CEDAR: Winds Over Africa - Investigation of Thermospheric Dynamics via Multi-site, Multi-instrument Observations

CEDAR：非洲上空的风 - 通过多地点、多仪器观测研究热层动力学

• 批准号: 1651298
• 负责人: Jonathan Makela
• 金额: $ 22.49万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-15 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651298&HistoricalAwards=false
• 关键词: CEDAR; Winds; Over; Africa; Investigation

Winds in the thermosphere strongly influence viscosity and electrification properties. These parameters in turn modulate drag forces, and the propagation of radio waves. This proposal aims to enhance a baseline set of thermospheric wind measurements over the African continent. These data will be used together with similar measurements over North and South America to elucidate the physics underlying their longitudinal variations. Knowledge and understanding of thermospheric winds are important for predicting spacecraft trajectories, and for seamless operation of global navigation and communication systems.Under this award, the PI will install a new Imaging Fabry-Perot Interferometer (FPI) in South Africa to supplement an existing array of FPIs, covering equatorial- to mid-latitudes in Africa, and longitudes spanning the globe. Research goals are to a) understand the longitudinal variations in thermosphere winds; b) provide a quantitative assessment of the effects of atmospheric scattering on wind measurements; and c) validate the widely-used Horizontal Wind Model over Africa. This proposal will provide winds in a vastly undersampled area (the southern hemisphere) that will corroborate the upcoming Ionospheric CONnection (ICON) explorer wind measurements. Additional broader impacts include augmenting the CEDAR (Madrigal) database, and graduate student training at UIUC and in Africa.

热层中的风强烈影响粘度和电气化特性。这些参数依次调节阻力力和无线电波的传播。该提案旨在增强非洲大陆上热流风测量的基线集。这些数据将与北美和南美的类似测量一起使用，以阐明其纵向变化的物理学。对热层风的知识和理解对于预测航天器轨迹以及全球导航和通信系统的无缝操作至关重要。在此奖项下，PI将在南非安装新的成像Fabry-Perot干涉仪（FPI），以补充现有的FPIS，以覆盖一系列的FPIS，覆盖非洲的公平至中期，范围是非洲和较长的范围。研究目标是a）了解热球风的纵向变化； b）对大气散射对风测量的影响进行定量评估； c）验证非洲广泛使用的水平风模型。该提案将在大量采样区域（南半球）中提供风，这些风将证实即将到来的电离层连接（ICON）Explorer风能测量值。其他更广泛的影响包括增加雪松（Madrigal）数据库，以及在UIUC和非洲的研究生培训。

项目成果

Validation of ICON‐MIGHTI Thermospheric Wind Observations: 1. Nighttime Red‐Line Ground‐Based Fabry‐Perot Interferometers

ICON–MIGHTI 热层风观测的验证： 1. 夜间红色–线地面–基于法布里–珀罗干涉仪

• DOI: 10.1029/2020ja028726
• 发表时间: 2021
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Makela, Jonathan J.;Baughman, Matthew;Navarro, Luis A.;Harding, Brian J.;Englert, Christoph. R.;Harlander, John M.;Marr, Kenneth D.;Benkhaldoun, Zouhair;Kaab, Mohamed;Immel, Thomas J.
• 通讯作者: Immel, Thomas J.

Thermospheric Neutral Winds Above the Oukaimeden Observatory: Effects of Geomagnetic Activity

• DOI: 10.1029/2019ja027383
• 发表时间: 2020-07
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: A. Loutfi;A. Bounhir;F. Pitout;Z. Benkhaldoun;J. Makela

A climatology of the nighttime thermospheric winds over Sutherland, South Africa

南非萨瑟兰夜间热层风的气候学

• DOI: 10.1016/j.asr.2021.10.015
• 发表时间: 2021
• 期刊: Advances in Space Research
• 影响因子: 2.6
• 作者: Ojo, Taiwo T.;Katamzi-Joseph, Zama T.;Chu, Kristina T.;Grawe, Matthew A.;Makela, Jonathan J.
• 通讯作者: Makela, Jonathan J.