GUVI

Global UltraViolet Imager

GUVI Biblio





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Found 38 entries in the Bibliography.


Showing entries from 1 through 38


2022

Plasma-neutral gas interactions in various space environments: Assessment beyond simplified approximations as a Voyage 2050 theme

In the White Paper, submitted in response to the European Space Agency (ESA) Voyage 2050 Call, we present the importance of advancing our knowledge of plasma-neutral gas interactions, and of deepening our understanding of the partially ionized environments that are ubiquitous in the upper atmospheres of planets and moons, and elsewhere in space. In future space missions, the above task requires addressing the following fundamental questions: (A) How and by how much do plasma-neutral gas interactions influence the re-distribu ...

Yamauchi, Masatoshi; De Keyser, Johan; Parks, George; Oyama, Shin-ichiro; Wurz, Peter; Abe, Takumi; Beth, Arnaud; Daglis, Ioannis; Dandouras, Iannis; Dunlop, Malcolm; Henri, Pierre; Ivchenko, Nickolay; Kallio, Esa; Kucharek, Harald; Liu, Yong; Mann, Ingrid; Marghitu, Octav; Nicolaou, Georgios; Rong, Zhaojin; Sakanoi, Takeshi; Saur, Joachim; Shimoyama, Manabu; Taguchi, Satoshi; Tian, Feng; Tsuda, Takuo; Tsurutani, Bruce; Turner, Drew; Ulich, Thomas; Yau, Andrew; Yoshikawa, Ichiro;

Published by: Experimental Astronomy      Published on: mar

YEAR: 2022     DOI: 10.1007/s10686-022-09846-9

Collision cross-section; Future missions; Low-energy; Neutral gas; Plasma; Voyage 2050

Local Persistent Ionospheric Positive Responses to the Geomagnetic Storm in August 2018 Using BDS-GEO Satellites over Low-Latitude Regions in Eastern Hemisphere

We present the ionospheric disturbance responses over low-latitude regions by using total electron content from Geostationary Earth Orbit (GEO) satellites of the BeiDou Navigation Satellite System (BDS), ionosonde data and Swarm satellite data, during the geomagnetic storm in August 2018. The results show that a prominent total electron content (TEC) enhancement over low-latitude regions is observed during the main phase of the storm. There is a persistent TEC increase lasting for about 1–2 days and a moderately positive d ...

Tang, Jun; Gao, Xin; Yang, Dengpan; Zhong, Zhengyu; Huo, Xingliang; Wu, Xuequn;

Published by: Remote Sensing      Published on: jan

YEAR: 2022     DOI: 10.3390/rs14092272

BDS-GEO; differential code biases; geomagnetic storm; Ionospheric disturbance; TEC

Multiresolution Data Assimilation for Auroral Energy Flux and Mean Energy Using DMSP SSUSI, THEMIS ASI, and An Empirical Model

We apply a multiresolution Gaussian process model (Lattice Kriging) to combine satellite observations, ground‐based observations, and an empirical auroral model, to produce the

Wu, Haonan; Tan, Xiyan; Zhang, Qiong; Huang, Whitney; Lu, Xian; Nishimura, Yukitoshi; Zhang, Yongliang;

Published by: Space Weather      Published on:

YEAR: 2022     DOI: 10.1029/2022SW003146

Interhemispheric Asymmetries in Ionospheric Electron Density Responses During Geomagnetic Storms: A Study Using Space-Based and Ground-Based GNSS and AMPERE Observations

We utilize Total Electron Content (TEC) measurements and electron density (Ne) retrieval profiles from Global Navigation Satellite System (GNSS) receivers onboard multiple Low Earth Orbit (LEO) satellites to characterize large-scale ionosphere-thermosphere system responses during geomagnetic storms. We also analyze TEC measurements from GNSS receivers in a worldwide ground-based network. Measurements from four storms during June and July 2012 (boreal summer months), December 2015 (austral summer month), and March 2015 (equin ...

Swarnalingam, N.; Wu, D.; Gopalswamy, N.;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2022     DOI: 10.1029/2021JA030247

Behaviors of Ionospheric Topside Ion Density, Ion Temperature, and Electron Temperature During the 20 November 2003 Superstorm

We identified a few new storm‐time ionospheric phenomena by analyzing disturbances in topside ion density, electron temperature, and ion temperature at ∼840 km altitude measured

Huang, Chao-Song; Zhang, Yongliang; Wang, Wenbin; Lin, Dong; Wu, Qian;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2022     DOI: 10.1029/2022JA030468

2021

First Results From the Retrieved Column O/N2 Ratio From the Ionospheric Connection Explorer (ICON): Evidence of the Impacts of Nonmigrating Tides

In near-Earth space, variations in thermospheric composition have important implications for thermosphere-ionosphere coupling. The ratio of O to N2 is often measured using far-UV airglow observations. Taking such airglow observations from space, looking below the Earth s limb allows for the total column of O and N2 in the ionosphere to be determined. While these observations have enabled many previous studies, determining the impact of nonmigrating tides on thermospheric composition has proved difficult, owing to a small con ...

England, Scott; Meier, R.; Frey, Harald; Mende, Stephen; Stephan, Andrew; Krier, Christopher; Cullens, Chihoko; Wu, Yen-Jung; Triplett, Colin; Sirk, Martin; Korpela, Eric; Harding, Brian; Englert, Christoph; Immel, Thomas;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2021     DOI: 10.1029/2021JA029575

airglow; atmospheric composition; Atmospheric tides; thermosphere

FTA: A Feature Tracking Empirical Model of Auroral Precipitation

The Feature Tracking of Aurora (FTA) model was constructed using 1.5 years of Polar Ultraviolet Imager data and is based on tracking a cumulative energy grid in 96 magnetic local time (MLT) sectors. The equatorward boundary, poleward boundary, and 19 cumulative energy bins are tracked with the energy flux and the latitudinal position. With AE increasing, the equatorward boundary moves to lower latitudes everywhere, while the poleward boundary moves poleward in the 2300–0300 MLT region and equatorward in other MLT sectors. ...

Wu, Chen; Ridley, Aaron; DeJong, Anna; Paxton, Larry;

Published by: Space Weather      Published on:

YEAR: 2021     DOI: 10.1029/2020SW002629

Auroral Precipitation Model; cumulative energy bins; data-model comparisons; M-I coupling; statistical analyses

A Comparative Study of Ionospheric Day-To-Day Variability Over Wuhan Based on Ionosonde Measurements and Model Simulations

Ionospheric day-to-day variability is essential for understanding the space environment, while it is still challenging to properly quantify and forecast. In the present work, the day-to-day variability of F2 layer peak electron densities (NmF2) is examined from both observational and modeling perspectives. Ionosonde data over Wuhan station (30.5°N, 114.5°E; 19.3°N magnetic latitude) are compared with simulations from the specific dynamics Whole Atmosphere Community Climate Model with thermosphere and ionosphere eXtension ...

Zhou, Xu; Yue, Xinan; Liu, Han-Li; Lu, Xian; Wu, Haonan; Zhao, Xiukuan; He, Jianhui;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2021     DOI: 10.1029/2020JA028589

Ionosphere; day-to-day variability; ionosonde; NmF2; TIEGCM; WACCM-X

Low-Latitude Zonal Ion Drifts and Their Relationship With Subauroral Polarization Streams and Auroral Return Flows During Intense Magnetic Storms

We analyze horizontal plasma drifts measured by the Defense Meteorological Satellite Program satellites during two intense magnetic storms. It is found, for the first time, that westward plasma flows associated with subauroral polarization streams (SAPS) in the dusk-evening sector penetrate continuously to equatorial latitudes. The westward ion drifts between subauroral and equatorial latitudes occur nearly simultaneously. The latitudinal profile of the westward ion drifts at low latitudes (approximately within ±30° magnet ...

Huang, Chao-Song; Zhang, Yongliang; Wang, Wenbin; Lin, Dong; Wu, Qian;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2021     DOI: 10.1029/2021JA030001

Electric field; Ionosphere; ionospheric plasma drift; penetration electric field; Subauroral Polarization Streams; thermospheric wind

Interaction Between an EMSTID and an EPB in the EIA Crest Region Over China

Few observations investigated the interaction between an electrical medium-scale traveling ionospheric disturbance (EMSTID) and an equatorial plasma bubble (EPB). This paper presents another interaction between a southwestward propagating EMSTID and an eastward drifting EPB in the equatorial ionization anomaly (EIA) crest region of China. When the EMSTID and the EPB touched each other, several depletions of the EMSTID (EPB) showed the eastward (westward) velocity disturbances of the EPB (EMSTID) depletions. Besides, phase el ...

Sun, Longchang; Xu, JiYao; Zhu, Yajun; Xiong, Chao; Yuan, Wei; Wu, Kun; Hao, Yongqiang; Chen, Gang; Yan, Chunxiao; Wang, Zhihua; Zhao, Xiukuan; Luo, Xiaomin;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2021     DOI: 10.1029/2020JA029005

airglow; EIA crest region; Interaction between MSTID and EPB; Nighttime plasma density enhancement; Polarization of postmidnight EPB; VHF radar echoes and range spread F

2020

Impacts of Lower Thermospheric Atomic Oxygen on Thermospheric Dynamics and Composition Using the Global Ionosphere Thermosphere Model

Malhotra, Garima; Ridley, Aaron; Marsh, Daniel; Wu, Chen; Paxton, Larry; Mlynczak, Martin;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2020     DOI:

2019

Annual and Semiannual Oscillations of Thermospheric Composition in TIMED/GUVI Limb Measurements

The Global UltraViolet Imager (GUVI) onboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite provides a data set of vertical thermospheric composition (O, N2, and O2 densities) and temperature profiles from 2002\textendash2007. Even though GUVI sampling is limited by orbital constraint, we demonstrated that the GUVI data set can be used to derive the altitude profiles of the amplitudes and phases of annual oscillation (AO) and semiannual oscillation (SAO), thereby pro ...

Yue, Jia; Jian, Yongxiao; Wang, Wenbin; Meier, R.R.; Burns, Alan; Qian, Liying; Jones, M.; Wu, Dong; Mlynczak, Martin;

Published by: Journal of Geophysical Research: Space Physics      Published on: 04/2019

YEAR: 2019     DOI: 10.1029/2019JA026544

Understanding the Effects of Earth's Lower Atmosphere on Upper Ionospheric-Thermospheric Semi Annual Oscillation-Using GITM, MSIS and WACCM-X

The datasets that are used in these study for comparisons are GPS, GUVI, COSMIC and GRACE observations.

Malhotra, Garima; Ridley, Aaron; Marsh, Daniel; Wu, Chen; Paxton, Larry;

Published by:       Published on:

YEAR: 2019     DOI:

2018

Modeling study of the ionospheric responses to the quasi-biennial oscillations of the sun and stratosphere

Wang, Jack; Tsai-Lin, Rong; Chang, Loren; Wu, Qian; Lin, Charles; Yue, Jia;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 06/2018

YEAR: 2018     DOI: 10.1016/j.jastp.2017.07.024

Seasonal Variation Analysis of Thermospheric Composition in TIMED/GUVI Limb Measurements

Knowledge of thermospheric variability is essential to the understanding and forecasting of ionospheric behavior and space weather. As well, thermospheric density variability is a vital ingredient for prediction of space objects orbital changes and the lifetime of spacecraft. The Global UltraViolet Imager (GUVI) onboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite provides the first global dataset of thermosphere composition (O, N2 and O2 densities) and temperature vertical profiles from 2 ...

Yue, Jia; Meier, Robert; Jian, Yongxiao; Yee, Jeng-Hwa; Wu, Dong; Russell, James; Wang, Wenbin; Burns, Alan;

Published by: 2018 Triennial Earth-Sun Summit (TESS      Published on:

YEAR: 2018     DOI:

Understanding the Effects of Lower Boundary variations on the Ionosphere-Thermosphere System using GITM and WACCM-X

Malhotra, Garima; Ridley, Aaron; Marsh, Daniel; Wu, Chen; Paxton, Larry;

Published by:       Published on:

YEAR: 2018     DOI:

2017

Understanding the Effects of Lower Boundary Conditions and Eddy Diffusion on the Ionosphere-Thermosphere System

Malhotra, Garima; Ridley, Aaron; Marsh, Daniel; Wu, Chen; Paxton, Larry;

Published by:       Published on:

YEAR: 2017     DOI:

2016

Ionospheric F2 layer responses to total solar eclipses at low and mid-latitude

In this article, we presented ionospheric F2 responses to total solar eclipses on the basis of the data obtained from five (5) equatorial/low-latitude and twenty-seven (27) mid-latitude ionosonde stations, which are within the obscuration percentage of 50\textendash100\% of the path of the total solar eclipses progression. Statistically, the diurnal changes in the F2 layer peak height hmF2 and electron density NmF2, as well as the latitudinal and hemispheric dependence and the contribution of both magnetic and solar activ ...

Adekoya, B.J.; Chukwuma, V.U.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 02/2016

YEAR: 2016     DOI: 10.1016/j.jastp.2016.01.006

Equatorial/low-latitude; Hemisphere; mid-latitude; NmF2 and hmF2; Solar ionizing radiation

2015

Observations and modeling of UHF-band scintillation occurrence probability over the low-latitude region of China during the maximum activity of solar cycle 24

The climatological characteristics of UHF-band scintillations over the low-latitude region of China were investigated by analyzing the observations recorded at three stations of our

Zhang, Hongbo; Liu, Yumei; Wu, Jian; Xu, T; Sheng, D;

Published by:       Published on:

YEAR: 2015     DOI: 10.5194/angeo-33-93-2015

2014

Meteor radar wind over Chung-Li (24.9 N, 121 E), Taiwan, for the period 10--25 November 2012 which includes Leonid meteor shower: Comparison with empirical model and satellite measurements

The neutral winds in the mesosphere and lower thermosphere (MLT) region are measured by a newly installed meteor trail detection system (or meteor radar) at Chung-Li, Taiwan, for the period 10\textendash25 November 2012, which includes the Leonid meteor shower period. In this study, we use the 3 m field-aligned plasma irregularities in the sporadic E (Es) region in combination with the International Geomagnetic Reference Field model to calibrate the system phase biases such that the true posit ...

Su, C.; Chen, H.; Chu, Y.; Chung, M.; Kuong, R.; Lin, T.; Tzeng, K.; Wang, C; Wu, K.; Yang, K.;

Published by: Radio Science      Published on: 08/2014

YEAR: 2014     DOI: 10.1002/2013RS005273

HWM07; radar meteor wind; tide

Quasi two day wave-related variability in the background dynamics and composition of the mesosphere/thermosphere and the ionosphere

Dissipating planetary waves in the mesosphere/lower thermosphere (MLT) region may cause changes in the background dynamics of that region, subsequently driving variability throughout the broader thermosphere/ionosphere system via mixing due to the induced circulation changes. We report the results of case studies examining the possibility of such coupling during the northern winter in the context of the quasi two day wave (QTDW)\textemdasha planetary wave that recurrently grows to large amplitudes from the summer MLT duri ...

Chang, Loren; Yue, Jia; Wang, Wenbin; Wu, Qian; Meier, R.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 06/2014

YEAR: 2014     DOI: 10.1002/jgra.v119.610.1002/2014JA019936

composition; Ionosphere; mesosphere; quasi two day wave; thermosphere

2013

GNSS radio occultation (RO) derived electron density quality in high latitude and polar region: NCAR-TIEGCM simulation and real data evaluation

Global Navigation Satellite System (GNSS) based radio occultation (RO) technique has shown powerful ability in ionospheric electron density profiling in the past decade. The most frequently used Abel inversion method in electron density retrieval has some biases because of the used spherical symmetry assumption. Our previous series simulations and evaluations mainly concentrated in the middle and low latitude regions have shown some systematical bias especially in lower altitude of low latitude region. However, the RO der ...

Yue, Xinan; Schreiner, William; Kuo, Ying-Hwa; Wu, Qian; Deng, Yue; Wang, Wenbin;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 06/2013

YEAR: 2013     DOI: 10.1016/j.jastp.2013.03.009

Abel inversion; AURORA; COSMIC; Electron density; GNSS radio occultation; TIEGCM

2011

Verification of large-scale rapid transport in the lower thermosphere: Tracking the exhaust plume of STS-107 from launch to the Antarctic

Niciejewski, R.; Skinner, W.; Cooper, M.; Marshall, A.; Meier, R.; Stevens, M.; Ortland, D.; Wu, Q.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.1029/2010JA016277

2010

Correlative Observations with Space-Borne Direct Doppler Wind Instruments of the Rapid Transport of Shuttle Exhaust Plumes

Niciejewski, R; Meier, RR; Stevens, MH; Skinner, WR; Cooper, M; Marshall, A; Ortland, DA; Wu, Q;

Published by:       Published on:

YEAR: 2010     DOI:

Integrating the Sun-Earth System for the Operational Environment (ISES-OE)

Lean, J.; Huba, J.; McDonald, S.; Slinker, S.; Drob, D.; Emmert, J.; Meier, R.; Picone, J.; Joyce, G.; Krall, J.; Stephan, A.; Roach, K.; Knight, H.; Plunkett, S.; Wu, C.-C.; Wood, B.; Wang, Y.-M.; Howard, R.; Chen, J.; Bernhardt, P.; Fedder, J.;

Published by:       Published on:

YEAR: 2010     DOI:

The ground calibration of far ultraviolet scanning imaging spectrometer (FUSIS)

The far ultraviolet scanning imaging spectrometer (FUSIS) is used to measure the composition and distribution of the main molecules and atoms in the Earth s upper atmosphere. It is an important instrument in investigation of the physical and chemical processes in the Earth s upper atmosphere. FUSIS works between 120nm to 180nm, its spectral resolution is better than 1.0nm and its spatial resolution is 8 pixels. This paper describes a kind of ground calibration method and facility of FUSIS. The FUV light is invisible, so all ...

Wu, Yan; Tang, Yi; Liu, Jianpeng; Zhang, Zhige; Ni, Guoqiang;

Published by:       Published on:

YEAR: 2010     DOI: 10.1117/12.870475

Mesospheric Impact on Thermosphere and Ionosphere

Wu, Qian; Roble, Raymond; Foster, Benjamin;

Published by: 38th COSPAR Scientific Assembly      Published on:

YEAR: 2010     DOI:

2009

Spectral analysis of ionospheric electron density and mesospheric neutral wind diurnal nonmigrating tides observed by COSMIC and TIMED satellites

Wu, Quian; Solomon, SC; Kuo, Y-H; Killeen, TL; Xu, JiYao;

Published by: Geophysical research letters      Published on:

YEAR: 2009     DOI:

Design of FUV imaging spectrometer based on crossed Czerny-Turner structure

This article describes the characteristics of the far ultraviolet (FUV) radiation and its applications in the space weather s research and prediction. The FUV imaging spectrometer is irreplaceable to get the FUV radiation data of the earth s upper atmosphere. Some key technologies of FUV spectrometer are analyzed respectively, including window materials, FUV light source, FUV detectors and FUV coating, which offer theoretical foundation for FUV imaging spectrometer. The paper presents a FUV band imaging spectrometer s optica ...

Wu, Yan; Tang, Yi; Ni, Guoqiang; Sheng, Yunlong; Wang, Yongtian; Zeng, Lijiang;

Published by:       Published on:

YEAR: 2009     DOI: 10.1117/12.806967

space weather; far ultraviolet; Imaging spectrometer; crossed Czerny-Turner system; optical design

2008

Impact of terrestrial weather on the upper atmosphere

Fuller-Rowell, TJ; Akmaev, RA; Wu, F; Anghel, A; Maruyama, N; Anderson, DN; Codrescu, MV; Iredell, M; Moorthi, S; Juang, H-M; , others;

Published by: Geophysical Research Letters      Published on:

YEAR: 2008     DOI:

2007

A climatology of nonmigrating semidiurnal tides from TIMED Doppler Interferometer (TIDI) wind data

Oberheide, J.; Wu, Q.; Killeen, T.L.; Hagan, M.E.; Roble, R.G.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: Jan-12-2007

YEAR: 2007     DOI: 10.1016/j.jastp.2007.05.010

Overview of TIMED CEDAR observations showing the MLTI system response to changing drivers from solar maximum to solar minimum

Kozyra, JU; Crowley, G; Doe, RA; Mlynczak, MG; Paxton, LJ; Skinner, WR; Solomon, SC; Talaat, E; Woods, TN; Wu, Q; , others;

Published by:       Published on:

YEAR: 2007     DOI:

2006

Geophysical Monograph SeriesRecurrent Magnetic Storms: Corotating Solar Wind StreamsResponse of the upper/middle atmosphere to coronal holes and powerful high-speed solar wind streams in 2003

Kozyra, J.; Crowley, G.; Emery, B.; Fang, X.; Maris, G.; Mlynczak, M.; Niciejewski, R.; Palo, S.; Paxton, L.; Randall, C.; Rong, P.-P.; Russell, J.; Skinner, W.; Solomon, S.; Talaat, E.; Wu, Q.; Yee, J.-H.;

Published by:       Published on:

YEAR: 2006     DOI: 10.1029/GM16710.1029/167GM24

TIMED Doppler interferometer (TIDI) observations of migrating diurnal and semidiurnal tides

Wu, Qian; Killeen, TL; Ortland, DA; Solomon, SC; Gablehouse, RD; Johnson, RM; Skinner, WR; Niciejewski, RJ; Franke, SJ;

Published by: Journal of atmospheric and solar-terrestrial physics      Published on:

YEAR: 2006     DOI:

2005

Global patterns of Joule heating in the high-latitude ionosphere

A compiled empirical global Joule heating (CEJH) model is described in this study. This model can be used to study Joule heating patterns, Joule heating power, potential drop, and polar potential size in the high-latitude ionosphere and thermosphere, and their variations with solar wind conditions, geomagnetic activities, the solar EUV radiation, and the neutral wind. It is shown that the interplanetary magnetic field (IMF) orientation and its magnitude, the solar wind speed, AL index, geomagnetic K ...

Zhang, X.; Wang, C.; Chen, T.; Wang, Y.; Tan, A.; Wu, T.; Germany, G.; Wang, W.;

Published by: Journal of Geophysical Research      Published on: 12*2005

YEAR: 2005     DOI: 10.1029/2005JA011222

electric fields; magnetosphere/ionosphere interaction; Modeling and forecasting; particle precipitation; polar cap ionosphere; solar radiation and cosmic ray effects

2004

A Statistical Model of Electron Fluxes into the Earth s Atmosphere

, Sharber; Frahm, FA; Wuest, MP; Crowley, G; Jennings, JK;

Published by:       Published on:

YEAR: 2004     DOI:

2003

Empirical Modeling of Global Electron Energy Input During the April 2002 Storms

, Sharber; Frahm, RA; Wuest, MP; Crowley, G; Jennings, JK;

Published by:       Published on:

YEAR: 2003     DOI:

2002

CEDAR 2018

Malhotra, Garima; Ridley, Aaron; Marsh, Daniel; Wu, Chen; Paxton, Larry;

Published by:       Published on:

YEAR: 2002     DOI:



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