Collaborative Research: Multi-instrumented, Two-Dimensional (2D) Studies of Equatorial Spread F

合作研究：赤道扩散 F 的多仪器二维 (2D) 研究

• 批准号: 1915925
• 负责人: Carlos Martinis
• 金额: $ 9.16万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1915925&HistoricalAwards=false
• 关键词: Collaborative; Research; Multi; instrumented; Two

This research will develop new observational capabilities by reactivating two instruments near the magnetic equator, a region which hosts a unique and puzzling set of phenomena in the near-Earth plasma environment. These phenomena range from large-scale plasma fountains that transport plasma away from the equator to small-scale disturbances in the plasma density that adversely affect satellite communication and navigation. The focus of the current investigation is on the equatorial spread F or ESF, a multi-scale plasma structure whose origins are poorly understood. This project will investigate generation of ESF by conducting two-dimensional, multi-instrumented observations of plasma conditions at the magnetic equatorial site of the Jicamarca Radio Observatory (JRO). This project will develop a better understanding of fundamental plasma processes including plasma instabilities and plasma-neutral coupling at low geomagnetic latitudes which are known to be a significant source of plasma disturbances that can disrupt radio communication channels. Further collaborative linkages between partner institutions in the US and an international partner (JRO) will be developed through this work. It will also promote teaching and stimulate integration of research and education by directly supporting one post-doctoral researcher and one graduate student, and by the Principal Investigator incorporating results from this research into classroom activities. The work will involve (1) a repair of a new radar system and airglow imager at JRO, (2) conducting 2D radio and optical observations of ESF at JRO, (3) ESF propagation analysis to determine whether F-region structures are generated locally or transported from another location, (4) comparing ESF occurrence and strength with plasma drift measurements to evaluate a hypothesis that post-midnight, quiet-time ESF can develop under conditions of weakening downward drifts, and (5) analysis of collocated radio and optical observations to study the causal relationship between large-scale plasma structures and ESF in the late-evening and post-midnight sectors.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项研究将通过在磁赤道附近重新激活两种仪器来发展新的观察能力，该区域在近地等离子体环境中拥有独特而令人困惑的现象集。这些现象范围从将血浆从赤道运输到血浆密度的小规模干扰的大规模等离子体喷泉范围会对卫星的通信和导航产生不利影响。当前研究的重点是赤道扩散F或ESF，这是一种多尺度的等离子体结构，其起源知之甚少。该项目将通过在JICAMARCA无线电天文台（JRO）的磁赤道位点进行二维的，多功能的观测来研究ESF的产生。该项目将更好地理解基本的等离子体过程，包括低地磁纬度的等离子体不稳定性和血浆中性耦合，这是可以破坏无线电通信渠道的血浆干扰的重要来源。这项工作将开发美国与国际合作伙伴（JRO）之间的合作伙伴机构之间的进一步合作联系。它还将通过直接支持一名博士后研究人员和一名研究生，并通过将本研究的结果纳入课堂活动的结果来促进和刺激研究和教育的整合。这项工作将涉及（1）在JRO上修复新的雷达系统和气流成像仪，（2）在JRO上进行2D无线电和ESF的光学观察，（3）ESF繁殖分析以确定F-Region结构是在本地生成或从其他位置运输的F-Region结构，（4）比较ESF的可能性和强度，以使ESF的发生和强度衡量，以评估质量的降级，以置于质量范围，以使质量降低了一定的时间，该级别的时间是一定的，以置于质量的范围，并将其评估为一定程度，以置于质量范围内，以确定一I.向下漂移减弱的条件以及（5）分析在夜间晚期和米夜后的大规模等离子体结构与ESF之间的因果关系的分析，这反映了NSF的法规任务，并被认为是通过基金会的知识优点和广泛的评估来进行评估，并值得通过评估来进行评估。