| 项目编号: | 1552161
|
| 项目名称: | CEDAR: Traveling Ionospheric Disturbances (TIDs) Excited by Tropospheric Phenomena and their Effect on Plasma Instabilities |
| 作者: | Cesar Valladares
|
| 承担单位: | University of Texas at Dallas
|
| 批准年: | 2016
|
| 开始日期: | 2016-09-15
|
| 结束日期: | 2019-08-31
|
| 资助金额: | 374080
|
| 资助来源: | US-NSF
|
| 项目类别: | Standard Grant
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
|
| 英文关键词: | mstid
; tid
; medium-scale tid
; plasma conductivity
; equatorial plasma bubble
; plasma structure
; ionospheric disturbance
; plasma irregularity
|
| 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. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/90929
|
| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Cesar Valladares. CEDAR: Traveling Ionospheric Disturbances (TIDs) Excited by Tropospheric Phenomena and their Effect on Plasma Instabilities. 2016-01-01.
|
|
|