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Found 68 entries in the Bibliography.
Showing entries from 1 through 50
2022 |
Following the 2022 Tonga Volcano eruption, dramatic suppression and deformation of the equatorial ionization anomaly (EIA) crests occurred in the American sector ∼14,000 km away from the epicenter. The EIA crests variations and associated ionosphere-thermosphere disturbances were investigated using Global Navigation Satellite System total electron content data, Global-scale Observations of the Limb and Disk ultraviolet images, Ionospheric Connection Explorer wind data, and ionosonde observations. The main results are as fo ... Aa, Ercha; Zhang, Shun-Rong; Wang, Wenbin; Erickson, Philip; Qian, Liying; Eastes, Richard; Harding, Brian; Immel, Thomas; Karan, Deepak; Daniell, Robert; Coster, Anthea; Goncharenko, Larisa; Vierinen, Juha; Cai, Xuguang; Spicher, Andres; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2022   DOI: 10.1029/2022JA030527 EIA suppression and X-pattern; Equatorial ionization anomaly; GNSS TEC; GOLD UV images; ICON MIGHTI neutral wind; Tonga volcano eruption |
2021 |
Recent studies revealed that the long-lasting daytime ionospheric enhancements of Total Electron Content (TEC) were sometimes observed in the Asian sector during the recovery phase of geomagnetic storms (e.g., Lei (J Geophys Res Space Phys 123: 3217–3232, 2018), Li (J Geophys Res Space Phys 125: e2020JA028238, 2020). However, they focused only on the dayside ionosphere, and no dedicated studies have been performed to investigate the nighttime ionospheric behavior during such kinds of storm recovery phases. In this study, w ... Wan, Xin; Xiong, Chao; Gao, Shunzu; Huang, Fuqing; Liu, Yiwen; Aa, Ercha; Yin, Fan; Cai, Hongtao; Published by: Satellite Navigation Published on: nov YEAR: 2021   DOI: 10.1186/s43020-021-00055-x Equatorial plasma irregularity; Geomagneitc storm; Ionospheric response; longitudinal variations; Storm recovery phase |
The capability of IRI-2016 in reproducing the hemispheric asymmetry, the winter and semiannual anomalies has been assessed over the equatorial ionization anomaly (EIA) during quiet periods of years 2013–2014. The EIA reconstructed using Total Electron Content (TEC) derived from Global Navigation Satellite System was compared with that computed using IRI-2016 along longitude 25° − 40oE. These were analyzed along with hemispheric changes in the neutral wind derived from the horizontal wind model and the TIMED GUVI columna ... Amaechi, Paul; Oyeyemi, Elijah; Akala, Andrew; Kaab, Mohamed; Younas, Waqar; Benkhaldoun, Zouhair; Khan, Majid; Mazaudier, Christine-Amory; Published by: Advances in Space Research Published on: aug YEAR: 2021   DOI: 10.1016/j.asr.2021.03.040 Equatorial ionization anomaly; hemispheric asymmetry; IRI-2016; Semiannual anomaly; Winter anomaly |
Hemispheric asymmetries of the Vertical Total Electron Content (VTEC) were observed during the first recovery phase of the geomagnetic storm on September 7–8, 2017. These asymmetries occurred at the mid latitudes at two different local times simultaneously: In the European-African sector (early morning), the storm time VTEC in the southern/northern hemisphere was higher/lower than the quiet time value, suggesting the southern/northern hemisphere entered the positive/negative phase (N−S+). In the East Asian-Australian sec ... Wang, Zihan; Zou, Shasha; Liu, Lei; Ren, Jiaen; Aa, Ercha; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2021   DOI: 10.1029/2020JA028829 |
2020 |
Multi-scale ionosphere responses to the May 2017 magnetic storm over the Asian sector We investigate multi-scale ionospheric responses to the May 27, 2017, geomagnetic storm over the Asian sector by using multi-instrumental observations, including ground-based global navigation satellite systems (GNSS) network, constellation observing system for meteorology, ionosphere and climate radio occultation, the FengYun-3C (FY-3C) GNSS occultation sounder electron density profiles and in situ plasma density observations provided by both Swarm and defense meteorological satellite program missions. This geomagnetic s ... Liu, Lei; Zou, Shasha; Yao, Yibin; Aa, Ercha; Published by: GPS Solutions Published on: 12/2019 YEAR: 2020   DOI: 10.1007/s10291-019-0940-1 Blob structure; Positive and negative ionosphere responses; TID; Geomagnetic storms |
Wang, Zihan; Zou, Shasha; Ren, Jiaen; Aa, Ercha; Liu, Lei; Published by: Published on: |
Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC)
Brückner, Marlen; Lonardi, Michael; Ehrlich, Andr\; Wendisch, Manfred; Jäkel, Evelyn; Schäfer, Michael; Quaas, Johannes; Kalesse, Heike; Published by: Published on: |
We simulated the impact of long‐term changes in the geomagnetic field on the spatial pattern of the Weddell Sea Anomaly (WSA). The Weddell Sea Anomaly, belonging to the region Slominska, Ewa; Strumik, Marek; Slominski, Jan; Haagmans, Roger; Floberghagen, Rune; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2020   DOI: 10.1029/2019JA027528 |
2017 |
North—south asymmetries in earth’s magnetic field The solar-wind magnetosphere interaction primarily occurs at altitudes where the dipole component of Earth’s magnetic field is dominating. The disturbances that are created in this interaction propagate along magnetic field lines and interact with the ionosphere–thermosphere system. At ionospheric altitudes, the Earth’s field deviates significantly from a dipole. North–South asymmetries in the magnetic field imply that the magnetosphere–ionosphere–thermosphere (M–I–T) coupling is different in the two hemisphe ... Laundal, Karl; Cnossen, Ingrid; Milan, Stephen; Haaland, SE; Coxon, John; Pedatella, NM; Förster, Matthias; Reistad, Jone; Published by: Space Science Reviews Published on: YEAR: 2017   DOI: 10.1007/s11214-016-0273-0 |
2016 |
SSUSI-lite: next generation far-ultraviolet sensor for characterizing geospace
Paxton, Larry; Hicks, John; Grey, Matthew; Parker, Charles; Hourani, Ramsay; Marcotte, Kathryn; Carlsson, Uno; Kerem, Samuel; Osterman, Steven; Maas, Bryan; , others; Published by: Published on: |
2015 |
Solar illumination control of ionospheric outflow above polar cap arcs We measure the flux density, composition, and energy of outflowing ions above the polar cap, accelerated by quasi-static electric fields parallel to the magnetic field and associated with polar cap arcs, using Cluster. Mapping the spacecraft position to its ionospheric foot point, we analyze the dependence of these parameters on the solar zenith angle (SZA). We find a clear transition at SZA between \~94\textdegree and \~107\textdegree, with the O+ flux higher above the sunlit ionosphere. This dependence on the ... Maes, L.; Maggiolo, R.; De Keyser, J.; Dandouras, I.; Fear, R.; Fontaine, D.; Haaland, S.; Published by: Geophysical Research Letters Published on: 03/2015 YEAR: 2015   DOI: 10.1002/2014GL062972 cold ion outflow; ion upflow; polar cap arc; polar ionosphere; polar wind; solar illumination |
2014 |
Solar filament impact on 21 January 2005: Geospace consequences On 21 January 2005, a moderate magnetic storm produced a number of anomalous features, some seen more typically during superstorms. The aim of this study is to establish the differences in the space environment from what we expect (and normally observe) for a storm of this intensity, which make it behave in some ways like a superstorm. The storm was driven by one of the fastest interplanetary coronal mass ejections in solar cycle 23, containing a piece of the dense erupting solar filament material. The momentum of the mas ... Kozyra, J.; Liemohn, M.; Cattell, C.; De Zeeuw, D.; Escoubet, C.; Evans, D.; Fang, X.; Fok, M.-C.; Frey, H.; Gonzalez, W.; Hairston, M.; Heelis, R.; Lu, G.; Manchester, W.; Mende, S.; Paxton, L.; Rastaetter, L.; Ridley, A.; Sandanger, M.; Soraas, F.; Sotirelis, T.; Thomsen, M.; Tsurutani, B.; Verkhoglyadova, O.; Published by: Journal of Geophysical Research: Space Physics Published on: 07/2014 YEAR: 2014   DOI: 10.1002/2013JA019748 cold dense plasma sheet; Equatorial anomaly; magnetotail; precipitation; prompt penetration electric field; solar filament |
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: |
2013 |
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 ... 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 |
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: |
Smith, D; Barnes, RJ; Morrison, D; Talaat, ER; Potter, M; Patrone, D; Weiss, M; Sarris, T; Published by: Published on: |
2012 |
During the sun s 11 year cycle, the thermosphere and ionosphere of the Earth react considerably to the changing levels of solar activity. It is commonly understood that as the solar Published by: Published on: |
2011 |
Propagation of plasma bubbles observed in Brazil from GPS and airglow data
Haase, J.S.; Dautermann, T.; Taylor, M.J.; Chapagain, N.; Calais, E.; Pautet, D.; Published by: Advances in Space Research Published on: Jan-05-2011 YEAR: 2011   DOI: 10.1016/j.asr.2010.09.025 |
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: |
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: |
2010 |
Interhemispheric observations of emerging polar cap asymmetries
Laundal, K.; Ostgaard, N.; Snekvik, K.; Frey, H.; Published by: Journal of Geophysical Research Published on: Jan-01-2010 YEAR: 2010   DOI: 10.1029/2009JA015160 |
Direct observations of nonmigrating diurnal tides in the equatorial thermosphere
Published by: Geophysical research letters Published on: |
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: |
Night-side mid-latitude 135.6 nm intensity enhancements: TIMED/GUVI observations
Zhang, Y; Paxton, LJ; Talaat, ER; Kil, H; Published by: Published on: |
2009 |
Overview and summary of the Spread F Experiment (SpreadFEx) We provide here an overview of, and a summary of results arising from, an extensive experimental campaign (the Spread F Experiment, or SpreadFEx) performed from September to November 2005, with primary measurements in Brazil. The motivation was to define the potential role of neutral atmosphere dynamics, specifically gravity wave motions propagating upward from the lower atmosphere, in seeding Rayleigh-Taylor instability (RTI) and plasma bubbles extending to higher altitudes. Campaign measurements focused on the Brazilian ... Fritts, D.; Abdu, M.; Batista, B.; Batista, I.; Batista, P.; Buriti, R.; Clemesha, B.; Dautermann, T.; de Paula, E.; Fechine, B.; Fejer, B.; Gobbi, D.; Haase, J.; Kamalabadi, F.; Kherani, E.; Laughman, B.; Lima, P.; Liu, H.-L.; Medeiros, A.; Pautet, P.-D.; Riggin, D.; Rodrigues, F.; Sabbas, F.; Sobral, J.; Stamus, P.; Takahashi, H.; Taylor, M.; Vadas, S.; Vargas, F.; Wrasse, C.; Published by: Annales Geophysicae Published on: Jan-01-2009 YEAR: 2009   DOI: 10.5194/angeo-27-2141-2009 |
The Spread F Experiment (SpreadFEx): Program overview and first results
Fritts, D.; Abdu, M.; Batista, B.; Batista, I.; Batista, P.; Buriti, R.; Clemesha, B.; Dautermann, T.; de Paula, E.; Fechine, B.; Fejer, B.; Gobbi, D.; Haase, J.; Kamalabadi, F.; Kherani, E.; Laughman, B.; Lima, J.; Liu, H.-L.; Medeiros, A.; Pautet, P.-D.; Riggin, D.; Rodrigues, F.; Sabbas, Sao; Sobral, J.; Stamus, P.; Takahasi, H.; Taylor, M.; Vadas, S.; Vargas, F.; Wrasse, C.; Published by: Earth Planets Space Published on: |
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: |
The effect of solar cycle on the coupling between the lower atmosphere and ionosphere
Published by: Published on: |
SOLAR CYCLE EFFECTS ON THE COUPLING BETWEEN THE LOWER ATMOSPHERE AND IONOSPHERE
Published by: Published on: |
2008 |
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 befo ... 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 |
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: |
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: |
2007 |
First terrestrial soft X-ray auroral observation by the Chandra X-ray Observatory
Bhardwaj, Anil; Gladstone, Randall; Elsner, Ronald; Ostgaard, Nikolai; Waite, Hunter; Cravens, Thomas; Chang, Shen-Wu; Majeed, Tariq; Metzger, Albert; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-02-2007 YEAR: 2007   DOI: 10.1016/j.jastp.2006.07.011 |
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: |
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: |
Kil, H; Oh, S; Paxton, LJ; Talaat, E; Published by: Published on: |
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: |
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: |
Kozyra, JU; Cattell, CA; Clilverd, M; Evans, DS; Kavanagh, A; Liemohn, MW; Mende, SB; Paxton, LJ; Ridley, A; Soraas, F; Published by: Published on: |
Hsieh, SW; Talaat, ER; Bilitza, D; DeMajistre, R; Paxton, L; Christensen, A; Yee, J; Published by: Published on: |
2006 |
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: |
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: |
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: |
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: |
Kozyra, JU; Barnes, R; Fox, NJ; Fox, PA; Kuznetsova, MM; Morrison, D; Pallamraju, D; , Papitashvili; Ridley, A; Talaat, ER; , others; Published by: Published on: |
2005 |
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: |
Simultaneous observations of the auroral ovals in both hemispheres under varying conditions
Stubbs, TJ; Vondrak, RR; Ostgaard, N; Sigwarth, JB; Frank, LA; Published by: Geophysical research letters Published on: |
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: |
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