CEDAR: Sunlit Investigations of Soft Arcs and the Cusp Boundary with Coordinated ISR and HiRISE Diagnostics

CEDAR：利用协调 ISR 和 HiRISE 诊断对软弧和尖点边界进行阳光调查

• 批准号: 0437100
• 负责人: Richard Doe
• 金额: --
• 依托单位: SRI International
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-12-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0437100&HistoricalAwards=false
• 关键词: CEDAR; Sunlit; Investigations; Soft; Arcs

The investigators will study magnetosheath-ionosphere interaction by probing electron density, electron temperature and oxygen emission structures in the dayside high-latitude ionosphere. Long-term, ground-based studies of the cusp boundary and dayside auroral arcs can greatly advance our understanding of magnetic merging by measuring the morphological response of the cusp to solar wind forcing, and by examining the relationship of the cusp boundary to the location and motion of soft arcs. This study will also provide an opportunity to study the energetics of dayside auroral arcs. By merging measurements of plasma density and 630 nm emissions with a solar ultraviolet photochemical model, the investigators will extend studies of daylit aurora to a low energy regime heretofore undetectable with conventional radar and optical tools. This study will help to understand how the morphology of the cusp responds to solar forcing, the relationship between daylit arcs and the cusp boundary, and the way in which the motion of dayside arcs is controlled by the interplanetary magnetic field. The observations will be made with a spectrograph and an incoherent scatter radar located at Sondrestrom, Greenland. A web-based real-time archive of daytime auroral measurements, linked to the existing repository of nightside images from the Sondrestrom all-sky imager, will be provided as a resource for future collaborators. This web archive will also contain a descriptive narrative and links to satellite images aimed at the general public, so as to increase awareness of auroral light emission as a round-the-clock phenomena.

调查人员将通过探测昼侧高纬度电离层的电子密度、电子温度和氧发射结构来研究磁鞘-电离层的相互作用。对尖点边界和昼侧极光弧进行长期的地面研究，可以通过测量尖点对太阳风强迫的形态反应，并通过研究尖点边界与软弧的位置和运动的关系，大大提高我们对磁合并的理解。这项研究还将提供一个机会，研究日侧极光弧的能量学。通过将等离子体密度和630 nm发射的测量结果与太阳紫外光化学模型相结合，研究人员将把日光极光的研究扩展到迄今为止用传统雷达和光学工具无法检测到的低能量区域。这项研究将有助于了解尖点的形态如何响应太阳强迫，白昼弧和尖点边界之间的关系，以及白昼弧的运动是如何被行星际磁场控制的。观测将使用位于格陵兰Sondrestrom的光谱仪和非相干散射雷达进行。将提供一个与Sondrestrom全天空成像仪的夜侧图像现有储存库相连的日间极光测量网上实时档案，作为今后合作者的一种资源。这一网络档案还将包含一个描述性说明和针对一般公众的卫星图像链接，以提高对极光发射这一昼夜现象的认识。