CEDAR: Atmospheric Neutral Density Dynamics through Meteor Observations
CEDAR:通过流星观测的大气中性密度动力学
基本信息
- 批准号:1920383
- 负责人:
- 金额:$ 60.96万
- 依托单位:
- 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:2019-06-15 至 2023-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This award is an experimental effort to further develop a new measurement technique for estimating neutral densities by using radar observations of meteor trajectories. As meteoroids enter the Earth's atmosphere, they experience deceleration due to atmospheric drag and form meteors that radar can observe, providing a source of information that can independently determine the neutral density of the atmosphere at altitudes of 80 to 140 km. Measurements of neutral densities in this region are very challenging experimentally and this work will fill this gap by using a novel technique. Knowledge of neutral densities is important since low-Earth-orbit satellites experience atmospheric drag that is strongly dependent on densities. The continued accumulation of data characterizing this meteoroid population would also provide improved risk assessment to spacecraft operators and to ground-based users of satellite data. This work will also provide research topics for new graduate students and results from this work will be incorporated into undergraduate and graduate courses in Aeronautics and Astronautics.The latitudinal and temporal variation of neutral density in the mesosphere-lower-thermosphere region between 80 and 140 km in altitude will be studied by conducting a simultaneous meteor radar campaign at two geographically distinct radar facilities and applying a novel statistical technique to derive neutral density values from the detected meteor trajectories. These measurements of atmospheric neutral density will be compared against existing atmospheric models to characterize the origins of short time density variations and to assess the extent that they will couple to density enhancements in the upper atmosphere. The resulting measurements of total neutral density will complement measurements of temperature, winds, plasma, and individual metallic species, and provides an alternative source of data to existing neutral density measurements that are sparse or that depend on different physical assumptions.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.
该奖项是一项试验性努力,旨在进一步开发一种新的测量技术,通过对流星轨迹的雷达观测来估计中性密度。当流星体进入地球大气层时,它们会经历大气阻力的减速,并形成雷达可以观测到的流星,提供了一个信息源,可以独立确定80至140公里高度的大气中性密度。测量这一区域的中性密度在实验上是非常具有挑战性的,这项工作将通过使用一种新的技术来填补这一空白。了解中性密度很重要,因为低地球轨道卫星的大气阻力与密度有很大关系。继续积累表征这一流星体群体的数据还将改进对航天器操作员和卫星数据地面用户的风险评估。这项工作还将为新的研究生提供研究课题,这项工作的成果将被纳入航空航天本科生和研究生课程。将通过在两个不同地理位置的雷达设施上同时进行流星雷达运动,并应用一种新的统计技术从探测到的流星轨迹得出中性密度值,来研究80至140公里高度的中层-低热层区域中性密度的纬度和时间变化。这些对大气中性密度的测量将与现有的大气模型进行比较,以确定短期密度变化的来源,并评估它们将在多大程度上与高层大气的密度增强相耦合。由此产生的总中性密度的测量将补充对温度、风、等离子体和单个金属物种的测量,并提供现有中性密度测量的替代数据来源,这些测量是稀疏的或取决于不同的物理假设。该奖项反映了NSF的法定使命,并通过使用基金会的智力优势和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Meteoroid orbit determination from HPLA radar data
根据 HPLA 雷达数据确定流星体轨道
- DOI:10.1016/j.icarus.2022.115144
- 发表时间:2022
- 期刊:
- 影响因子:3.2
- 作者:Blanchard, Jared T.;Lee, Nicolas;Elschot, Sigrid
- 通讯作者:Elschot, Sigrid
Meteor Head Echo Analyses From Concurrent Radar Observations at AMISR Resolute Bay, Jicamarca, and Millstone Hill
根据 AMISR Resolute Bay、Jicamarca 和 Millstone Hill 的同步雷达观测进行流星头回波分析
- DOI:10.1029/2022ja030709
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Hedges, T.;Lee, N.;Elschot, S.
- 通讯作者:Elschot, S.
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Sigrid Elschot其他文献
Self-consistent charging of complex objects in flowing plasma: Implementation and analysis in WarpX
流动等离子体中复杂物体的自洽充电:在WarpX中的实现与分析
- DOI:
10.1016/j.cpc.2025.109680 - 发表时间:
2025-09-01 - 期刊:
- 影响因子:3.400
- 作者:
Ashwyn Sam;Sigrid Elschot - 通讯作者:
Sigrid Elschot
Collisionless electrostatic particle-in-cell simulation of rapid target charging along an unbiased dielectric surface due to hypervelocity impact plasmas
由于超高速碰撞等离子体沿无偏压电介质表面的快速目标充电的无碰撞静电粒子模拟
- DOI:
10.1016/j.ijimpeng.2025.105360 - 发表时间:
2025-10-01 - 期刊:
- 影响因子:5.700
- 作者:
Nancy Diallo;Raymond Lau;Nicolas Lee;Sigrid Elschot - 通讯作者:
Sigrid Elschot
Sigrid Elschot的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Sigrid Elschot', 18)}}的其他基金
Collaborative Research: A Simulation and Theoretical Analysis of Meteor Evolution over Scales Ranging from Sub-microseconds to Minutes
合作研究:亚微秒到分钟尺度的流星演化模拟与理论分析
- 批准号:
2301645 - 财政年份:2023
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
Characterization of Meteoroids and Meteors through Simulations and Remote Sensing Using High-Power Large-Aperture Radars
使用高功率大孔径雷达通过模拟和遥感表征流星体和流星
- 批准号:
2048349 - 财政年份:2021
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
GEM: Extending the Capabilities of CubeSats for Measuring Radiation Belt Precipitation
GEM:扩展 CubeSat 测量辐射带降水的能力
- 批准号:
1602607 - 财政年份:2016
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Collaborative Research: CubeSat: A U.S. CubeSat Constellation for the QB50 Mission (QBUS)
合作研究:CubeSat:用于 QB50 任务 (QBUS) 的美国 CubeSat 星座
- 批准号:
1242912 - 财政年份:2014
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Global Impact of Lightning-Generated VLF Waves on Radiation Belt Electron Losses
闪电产生的甚低频波对辐射带电子损耗的全球影响
- 批准号:
1139321 - 财政年份:2013
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
CEDAR: Thunderstorm Coupling to the Lower Ionosphere through Electromagnetic, Acoustic, and Gravity Waves
CEDAR:雷暴通过电磁波、声波和重力波与低电离层耦合
- 批准号:
1243176 - 财政年份:2013
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
CAREER: Meteor and Meteoroid Characterization Using High-Power Large-Aperture Radar Data
职业:使用高功率大孔径雷达数据表征流星和流星体
- 批准号:
1056042 - 财政年份:2011
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
Collaborative Research: CEDAR--Tomographic Array for Lightning and Ionospheric Studies (TALIS)
合作研究:CEDAR——用于闪电和电离层研究的断层扫描阵列 (TALIS)
- 批准号:
1025262 - 财政年份:2009
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Collaborative Research: CEDAR--Tomographic Array for Lightning and Ionospheric Studies (TALIS)
合作研究:CEDAR——用于闪电和电离层研究的断层扫描阵列 (TALIS)
- 批准号:
0836510 - 财政年份:2009
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
相似海外基金
Collaborative Research: Non-Linearity and Feedbacks in the Atmospheric Circulation Response to Increased Carbon Dioxide (CO2)
合作研究:大气环流对二氧化碳 (CO2) 增加的响应的非线性和反馈
- 批准号:
2335762 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
PIRE: DUST stimulated drawn-down of atmospheric CO2 as a trigger for Northern Hemisphere Glaciation
PIRE:灰尘刺激大气中二氧化碳的减少,引发北半球冰川作用
- 批准号:
2420451 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Collaborative Research: Non-Linearity and Feedbacks in the Atmospheric Circulation Response to Increased Carbon Dioxide (CO2)
合作研究:大气环流对二氧化碳 (CO2) 增加的响应的非线性和反馈
- 批准号:
2335761 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
Terahertz-frequency sensors for atmospheric chemistry and space research (renewal)
用于大气化学和空间研究的太赫兹频率传感器(更新)
- 批准号:
MR/Y011775/1 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Fellowship
EMBRACE-AGS-Seed: Decadal Trends of Atmospheric Ethane - Building Capacity for Trace Gas Analysis and Modeling at Portland State University
EMBRACE-AGS-Seed:大气乙烷的十年趋势 - 波特兰州立大学痕量气体分析和建模能力建设
- 批准号:
2409413 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
Evaluating the Atmospheric Dynamics of Nitrate and Sulfate in Southern New England in Response to Emission Regulations
评估新英格兰南部硝酸盐和硫酸盐的大气动态以响应排放法规
- 批准号:
2414561 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Effect of Condensed-Phase Photochemistry on Absorption Coefficients and Phase State of Atmospheric Organic Aerosol Particles
凝聚相光化学对大气有机气溶胶颗粒吸收系数和相态的影响
- 批准号:
2334731 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Standard Grant
Collaborative Research: Characterizing Atmospheric Tropical-waves of the Lower Stratosphere with Reel-down Atmospheric Temperature Sensing for Strateole-2--RATS Chasing CATS!
合作研究:利用 Strateole-2 的卷轴大气温度传感来表征平流层下部的大气热带波——RATS 追逐 CATS!
- 批准号:
2335083 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Collaborative Research: Characterizing Atmospheric Tropical-waves of the Lower Stratosphere with Reel-down Atmospheric Temperature Sensing for Strateole-2--RATS Chasing CATS!
合作研究:利用 Strateole-2 的卷轴大气温度传感来表征平流层下部的大气热带波——RATS 追逐 CATS!
- 批准号:
2335082 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Continuing Grant
Facilities for Atmospheric Boundary Layer Evaluation and Testing
大气边界层评估和测试设施
- 批准号:
LE240100116 - 财政年份:2024
- 资助金额:
$ 60.96万 - 项目类别:
Linkage Infrastructure, Equipment and Facilities