Bibliography

Improving Discoverability of Geophysical Data using Location Based Services

Morrison, Daniel; Barnes, Robin; Potter, Matthew; Nylund, Stuart; Patrone, Dennis; Weiss, Michele; Talaat, Elsayed; Sarris, Theodore; Smith, Daniel;

Published by:       Published on:

YEAR: 2014     DOI:

The quiet nighttime low-latitude ionosphere as observed by TIMED/GUVI

In this paper, we examine the nighttime ionosphere climatology structure in the low latitude region and discrepancies between Global Ultraviolet Imager (GUVI) observations and the IRI model predictions using (1) the magnetic zonal mean of electron number density as a function of altitude and magnetic latitude, (2) vertical electron density profiles at various levels of F10.7 index, (3) nighttime descent and magnitude decrease of the ionosphere, (4) point-to-point comparisons of F-peak height (hmF2) and density (NmF2), and (5) the magnetic longitudinal variations of hmF2 and NmF2. The data collected from the Thermosphere, Ionosphere, Mesosphere, Energetics, and Dynamics (TIMED) mission since its launch in December 2001 have provided great opportunities for many scientific investigations of the ionosphere. In this analysis, we investigate the climatology of the nighttime low-latitude ionosphere under low geomagnetic activity (kp\ ⩽\ 4) using the electron density profiles inferred from the airglow measurements obtained by the GUVI aboard the TIMED spacecraft and compared with the results obtained from IRI (International Reference Ionosphere) model-2001. The observed climatology is an essential tool for further understanding the electrodynamics in the low-latitude region and improving the model\textquoterights prediction capability. The time range of the GUVI data used in this study is from 2002 (day 053) to 2006 (day 304), and the IRI model predictions were produced at every GUVI location. The ionosphere observed is generally of greater density than what IRI predicts throughout the night for all four seasons for low and moderate solar activity while the model over-predicts the electron density near the F-region peak at high solar activity before midnight. Observations show that the height of the F-region peak has a steep descent from dusk to midnight and near midnight the height of layer is insensitive to solar conditions, significantly different than what is predicted by IRI. Longitudinal features shown in GUVI data are present in the low-latitude ionosphere after sunset and continue through to midnight after which the low-latitude ionosphere is largely zonally symmetric.

Talaat, E.R.; Yee, J.-H.; Hsieh, S.-Y.; Paxton, L.J.; DeMajistre, R.; Christensen, A.B.; Bilitza, D.;

Published by: Advances in Space Research      Published on: 02/2013

YEAR: 2013     DOI: 10.1016/j.asr.2012.11.012

Electron density; GUVI; Ionosphere; IRI; TIMED

Global propagation of gravity waves generated with the whole atmosphere transfer function model

Mayr, Hans; Talaat, Elsayed; Wolven, Brian;

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

YEAR: 2013     DOI:

VITMO: A Case Study in Virtual Observatories as Data Portals and Development of Web Services as Search Tools

Smith, D; Barnes, RJ; Morrison, D; Talaat, ER; Potter, M; Patrone, D; Weiss, M; Sarris, T;

Published by:       Published on:

YEAR: 2013     DOI:

The source of the longitudinal asymmetry in the ionospheric tidal structure

Kil, H.; Kwak, Y.-S.; Oh, S.-J.; Talaat, E.; Paxton, L.; Zhang, Y.;

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

YEAR: 2011     DOI: 10.1029/2011JA016781

Electrified MSTIDs at Low Latitudes

Miller, ES; Kil, H; Makela, JJ; Paxton, LJ; Talaat, ER;

Published by:       Published on:

YEAR: 2011     DOI:

A Dataset Conjunction Locator Service for the Virtual ITM Observatory and Other VxOs

Morrison, D; Barnes, RJ; Potter, M; Talaat, ER; Weiss, M;

Published by:       Published on:

YEAR: 2011     DOI:

Direct observations of nonmigrating diurnal tides in the equatorial thermosphere

Talaat, ER; Lieberman, RS;

Published by: Geophysical research letters      Published on:

YEAR: 2010     DOI:

LWS FST: Determine and Quantify the Responses of Atmospheric/Ionospheric Composition and Temperature to Solar XUV Spectral Variability and Energetic Particles

Talaat, Elsayed; Fuller-Rowell, Tim; Qian, Liying; Richards, Phil; Ridley, Aaron; Burns, Alan; Bernstein, Dennis; Chamberlin, Phillip; Fedrizzi, Mariangel; Hsieh, Syau-Yun; , others;

Published by: 38th COSPAR Scientific Assembly      Published on:

YEAR: 2010     DOI:

Night-side mid-latitude 135.6 nm intensity enhancements: TIMED/GUVI observations

Zhang, Y; Paxton, LJ; Talaat, ER; Kil, H;

Published by:       Published on:

YEAR: 2010     DOI:

The causal link of the DE-3 tide, vertical drift, and plasma density

Kil, Hyosub; Talaat, Elsayed; Paxton, Larry; Fang, Tzu-Wei; Oh, Seung-Jun;

Published by:       Published on:

YEAR: 2009     DOI:

The effect of solar cycle on the coupling between the lower atmosphere and ionosphere

Talaat, ER;

Published by:       Published on:

YEAR: 2009     DOI:

SOLAR CYCLE EFFECTS ON THE COUPLING BETWEEN THE LOWER ATMOSPHERE AND IONOSPHERE

Talaat, ER;

Published by:       Published on:

YEAR: 2009     DOI:

Wave structures of the plasma density and vertical E$\times$ B drift in low-latitude F region

We investigate the seasonal, longitudinal, local time (LT), and altitudinal variations of the F region morphology at low latitudes using data from the first Republic of China satellite (ROCSAT-1), Global Ultraviolet Imager (GUVI), on board the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite, and the Defense Meteorological Satellite Program (DMSP) F13 and F15 satellites. Signatures of the longitudinally periodic plasma density structure emerge before 0900 LT. The wave structure is established before noon and further amplified in the afternoon. The amplitudes of the wave structure start to diminish in the evening. The wave-4 structure is clearly distinguishable during equinox and northern hemisphere summer. During northern hemisphere winter, the density structure can be characterized to either wave-4 or wave-3 structure owing to marginal separation of the two peaks in 180°–300°E. Observations of similar density structures from ROCSAT-1 (600 km) and DMSP (840 km) at 0930 and 1800 LT indicate the extension of the wave structure to altitudes greater than 840 km. The daytime wave structure persists into the night during the equinoxes but is significantly modified during the solstices. The modification is more significant at higher altitudes and is attributed to the effects of interhemispheric winds and the prereversal enhancement. The formation of the wavelike density structure in the morning and its temporal evolution in the afternoon show a close association with the vertical E × B drift. We conclude that the E × B drift during 0900–1200 LT determines the formation of the wavelike density structure.

Kil, H.; Talaat, E.; Oh, S.-J.; Paxton, L.; England, S.; Su, S.-Y.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2008

YEAR: 2008     DOI: 10.1029/2008JA013106

Equatorial ionosphere; wave structure; atmospheric tide

Lower Atmosphere Wave Effects on Ionospheric Variability

Talaat, Elsayed; Yee, Jeng-Hwa; Paxton, Larry; DeMajistre, Robert; Christensen, Andrew; Mlynczak, MG; , Russell; Zhu, Xun; Sotirelis, Thomas; Kil, Hyosub;

Published by: 37th COSPAR Scientific Assembly      Published on:

YEAR: 2008     DOI:

Wave structures of the plasma density and vertical E$\times$ B drift in low-latitude F region

Kil, H; Talaat, ER; Oh, S-J; Paxton, LJ; England, SL; Su, S-Y;

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

YEAR: 2008     DOI:

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:

Longitudinal structure of the vertical E$\times$ B drift and ion density seen from ROCSAT-1

Kil, Hyosub; Oh, S-J; Kelley, MC; Paxton, LJ; England, SL; Talaat, E; Min, K-W; Su, S-Y;

Published by: Geophysical Research Letters      Published on:

YEAR: 2007     DOI:

The effect of the vertical ExB drift on the longitudinal plasma density structure in low-mid latitudes

Kil, H; Oh, S; Paxton, LJ; Talaat, E;

Published by:       Published on:

YEAR: 2007     DOI:

The Variabilities of the Mesosphere and Lower Thermosphere as observed by TIMED

Yee, J; Talaat, E; Zhu, X; Russell, J; Mlynczak, M; SKINNER, W; Paxton, L;

Published by:       Published on:

YEAR: 2007     DOI:

Inter-annual and long-term variations observed in the ITM system

Talaat, ER; Yee, J; Ruohoniemi, JM; Zhu, X; DeMajistre, R; Russell, J; Mlynczak, M; Paxton, L; Christensen, A;

Published by:       Published on:

YEAR: 2007     DOI:

The low-latitude ionosphere as observed by TIMED/GUVI and TOPEX/Jason and comparisons with the IRI model

Hsieh, SW; Talaat, ER; Bilitza, D; DeMajistre, R; Paxton, L; Christensen, A; Yee, J;

Published by:       Published on:

YEAR: 2007     DOI:

VITMO: A Virtual Observatory for the ITM Community

Morrison, D; Weiss, M; Daley, R; Immer, L; Nylund, S; Yee, J; Talaat, E; Russell, J; Heelis, R; Kozyra, J; , others;

Published by:       Published on:

YEAR: 2006     DOI:

Analyses of solar activity effects on the low-latitude ionosphere

Wolven, BC; Talaat, ER; Yee, J; DeMajistre, R; Paxton, LJ; Christensen, A; Sotirelis, T; Smith, DC; Bilitza, D; Azeem, I;

Published by:       Published on:

YEAR: 2006     DOI:

The effects of solar activity on the low-latitude ionosphere as observed from space

Talaat, ER; Yee, J-H; DeMajistre, R; Paxton, LJ; Christensen, A; Sotirelis, T; Smith, DC; Bilitza, D;

Published by:       Published on:

YEAR: 2006     DOI:

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

Lower Atmosphere Effects on Thermospheric and Ionospheric Variability

Talaat, ER; Yee, J; Paxton, L; DeMajistre, R; Christensen, A; Russell, J; Mlynczak, M; Zhu, X; Sotirelis, T; Smith, D;

Published by:       Published on:

YEAR: 2006     DOI:

Developing cyber-infrastructure for addressing grand challenge questions in Sun-Earth system science: First results of a testbed worldwide online conference series

Kozyra, JU; Barnes, R; Fox, NJ; Fox, PA; Kuznetsova, MM; Morrison, D; Pallamraju, D; , Papitashvili; Ridley, A; Talaat, ER; , others;

Published by:       Published on:

YEAR: 2006     DOI:

The climatology of the quiet nighttime low-latitude ionosphere

Talaat, ER; Yee, J; DeMajistre, R; Paxton, L; Kil, H; Zhang, Y; Sotirelis, T; Christensen, A; Palo, S; Azeem, I; , others;

Published by:       Published on:

YEAR: 2005     DOI:

TIMED Contributions to the NASA Sun-Solar System Connections Great Observatory

Christensen, AB; Kozyra, J; Paxton, L; Talaat, E; Yee, J;

Published by:       Published on:

YEAR: 2005     DOI:

Observations of Tides and Planetary Waves from the stratosphere to the thermosphere

Talaat, ER; Yee, J; Paxton, L; Zhang, Y; Zhu, X; Meier, R; Christensen, A; Mlynczak, M; RUSSELL, JM;

Published by:       Published on:

YEAR: 2004     DOI:

GUVI/TIMED Observations of the auroral inputs and thermospheric response during the October and November 2003 Superstorms

Zhang, Y; Paxton, LJ; Kozyra, JU; DeMajistre, R; Kil, H; Morrison, D; Wolven, B; Brandt, PC; Mitchell, DG; Talaat, E;

Published by:       Published on:

YEAR: 2004     DOI:

Observational and Modeling Analysis of the Coupling Between Neutral Winds and the Low-Latitude Ionosphere

Talaat, ER; DeMajistre, R; Yee, J; Paxton, LJ; Crowley, G; Palo, S; Christensen, AB; Azeem, I; Roble, R; Kil, H; , others;

Published by:       Published on:

YEAR: 2004     DOI:

Far Ultraviolet Imaging of the low-Latitude Nightside Ionosphere with the GUVI Instrument on TIMED

Paxton, LJ; Kil, H; DeMajistre, R; Morrison, D; Straus, P; Talaat, E; Christensen, A; Wolven, B; Zhang, Y; Crowley, G; , others;

Published by:       Published on:

YEAR: 2004     DOI:

First Three Years of TIMED: New Results in Sun-Earth Connections

Kozyra, JU; Crowley, G; Goncharenko, LP; Hagan, ME; Lu, G; Mlynczak, MG; Paxton, LJ; RUSSELL, JM; Solomon, SC; Talaat, ER; , others;

Published by:       Published on:

YEAR: 2004     DOI:

Storm-time modifications of the mid-latitude nighttime ionosphere measured by the TIMED/GUVI instrument

Eichert, J; DeMajistre, R; Paxton, LJ; Kil, H; Talaat, E;

Published by:       Published on:

YEAR: 2004     DOI:

TIMED instruments

Yee, Jeng-Hwa; Talaat, Elsayed; Christensen, Andrew; Killeen, Timothy; Russell, James; Woods, Thomas;

Published by: Johns Hopkins APL Technical Digest      Published on:

YEAR: 2003     DOI:

TIMED science: First light

Talaat, Elsayed; Yee, Jeng-Hwa; Christensen, Andrew; Killeen, Timothy; Russell, James; Woods, Thomas;

Published by: Johns Hopkins APL technical digest      Published on:

YEAR: 2003     DOI:

Studies on the coupling between the neutral winds and the ionosphere at low latitudes

Talaat, ER; DeMajistre, R; Kil, H; Yee, JH; Paxton, L; Azeem, SM; Crowley, G; Christensen, A; Roble, RG;

Published by:       Published on:

YEAR: 2003     DOI:

Comparison of TIMED/GUVI inferred nighttime electron density with ionospheric observations and models

Talaat, ER; DeMajistre, R; Paxton, L; Yee, J; Goncharenko, LP; Crowley, G; Azeem, S; Shpynev, B; Zhou, Q; Kil, H; , others;

Published by:       Published on:

YEAR: 2002     DOI:

Remote sensing of the nighttime ionosphere with the TIMED Global Ultraviolet Imager

DeMajistre, R; Talaat, E; Kil, H;

Published by:       Published on:

YEAR: 2002     DOI:

Remote sensing of the nighttime ionosphere with the TIMED Global Ultraviolet Imager

The Global Ultraviolet Imager (GUVI) aboard the TIMED spacecraft monitors ultraviolet radiation from the terrestrial atmosphere in five spectral regions. Measurements of 1356-angstrom radiation on the Earth\textquoterights limb are part of this dataset. The primary source of this 1356-angstrom radiation on the night side is the recombination of molecular oxygen ions and electrons. In this work, we present a method for inferring vertical electron density profiles and total electron content (TEC) from the GUVI night-side limb data. We also describe the validation of these retrievals through the use of ground based measurements.

DeMajistre, R.; Talaat, E.; Kil, H.; Zhang, Y.; Paxton, L.; Morrison, D.; Wolven, B.; Meng, C.-I.; Christensen, A.;

Published by:       Published on:

YEAR: 2002     DOI:

Applications of Global Ultraviolet Imaging Data to the Prediction of Satellite Drag in Low-Earth Orbit

Wolven, BC; Paxton, LJ; Morrison, D; Zhu, X; Talaat, E; Zhang, Y; Kil, H; Meng, C; Yee, J;

Published by:       Published on:

YEAR: 2001     DOI: