CEDAR: Traveling Ionospheric Disturbances (TIDs) Excited by Tropospheric Phenomena and their Effect on Plasma Instabilities

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项目编号	1552161
	CEDAR: Traveling Ionospheric Disturbances (TIDs) Excited by Tropospheric Phenomena and their Effect on Plasma Instabilities
	Cesar Valladares
主持机构	University of Texas at Dallas
项目开始年	2016
	2016-09-15
项目结束日期	2019-08-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	374080(USD)
国家	美国
语种	英语
英文摘要	In this project, features in the Earth's ionosphere called traveling ionospheric disturbances (TIDs) will be studied by analyzing ground- and satellite-based measurements. The ground-based measurements include total electron current (TEC) measurements collected by a few hundred ground-based GPS receivers distributed across South and Central America and the Caribbean region in the LISN network (Low-Latitude ionospheric sensor network). It also includes ionosondes, Fabry-Perot Interferometers, and the incoherent scatter radars at Jicamarca and Arecibo. The outcomes of this research will be a better understanding of the variability and characteristics of medium-scale TIDs (MSTIDs) and TEC depletions during different ionospheric and thermospheric conditions. The study also aims to resolve whether there exists a link between tropical storms and the formation of MSTIDs. The occurrence of plasma irregularities poses a prominent natural hazard to communication, navigation and high precision pointing systems. The conjugate properties of MSTIDs and plasma structures seen at mid-latitudes under a variety of different ionosphere and thermosphere conditions and for magnetically quiet and active conditions will be investigated. Specifically, the following questions will be addressed: What is the control that the latitudinal variability of the plasma conductivity and the propagation direction of atmospheric gravity waves exert on the MSTIDs? What is the initiation mechanism of mid latitude depletions? Do MSTIDs map to conjugate locations during disturbed conditions? Can MSTIDs or TIDs influence the latitudinal (and then altitude) extension of equatorial plasma bubbles? During special events, such as large magnetic storms, TEC values collected by the majority of GPS receivers that exist in North America will be also be used to study poleward expansions of TEC depletions and MSTIDs. Electric fields and density observations gathered with several instruments on-board C/NOFS, DMSP and SWARM satellites will complement the observations.
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文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/70417
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Cesar Valladares.CEDAR: Traveling Ionospheric Disturbances (TIDs) Excited by Tropospheric Phenomena and their Effect on Plasma Instabilities.2016.