Highly Sensitive Optical Observations of Aurcraand Upper Atmosphere in the Canadian Arctic

2005年，加拿大在Resolute Bay（RSB）和Athabasca （Athabasca）的两个观测站安装了两台全天气光/极光成像仪，观测到极帽等离子体斑块（ATH），在RSB，我们总是在向南的IMF期间，通过二维互相关分析，我们确定了斑块的速度矢量，即电离层对流矢量，与IMF- by和-Bz的变化具有高度的相关性。孤立质子弧和稳定极光红（SAR）弧位于非椭圆的赤道方向。孤立质子弧的出现与在ATH同时测量的pc1地磁脉动高度相关，表明电磁离子回旋波（EMK）波与等离子体顶和环电流附近的质子相互作用。即使没有地磁暴，在次暴膨胀期之后出现的SAR弧也存在类似的无波相互作用。这些观测显示了从地面站监测磁层过程的良好能力，这将有助于未来的卫星项目，如THEMES、ERG和Scope/Xscale

Two all-sky airglow/aurora imagers were installed at two Canadian stations at Resolute Bay(RSB)and Athabasca observed polar-cap plasma patches almost always(ATH))in 2005, At RSB, we always during southward IMF periods, From two-dimensional cross-correlation analyses, we determined velocity vectors of the patches, which indicates the ionospheric convection vector, that showed high correlation with the IMF-By and -Bz variations. At ATH, we often observed isolated proton arcs and Stable Auroral Red (SAR) arcs, which were located equatorward of the amoral oval The appearance of the isolated proton arcs was highly correlated with the Pc 1 geomagnetic pulsations measured simultaneously at ATH, suggesting interactions between the electromagnetic ion cyclotron (EMK) waves and protons in the vicinity of the plasmapause and the ring current. Similar interactions without waves were also suggested for the SAR arcs, which appeared after the substorm expansion phase even without geomagnetic storm. These observations show promising capability monitor magnetospheric processes from the ground stations, whit would contribute to the future satellite projects such as THEMES, ERG, and Scope/Xscale