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Found 531 entries in the Bibliography.
Showing entries from 251 through 300
| 2014 |
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Investigation of the Tidal Signatures in the Thermosphere Using the TIMED/GUVI Data
Kil, Hyosub; Paxton, Larry; Zhang, Yongliang; Kwak, Young-Sil; Lee, Woo; Published by: Published on: |
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Composition and the Winter Anomaly
Burns, Alan; Wang, Wenbin; Qian, Liying; Solomon, Stanley; Zhang, Yongliang; Paxton, Larry; Thayer, Jeffrey; Published by: Published on: |
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Paxton, LJ; Schaefer, RK; Zhang, Y; Bust, GS; Kil, H; Published by: Published on: |
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Ionospheric imaging using merged ultraviolet airglow and radio occultation data The Limb-imaging Ionospheric and Thermospheric Extreme-ultraviolet Spectrograph (LITES) and GPS Radio Occultation and Ultraviolet Photometry-Colocated (GROUP-C) experiments are being considered for flight aboard the Space Test Program Houston 5 (STP-H5) experiment pallet to the International Space Station (ISS). LITES is a compact imaging spectrograph that makes one-dimensional images of atmospheric and ionospheric ultraviolet (60-140 nm) airglow above the limb of the Earth. The LITES optical design is advantageous in tha ... Stephan, Andrew; Budzien, Scott; Finn, Susanna; Cook, Timothy; Chakrabarti, Supriya; Powell, Steven; Psiaki, Mark; Published by: Published on: YEAR: 2014 DOI: 10.1117/12.2061420 |
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Simultaneous observations of Birkeland currents by the constellation of Iridium satellites and N2 Lyman\textendashBirge\textendashHopfield (LBH) auroral emissions measured by the Global Ultraviolet Imager (GUVI) onboard the Thermosphere, Ionosphere, and Mesosphere Energetics and Dynamics (TIMED) satellite are used to establish relationships between large-scale upward field-aligned currents and electron precipitation during stable current configurations. The electron precipitation was inferred from GUVI data using a statis ... Korth, Haje; Zhang, Yongliang; Anderson, Brian; Sotirelis, Thomas; Waters, Colin; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2014 DOI: 10.1002/2014JA019961 Birkeland Currents; Auroral Emissions; electron precipitation; Current-Precipitation Relationship; Current-Voltage Relationship |
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Maggiolo, Romain; Fontaine, Dominique; Hosokawa, Keisuke; Maes, Lukas; Zhang, Yongliang; Fear, Robert; Cumnock, Judy; Kozlovsky, Alexander; Kullen, Anita; Milan, Steve; , others; Published by: Published on: |
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Gjerloev, Jesper; Schaefer, Robert; Paxton, Larry; Zhang, Yongliang; Published by: Published on: |
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Ionospheric Data Assimilation from a Data Provider's Perspective
Schaefer, Robert; Paxton, Larry; Bust, G; Zhang, Yongliang; Romeo, Giuseppe; Comberiate, Joseph; Gelinas, Lynette; Published by: Published on: |
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EMIC Wave Induced Radiation Belt Losses and Proton Aurora
Erlandson, Robert; Paxton, Larry; Zhang, Yongliang; Schaefer, Robert; Published by: Published on: |
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On transpolar arc formation correlated with solar wind entry at high latitude magnetosphere
Mailyan, Bagrat; Shi, Quanqi; Maggiolo, Romain; Zong, Qiugang; Fu, SuiYan; Zhang, Yongliang; Yao, Zhonghua; Sun, W; Published by: Published on: |
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Specification of Auroral Ionospheric Conductances Using SSUSI and GUVI UV Imagery
Paxton, Larry; Zhang, Yongliang; Schaefer, Robert; Weiss, Michele; Miller, Ethan; Published by: Published on: |
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Thermospheric Composition Variability and Its Coupling to the Ionosphere I
Zhang, Yongliang; Paxton, Larry; Fuller-Rowell, Timothy; Knipp, Delores; Published by: Published on: |
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Newell, Patrick; Liou, Kan; Zhang, Yongliang; Sotirelis, Thomas; Paxton, Larry; Mitchell, Elizabeth; Published by: Published on: |
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The zonal motion of equatorial plasma bubbles relative to the background ionosphere
Kil, Hyosub; Lee, Woo; Kwak, Young-Sil; Zhang, Yongliang; Paxton, Larry; Milla, Marco; Published by: Journal of Geophysical Research: Space Physics Published on: |
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The zonal motion of equatorial plasma bubbles relative to the background ionosphere
Kil, Hyosub; Lee, Woo; Kwak, Young-Sil; Zhang, Yongliang; Paxton, Larry; Milla, Marco; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Ground and satellite observations of multiple sun-aligned auroral arcs on the duskside
Hosokawa, Keisuke; Maggiolo, Romain; Zhang, Yongliang; Fear, Robert; Fontaine, Dominique; Cumnock, Judy; Kullen, Anita; Milan, Stephen; Kozlovsky, Alexander; Echim, Marius; , others; Published by: Published on: |
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Storm-Time Behaviors of the Thermospheric O/N2 and NO Variations
Zhang, Yongliang; Paxton, Larry; Morrison, Daniel; Kil, Hyosub; Marsh, Daniel; Published by: Published on: |
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Schaefer, Robert; Paxton, Larry; Romeo, Giuseppe; Wolven, Brian; Zhang, Yongliang; Comberiate, Joseph; Published by: Published on: |
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Multi-instrument observations of multiple auroral arcs in the duskside polar cap region
Hosokawa, Keisuke; Maggiolo, Romain; Zhang, Yongliang; Fear, Rob; Fontaine, Dominique; Cumnock, Judy; Kullen, Anita; Milan, Steve; Kozlovsky, Alexander; Echim, Marius; Published by: Published on: |
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Equatorial broad plasma depletions associated with the enhanced fountain effect
Lee, Woo; Kil, Hyosub; Kwak, Young-Sil; Paxton, Larry; Zhang, Yongliang; Galkin, Ivan; Batista, Inez; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Near real-time global auroral observations and their application to IRI
Zhang, Yongliang; Paxton, Larry; Bilitza, Dieter; Published by: 40th COSPAR Scientific Assembly Published on: |
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Forcing of the Coupled Ionosphere-Thermosphere (IT) System During Magnetic Storms
Huang, Cheryl; Huang, Yanshi; Su, Yi-Jiun; Sutton, Eric; Hairston, Marc; Coley, Robin; Doornbos, Eelco; Zhang, Yongliang; Published by: Published on: |
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The International Reference Ionosphere 2012--a model of international collaboration
Bilitza, Dieter; Altadill, David; Zhang, Yongliang; Mertens, Chris; Truhlik, Vladimir; Richards, Phil; McKinnell, Lee-Anne; Reinisch, Bodo; Published by: Journal of Space Weather and Space Climate Published on: |
| 2013 |
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On the fast zonal transport of the STS-121 space shuttle exhaust plume in the lower thermosphere Meier et al. (2011) reported rapid eastward transport of the STS-121 space shuttle (launch: July 4, 2006) main engine plume in the lower thermosphere, observed in hydrogen Lyman α images by the GUVI instrument onboard the TIMED satellite. In ord ... Yue, Jia; Liu, Han-Li; Meier, R.R.; Chang, Loren; Gu, Sheng-Yang; , Russell; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-03-2013 YEAR: 2013 DOI: 10.1016/j.jastp.2012.12.017 |
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The effect of the 135.6 nm emission originated from the ionosphere on the TIMED/GUVI O/N 2 ratio The column number density ratio of atomic oxygen to molecular nitrogen (O/N2\ ratio) provided by the Global Ultraviolet Imager (GUVI) onboard the Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (TIMED) satellite has been used as a diagnostic of the thermospheric neutral composition. However, a recent study claimed that the GUVI O/N2\ ratio is not a pure thermospheric parameter in low latitudes during periods of low geomagnetic activity. This study quantifies the O/N2 ... Kil, H.; Lee, W.; Shim, J.; Paxton, L.J.; Zhang, Y.; Published by: Journal of Geophysical Research: Space Physics Published on: Jan-02-2013 YEAR: 2013 DOI: 10.1029/2012JA018112 |
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[1]\ We examine the consequence of enhanced atomic oxygen (OI) 135.6 nm emissions due to the recombination of O+ with electrons on the column number density ratio of atomic oxygen to molecular nitrogen (O/N2 ratio) provided by Global Ultraviolet Imager (GUVI) on board the Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics satellite. GUVI O/N2 ratio is derived from the measurements of OI 135.6 nm and N2 Lyman-Birge-Hopfield airglow emissions. The OI 135.6 nm emissi ... Lee, Woo; Kil, Hyosub; Paxton, Larry; Zhang, Yongliang; Shim, Ja; Published by: Journal of Geophysical Research: Space Physics Published on: 12/2013 YEAR: 2013 DOI: 10.1002/2013JA019132 |
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Ionospheric symmetry caused by geomagnetic declination over North America We describe variations in total electron content (TEC) in the North American sector exhibiting pronounced longitudinal progression and symmetry with respect to zero magnetic declination. Patterns were uncovered by applying an empirical orthogonal function (EOF) decomposition procedure to a 12 year ground-based American longitude sector GPS TEC data set. The first EOF mode describes overall average TEC, while the strong influence of geomagnetic declination on the midlatitude ionosphere is found in the second EOF mode (or t ... Zhang, Shun-Rong; Chen, Ziwei; Coster, Anthea; Erickson, Philip; Foster, John; Published by: Geophysical Research Letters Published on: 10/2014 YEAR: 2013 DOI: 10.1002/grl.v40.2010.1002/2013GL057933 geomagnetic field; midlatitude ionosphere; thermospheric winds; total electron content |
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The solar wind effects on the Earth\textquoterights environment are studied for their basic scientific values and crucial practical impacts on technological systems. This paper reports results of Total Electron Content (TEC) changes during two successive ionospheric storms of 7\textendash12 November 2004 using GPS data derived from dual frequency receivers located at African equatorial and midlatitudes. In the geographic coordinate system, equatorial TEC variability is considered over Libreville (0.36\textdegreeN, 9.67\te ... Habarulema, John; McKinnell, Lee-Anne; a, Dalia; Zhang, Yongliang; Seemala, Gopi; Ngwira, Chigomezyo; Chum, Jaroslav; Opperman, Ben; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 09/2013 YEAR: 2013 DOI: 10.1016/j.jastp.2013.05.008 African equatorial and midlatitude TEC dynamics; Magnetic storms; TIDs |
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Ionospheric ion temperature Ti is an excellent approximation to neutral temperature Tn in the thermosphere, especially for altitudes below 300 km. This analysis of long-term Ti trends in the F region over different local times is based on a database of incoherent scatter radar (ISR) observations spanning more than three solar cycles during 1968\textendash2006 at Millstone Hill and represents an extended effort to a prior study focusing on noon-time only. This study provides important information for understanding the diff ... Published by: Journal of Geophysical Research: Space Physics Published on: 06/2013 YEAR: 2013 DOI: 10.1002/jgra.50306 global change; incoherent scatter radar; ionospheric temperature; long-term trend; Millstone Hill |
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Nightside midlatitude ionospheric arcs: TIMED/GUVI observations [1]\ Midlatitude arcs (MLA) are the phenomenon of the nightside enhancements of ionospheric electron density at 20\textdegree-45\textdegree magnetic latitudes in both hemispheres. We investigate the occurrence of MLA and its dependence on season using the Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics/Global Ultraviolet Imager (TIMED/GUVI) O I 135.6 nm intensity data between March 2008 and March 2012. The 135.6 nm emission is mainly caused by radiant recombination between O+ ions and electron ... Zhang, Yongliang; Paxton, Larry; Kil, Hyosub; Published by: Journal of Geophysical Research: Space Physics Published on: 06/2013 YEAR: 2013 DOI: 10.1002/jgra.50327 |
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This paper is the first study to employ a three-dimensional physics-based ionosphere model, SAMI3, coupled with the National Center for Atmospheric Research Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) and Global Scale Wave Model to simulate the mesospheric and lower thermospheric tidal effects on the development of midlatitude summer nighttime anomaly (MSNA). Using this coupled model, the diurnal variation of MSNA electron densities at 300 km altitude is simulated on both June solstice (day ... Chen, C.; Lin, C.; Chang, L.; Huba, J.; Lin, J.; Saito, A.; Liu, J; Published by: Journal of Geophysical Research: Space Physics Published on: 06/2013 YEAR: 2013 DOI: 10.1002/jgra.50340 |
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Statistical comparison of isolated and non-isolated auroral substorms The present study compares isolated and non-isolated substorms in terms of their global morphology and energy deposition. The analysis is based on a list of geomagnetic substorm onsets identified with magnetometer data from SuperMAG and published previously by Newell and Gjerlove (2011a). Isolated substorms are defined as those with separation of two consecutive onsets no less than 3 h. The auroral data are obtained from the global ultraviolet imager (GUVI) on board the TIMED satellite and are rebinned into typical magnet ... Liou, Kan; Newell, Patrick; Zhang, Yong-Liang; Paxton, Larry; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2013 YEAR: 2013 DOI: 10.1002/jgra.50218 |
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Multi-Periodic Auroral and Thermospheric Variations in 2006
Zhang, Yongliang; Paxton, L.; Kil, Hyosub; Published by: Terrestrial, Atmospheric and Oceanic Sciences Published on: 04/2013 YEAR: 2013 DOI: 10.3319/TAO.2012.09.20.01(SEC) |
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Auroral emissions observed in the far-ultraviolet wavelength range are compared with measurements of the coincident precipitating electrons and ions that produce the emissions in a large-scale correlative study. The auroral emissions and particle precipitation are observed with the Special Sensor Ultraviolet Spectrographic Imager and SSJ5 detectors, respectively, both onboard the DMSP F16 satellite. Coincident observations along the same magnetic field line in the Northern Hemisphere are assembled from two consecutive win ... Sotirelis, Thomas; Korth, Haje; Hsieh, Syau-Yun; Zhang, Yongliang; Morrison, Daniel; Paxton, Larry; Published by: Journal of Geophysical Research: Space Physics Published on: 03/2013 YEAR: 2013 DOI: 10.1002/jgra.50157 |
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Multi-Instrument Observations at High Latitudes
Miller, E; Paxton, L; Schaefer, RK; Weiss, M; Wolven, BC; Zhang, Y; Published by: Published on: |
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Retrieving ionospheric electron density profile from FUV spectral remote sensing measurements
WANG, Jing; Tang, Yi; ZHANG, Zhi-Ge; ZHENG, Xu-Li; Ni, Guo-qiang; Published by: Chinese Journal of Geophysics Published on: |
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Observing the mid-and low-latitude ionosphere-global UV remote sensing
Paxton, LJ; Kil, H; Miller, ES; Comberiate, J; Schaefer, RK; Zhang, Y; Team, GUVI; , others; Published by: Published on: |
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Ring current and polar rain auroras
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The Study of the origin of broad plasma depletions in the equatorial F region
Oh, S; Lee, W; Kil, H; Kwak, Y; Paxton, L; Zhang, Y; Published by: Published on: |
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Drivers of the hemispheric asymmetry in the low-latitude electron density distribution
Kil, H; Kwak, Y; Lee, W; Paxton, L; Zhang, Y; Published by: Published on: |
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Zhang, Mingkan; Zhang, Ye; Lichtner, PC; Published by: Published on: |
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Zhang, Mingkan; Zhang, Ye; Lichtner, PC; Published by: Published on: |
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UV Remote Sensing Data Products-Turning Data Into Knowledge
Weiss, M; Paxton, L; Schaefer, RK; Comberiate, J; Hsieh, SW; Romeo, G; Wolven, BC; Zhang, Y; Published by: Published on: |
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Paxton, L; Schaefer, RK; Weiss, M; Wolven, BC; Zhang, Y; Miller, E; Bust, GS; Romeo, G; Published by: Published on: |
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The global positioning system (GPS) phase scintillation caused by highlatitude ionospheric irregularities during an intense high-speed stream (HSS) of the solar wind from April 29 to May 5, 2011, was observed using arrays of GPS ionospheric scintillation and total electron content monitors in the Arctic and Antarctica. The one-minute phase-scintillation index derived from the data sampled at 50 Hz was complemented by a proxy index (delta phase rate) obtained from 1-Hz GPS data. The scintillation occurrence coincided with ... Prikryl, Paul; Zhang, Yongliang; Ebihara, Yusuke; Ghoddousi-Fard, Reza; Jayachandran, Periyadan; Kinrade, Joe; Mitchell, Cathryn; Weatherwax, Allan; Bust, Gary; Cilliers, Pierre; , others; Published by: Annals of Geophysics Published on: |
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The global positioning system (GPS) phase scintillation caused by highlatitude ionospheric irregularities during an intense high-speed stream (HSS) of the solar wind from April 29 to May 5, 2011, was observed using arrays of GPS ionospheric scintillation and total electron content monitors in the Arctic and Antarctica. The one-minute phase-scintillation index derived from the data sampled at 50 Hz was complemented by a proxy index (delta phase rate) obtained from 1-Hz GPS data. The scintillation occurrence coincided with ... Prikryl, Paul; Zhang, Yongliang; Ebihara, Yusuke; Ghoddousi-Fard, Reza; Jayachandran, Periyadan; Kinrade, Joe; Mitchell, Cathryn; Weatherwax, Allan; Bust, Gary; Cilliers, Pierre; , others; Published by: Annals of Geophysics Published on: |
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Behaviors of the ionospheric and thermospheric disturbances during geomagnetic storms
Kil, H; Lee, W; Zhang, Y; Paxton, LJ; Published by: Published on: |
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A new capability has been developed at JHU/APL for forecasting the global aurora quantities based on the DMSP SSUSI data and the TIMED/GUVI Global Aurora Model. The SSUSI Aurora Forecast Model predicts the electron energy flux, mean energy, and equatorward boundary in the auroral oval for up to 1 day or 15 DMSP orbits in advance. In our presentation, we will demonstrate this newly implemented capability and its results. The future improvement plan will be discussed too. Hsieh, S.~W.; Zhang, Y.; Schaefer, R.~K.; Romeo, G.; Paxton, L.; Published by: AGU Fall Meeting Abstracts Published on: Auroral phenomena; forecasting; Ionosphere/magnetosphere interactions; Modeling and forecasting |
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Plasma Depletion Bay in the Summer Nighttime Equatorial Ionosphere
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The effect of the 135.6 nm emission originated from the ionosphere on the TIMED/GUVI O/N2 ratio
Kil, H; Lee, WK; Shim, J; Paxton, LJ; Zhang, Y; Published by: Journal of Geophysical Research: Space Physics Published on: |