time in the latitude region most valuable for ground-based observations of the magnetospheric boundary layer, and serve to connect existing magnetometer sites in Alaska and western Canada to the west and sites on Greenland and Baffin Island to the east. In addition, it is proposed here to add data loggers at three standard Canadian observatories (Resolute, Cambridge Bay and Baker Lake). This would allow to obtain 1 s data from these sites and routinely combine this data with the MACCS data base so effectively extending the MACCS array another hour to the west. The purpose of the MACCS array is to study ionospheric currents, plasma flows, and waves associated with the magnetospheric cusp and neighboring regions. In association with the radar systems beginning to operate in this same area, these magnetometers will provide high resolution, two-dimensional data on the electrodynamics of cusp convection. The MACCS data also contain numerous high latitude substorm signatures. As the GEM program begins its substorm campaign, it is proposed to use MACCS data to study the small, contracted oval substorms associated with northward IMF, and the recovery phase of regular substorms during which the activity moves poleward over the MACCS array.