CEDAR: Evaluating Dayside Auroral Hydrogen Emission as an Aeronomic Signature of Magnetospheric Processes

CEDAR：评估白天极光氢排放作为磁层过程的航空特征

• 批准号: 9814006
• 负责人: Charles Deehr
• 金额: $ 5万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-02-15 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814006&HistoricalAwards=false
• 关键词: CEDAR; Evaluating; Dayside; Auroral; Hydrogen

The investigators will establish the spatial and temporal relationship between dayside hydrogen emissions and plasma reconnection sites at the magnetospheric boundary. The technique is to observe the Doppler spectral profile of dayside auroral hydrogen in three directions from a station situated under the dayside aurora. The objective will be accomplished by aiming three large-aperture spectrometers in different directions under the dayside aurora at Longyearbyen, Svalbard, to measure the hydrogen emission spectral profile simultaneously near the ionospheric foot point of reconnection events. From these spectra, and other supporting optical data, the investigtors will deduce the location and the extent of the reconnection event on the dayside magnetopause, and the direction of convection. If this method proves to be successful, an extended array of hydrogen emission observations from the ground or from space could produce a measure of the total reconnection rate and a picture of the reconnection process at the dayside magnetopause.

研究人员将建立昼侧氢排放与磁层边界等离子体重连点之间的空间和时间关系。 该技术是从位于阳面极光下的一个观测站观测阳面极光氢在三个方向上的多普勒光谱剖面。 实现这一目标的方法是，在斯瓦尔巴特群岛朗伊尔城的昼侧极光下，将三台大孔径光谱仪对准不同方向，同时测量重联事件电离层脚点附近的氢发射光谱剖面。 根据这些光谱和其他支持光学数据，磁感应器将推断出向阳面磁层顶重联事件的位置和程度，以及对流的方向。 如果这种方法被证明是成功的，从地面或从空间进行的一系列氢发射观测可以测量总的重联率，并描绘出向阳侧磁层顶的重联过程。