NSWP: High Frequency (HF) Doppler Radar for Low Latitude Studies
NSWP: High Frequency (HF) Doppler Radar for Low Latitude Studies
批准号:
0852393
负责人:
Geoffrey Crowley
金额:
$29.96万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2008
资助国家:
美国
项目状态:
已结题
起止时间:
2008-07-01 至 2011-06-30
中文摘要
在秘鲁Jicamarca的非相干散射雷达设施中放置了一台多普勒高频(HF)雷达,目的是解开导致赤道等离子体气泡(EPBs)开始的过程,并进而解开穿越电离层的无线电信号闪烁,包括GPS信号。对f区峰以下的电离层扰动的光谱和传播进行了表征,并确定了它们与Jicamarca观测到的epb的关系。在太阳极小期条件下,确定了中性风反转前离子密度增强时垂直离子漂移的变异性,并确定了这种变异性与赤道等离子体气泡发生的关系。中性风调节epb发生的程度,以及可能超越其他有效触发机制的程度,也可以使用附近法布里-珀罗干涉仪的数据进行评估。确定的f区电离层峰值以下的等离子体扰动、垂直离子漂移的可变性、中性风和EPB爆发之间的关系最终被用于预测EPB的产生,以及相关的射电闪烁。
英文摘要
A Doppler High Frequency (HF) radar is placed at the Jicamarca Peru Incoherent Scatter Radar Facility for the purpose of untangling the processes that lead to the onset of equatorial plasma bubbles (EPBs), and in turn to scintillations of radio signals traversing the ionosphere, including GPS signals. The spectra and propagation of ionospheric perturbations just below the F-region peak are characterized, and their relationship to EPBs observed at Jicamarca is determined. The variability of vertical ion drift in the enhanced ion density preceding the neutral wind reversal is determined during solar minimum conditions, and the relationship of that variability to equatorial plasma bubble onset is determined. The extent to which neutral winds modulate the occurrence of EPBs, and possibly override otherwise effective triggering mechanisms is also evaluated using data from nearby Fabry-Perot interferometers. The determined relationships between plasma perturbations below the F-region ionospheric peak, variability of the vertical ion drift, the neutral wind, and EPB onset are finally used to in an attempt to predict EPB generation, along with associated radio scintillations.
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财政年份:2013
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依托单位:
Collaborative Research: RAPID--Dynamic Ionosphere CubeSat Experiment (DICE) Operations and Data Processing
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Collaborative Research: Dayside Field-Aligned Current (FAC) Source Regions of Extreme Poynting Flux Events and the Response of the Magnetosphere-Ionosphere-Thermosphere System
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批准号:1144062
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资助金额:$22.79万
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财政年份:2012
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负责人:Geoffrey Crowley
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依托单位:
Collaborative Research: CEDAR: Large Amplitude Variations & Instabilities due to Strong Interactions between Tides & Planetary Waves in the Upper Mesosphere and Lower Therm
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批准号:1042239
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资助金额:$7.5万
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财政年份:2011
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负责人:Geoffrey Crowley
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依托单位:
Collaborative Research: Observations and Modeling of Acoustic Waves in the Ionosphere and Lower Thermosphere
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批准号:1001088
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项目类别:Continuing Grant
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资助金额:$15.43万
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财政年份:2010
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负责人:Geoffrey Crowley
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依托单位:
CubeSat: Dynamic Ionosphere Cubesat Experiment (DICE)
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批准号:0838059
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项目类别:Standard Grant
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资助金额:$119.95万
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财政年份:2009
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依托单位:
GEM: High Latitude M-I Coupling Studies Using Data Assimilation
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批准号:0703335
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资助金额:$29.1万
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财政年份:2007
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依托单位:
Formation and Breakdown of High-Latitude Density Cells in Response to Ion Drag Forcing
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批准号:0332307
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项目类别:Continuing Grant
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资助金额:$0.0万
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财政年份:2004
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负责人:Geoffrey Crowley
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依托单位:
Collaborative Research: CEDAR: Multi-Instrument Studies of Patches and Blobs in the Nightside Polar Ionososphere
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批准号:0228458
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项目类别:Continuing Grant
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资助金额:$13.2万
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财政年份:2003
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负责人:Geoffrey Crowley
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依托单位:
M-I Coupling: Quantifying High Latitude Electric Field and Conductance Variability
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批准号:0101825
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资助金额:$19.0万
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财政年份:2001
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负责人:Geoffrey Crowley
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依托单位:
Global Joule Heating
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批准号:9806600
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项目类别:Continuing Grant
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资助金额:$29.7万
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财政年份:1998
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负责人:Geoffrey Crowley
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依托单位:
Validation of the NCAR Thermosphere/Ionosphere/ Electrodynamic General Circulation Model (TIEGCM)
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批准号:9696234
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项目类别:Continuing Grant
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资助金额:$5.66万
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财政年份:1996
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负责人:Geoffrey Crowley
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依托单位:
Validation of the NCAR Thermosphere/Ionosphere/ Electrodynamic General Circulation Model (TIEGCM)
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批准号:9505423
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项目类别:Continuing Grant
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资助金额:$4.66万
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财政年份:1995
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负责人:Geoffrey Crowley
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依托单位:
CEDAR: Formation Mechanisms for Neutral Density Cells in the Lower Thermosphere at High Latitudes
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批准号:9416300
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项目类别:Standard Grant
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资助金额:$2.99万
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财政年份:1995
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负责人:Geoffrey Crowley
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依托单位:
Realistice Thermospheric Simulation for ETS-GITCAD Campaign, September 1984
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批准号:8901131
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项目类别:Standard Grant
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资助金额:$9.37万
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财政年份:1989
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负责人:Geoffrey Crowley
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依托单位:
国内基金
海外基金
转录延伸因子参与粗糙脉孢菌生物钟基因frequency表达调控分子机制的研究
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批准号:--
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项目类别:面上项目
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资助金额:58万元
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批准年份:2021
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负责人:何群
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依托单位: