CEDAR: Post Doc: Signal Processing of O[II] Emission Spectra from Observations

CEDAR：博士后：O[II] 观测发射光谱的信号处理

• 批准号: 0725239
• 负责人: Susan Nossal
• 金额: $ 18.33万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0725239&HistoricalAwards=false
• 关键词: CEDAR; Post; Doc; Signal; Processing

This project is to investigate the source of a newly discovered terrestrial airglow feature at 3276 and 3279 angstroms attributed to the [OII] (O+) doublet (2D - 4S) emission. Observations have been and will be made with a new class of highly sensitive interference spectrometer called the Spatial Heterodyne Spectrometer (SHS). The airglow feature of interest, first detected in 1958 but only observed a few times since then, is believed to originate in the F region of the ionosphere, and the project aims to confirm the identification and investigate the emission's possible use as a tracer of ion chemistry and electron density. The dearth of observations is due to the faintness of the feature. The source of the ions is due to either photoelectrons impacting the sunlit upper atmosphere or precipitating electrons. Most recently, these terrestrial [OII] emission lines were inadvertently detected as part of a Galactic [OII] interstellar medium program underway at the University of Wisconsin's Pine Bluff Observatory. The SHS instrument will be used to study the details of the O+ emission at different viewing geometries and over differing geophysical conditions with unprecedented sensitivity, contributing to observational diagnostics of ionospheric constituents. The resulting database will be used to investigate where the [OII ] emission is generated and what are its effects on the ionosphere. Satellite data such as that from TIMED-GUVI will be examined for possible usefulness in interpreting the ground-based data acquired during the project. One of the broader impacts of this research is the development of spectral analysis codes that will be applicable to aeronomy data. Another is the application of a new spectroscopic technique to aeronomy applications as well as providing assistance to Galactic research studies. Outreach activities are planned in which the SHS data will be used for presentations to interest elementary and high school students in atmospheric research.

该项目是为了研究新发现的陆网气球特征的来源，归因于[OII]（O+）Doublet（2d -4s）发射的3279 Angstroms。 观察已经并且将使用一类新的高度敏感干扰光谱仪进行，称为空间异差光谱仪（SHS）。 感兴趣的气球特征于1958年首次检测到，但自那时以来仅观察到几次，据信起源于电离层的F区域，该项目旨在确认识别并研究发射的可能用作离子的示踪剂。化学和电子密度。 观察的缺乏是由于该功能的昏暗性。 离子的来源是由于光电子影响阳光高层大气或沉淀电子。 最近，这些地面[OII]发射线被无意中被视为威斯康星大学松布式虚张声势天文台正在进行的银河[OII]星际培养基计划的一部分。 SHS仪器将用于研究不同观看几何形状和不同地球物理条件下的O+发射的细节，并具有前所未有的灵敏度，这有助于观察到电离层成分的观察性诊断。 所得数据库将用于研究[OII]发射的何处以及它对电离层的影响。 将检查诸如定时guvi的卫星数据，以解释项目在项目中获取的基于地面数据的可能性。 这项研究的更广泛的影响之一是开发光谱分析代码，该代码适用于航空数据。 另一个是将新的光谱技术应用于航空应用，并为银河研究提供帮助。 计划进行外展活动，其中SHS数据将用于演讲，以使小学和高中生对大气研究感兴趣。