A Program of Analysis of the Multiexperiment Data from the Cusp Observatory at Svalbard, Norway: A GEM Project

该提案要求支持在斯瓦尔巴群岛朗伊尔城天文台继续收集和分析多仪器数据。该站点配备了全天照相机、子午线扫描光度计、日冕计、感应磁力计和磁通门磁力计，非常适合研究高纬度磁层边界的尖端和圈定。朗伊尔城天文台在北半球是独一无二的，因为它位于北半球冬季正午时分的明暗面。从十月底到二月初，天空足够暗，可以进行光学观测。该网站已经成功运营了十多年。对多仪器数据的研究有助于为单仪器测量无法提供的解释提供一个背景。虽然磁力计可以用来确定台站的位置，关于主要的高纬度电流系统，光学仪器识别与尖端附近的各个区域有关的辐射。到目前为止，还不清楚这些辐射和相关的地磁脉动代表着什么过程；它们可以绘制边界或显示受磁层边界限制的过程。更大的问题是这个提议的目标。在这个冬季，这项活动将使我们能够及时研究尖端地区的大规模特征及其发展。与磁层顶的脉冲事件有关的弧和波被检测到，在进行积极的识别之前需要进行研究。当与卫星数据相结合时，这套数据就足以开始识别与北极光尖端有关的极光形式的电离层特征。

This proposal requests support for the continued collection and analysis of multi-instrument data at the Longyearbyen, Svalbard Observatory. Instrumented with an all-sky camera, a meridian scanning photometer, riometer, induction and fluxgate magnetometers, this site is well suited for studies of the cusp and delineation of high latitude magnetospheric boundaries. The Longyearbyen observatory is unique in the northern hemisphere in lying on the dark side of the terminator at noon during northern winter. The sky is dark enough to allow optical observation from late October to early February. The site has been operated successfully for more than a decade. Studies of the multi instrument data helps provide a context for interpretation unavailable for single instrument measurements. While the magnetometers can be used to identify the station location with regard to the major high-latitude current systems, the optical instruments identify emissions associated with the various regions near the cusp. As yet, it is not clear what processes the emissions and associated geomagnetic pulsations represent; they may map boundaries or show the processes confined by magnetospheric boundaries. The larger question is the goal of this proposal. During this winter season, this campaign will allow us to study large scale features of the cusp region and their development in time. Associated with impulsive events at the magnetopause, arcs and waves are detected which require study before a positive identification can be made. When combined with satellite data, the data suite is sufficient to begin the process of identifying ionospheric signatures of auroral forms associated the the cusp.