GUVI

Global UltraViolet Imager

GUVI Biblio





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Found 62 entries in the Bibliography.


Showing entries from 1 through 50


2022

The geoeffectiveness of TIE-GCM simulations of ionospheric critical frequency foF2 at the equatorial station of Thiruvananthapuram in the Indian sector

An extensive intercomparison of ionospheric foF2 observations and NCAR Thermosphere-Ionosphere ElectrodynamicsGeneral Circulation Model(TIE-GCM)simulations has been carried out for the dip equatorial location of Thiruvananthapuram. Ionosonde measurements for geomagnetically quiet days of 2002, 2006 and 2008, representing solar maximum, solar minimum and deep solar minimum conditions have been used for the analysis. In general TIE-GCM simulations reproduced the temporal and seasonal characteristics of foF2 over Thiruvananthap ...

Mridula, N.; Manju, G.; Sijikumar, S.; Pant, Tarun;

Published by: Advances in Space Research      Published on: may

YEAR: 2022     DOI: 10.1016/j.asr.2022.02.018

Comparison; foF2; TIE-GCM

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

Study of ionospheric total electron content and its numerical estimation during several geomagnetic storms in the 24 solar cycle

We present the ionospheric response of geomagnetic storms as observed from ionospheric Total Electron Content (TEC). We select nine storm events and study the GPS-TEC profiles

Kundu, Subrata; Sasmal, Sudipta;

Published by:       Published on:

YEAR: 2022     DOI: 10.21203/rs.3.rs-1652015/v1

Geomagnetic and Solar Dependencies of Midlatitude E-Region Irregularity Occurrence Rate: A Climatology Based on Wuhan VHF Radar Observations

By using Wuhan VHF radar, we show the morphological features of E-region field-aligned irregularity (FAI) occurrence at Wuhan during 2015–2020. Statistical results present that E-region FAI occurrence reaches a maximum after sunset in summer season. According to Doppler spectrum features, type-2 irregularity is predominantly observed at Wuhan. In addition, we observed a remarkable correlation between E-region FAI occurrence and geomagnetic activity, which includes periods of positive correlation and negative correlation de ...

Liu, Yi; Zhou, Chen; Xu, Tong; Deng, Zhongxin; Du, Zhitao; Lan, Ting; Tang, Qiong; Zhu, Yunzhou; Wang, Zhuangkai; Zhao, Zhengyu;

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

YEAR: 2022     DOI: 10.1029/2021JA029597

Ionospheric Response to the 23-31 August 2018 Geomagnetic Storm in the Europe-African Longitude Sector Using Multi-Instrument Observations

This study presents ionospheric responses of the mid and low-latitude region in the Europe-African longitude sector (along 30 +/- 10 deg E) to the intense geomagnetic storm of 23–31 August 2018 (SYM-Hmin = −207 nT) using the Global Ionospheric Map (GIM) and Global Positioning System (GPS) receivers data, the satellite data (SWARM, Defense Meteorological Satellite Program (DMSP), Global Ultraviolet Imager on board the Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (GUVI/TIMED)), and Prompt Penetration Equato ...

Dugassa, Teshome; Mezgebe, Nigussie; Habarulema, John; Habyarimana, Valence; Oljira, Asebe;

Published by: Advances in Space Research      Published on:

YEAR: 2022     DOI: 10.1016/j.asr.2022.10.063

Critical Dynamics in Stratospheric Potential Energy Variations Prior to Significant (M> 6.7) Earthquakes

Lithosphere–atmosphere–ionosphere coupling (LAIC) is studied through various physical or chemical quantities, obtained from different sources, which are observables of the involved

Politis, Dimitrios; Potirakis, Stelios; Kundu, Subrata; Chowdhury, Swati; Sasmal, Sudipta; Hayakawa, Masashi;

Published by: Symmetry      Published on:

YEAR: 2022     DOI: 10.3390/sym14091939

Seismogenic Anomalies in Atmospheric Gravity Waves as Observed from SABER/TIMED Satellite during Large Earthquakes

Atmospheric disturbances caused by seismic activity are a complex phenomenon. The Lithosphere–Atmosphere–Ionosphere Coupling (LAIC) (LAIC) mechanism gives a detailed idea

Kundu, Subrata; Chowdhury, Swati; Ghosh, Soujan; Sasmal, Sudipta; Politis, Dimitrios; Potirakis, Stelios; Yang, Shih-Sian; Chakrabarti, Sandip; Hayakawa, Masashi;

Published by: Journal of Sensors      Published on:

YEAR: 2022     DOI: 10.1155/2022/3201104

2021

Seasonal Variation of Post-sunset and Post-midnight Equatorial Plasma Bubble in Malaysia during Moderate Solar Activity Level

The equatorial plasma bubble (EPB) is a common event that occurred at the F-layer of the ionosphere due to plasma irregularities. Its occurrence can be observed around sunset and midnight hours, depending on the season. In this study, ROTI plot measurement was utilized in EPB detection, where the data was obtained from the Department of Survey and Mapping Malaysia (JUPEM). The seasonal variation of EPB in Langkawi, Malaysia was investigated for both post-sunset and post-midnight occurrence within the period of moderate solar ...

Rosli, Nur; Hamid, Nurul; Abdullah, Mardina; Buhari, Suhaila; Sarudin, Idahwati;

Published by:       Published on: nov

YEAR: 2021     DOI: 10.1109/IconSpace53224.2021.9768743

solar activity; equatorial plasma bubble (EPB); GPS; Ionosphere; Plasma measurements; Plasmas; post-midnight; Southeast Asia; Time-frequency analysis

Latitudinal Dependence of Ionospheric Responses to Some Geomagnetic Storms during Low Solar Activity

The Latitudinal dependence in the response of the Ionospheric F2-layer electron density (NmF2) and peak height (hmF2) to three geomagnetic storms of May and August 2010 has been examined. The data-sets used for the study were obtained from Ilorin, Nigeria (1.87° S/76.67° E), San Vito, Italy (34.68° N/90.38° E), Hermanus, South Africa (42.34° S/82.15° E), and Pruhonice, Czech Republic (45.66° N/90.38° E) geomagnetic coordinates. The quiet time result shows that the rise in NmF2 began earlier at San Vito, followed by P ...

Joshua, B.; Adeniyi, J.; Olawepo, A.; Rabiu, Babatunde; Daniel, Okoh; Adebiyi, S.; Adebesin, B.; Ikubanni, S.; Abdurahim, B.;

Published by: Geomagnetism and Aeronomy      Published on: may

YEAR: 2021     DOI: 10.1134/S0016793221030063

Electric field; Electron density; Geomagnetic storms; magnetosphere; peak height

Field-Aligned Current During an Interval of BY-Dominated Interplanetary-Field; Modeled-to-Observed Comparisons

Carter, Jennifer; Samsonov, AA; Milan, Stephen; Branduardi-Raymont, Graziella; Ridley, Aaron; Paxton, Larry; Anderson, Brian; Waters, Colin; Edwards, Thomas;

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

YEAR: 2021     DOI:

Field-aligned current during an interval of $$\backslash$rm B\_ $\$Y$\$ $-dominated interplanetary-field; modeled-to-observed comparisons

Carter, Jennifer; Samsonov, Andrey; Milan, Stephen; Branduardi-Raymont, Graziella; Ridley, Aaron; Paxton, Larry; Anderson, Brian; Waters, Colin; Edwards, Thomas;

Published by: Earth and Space Science Open Archive ESSOAr      Published on:

YEAR: 2021     DOI:

Long Term Ionospheric VTEC Variation during Solar cycle 24 as Observed from Indian IGS GPS Station

Thermo-ionosheric O/N2 ratio obtained by GUVI for March and September equinox days, and June and December solstice days of 2014 represented as the equinox month and solstice

Kundu, S; Sasmal, S; Chakrabarti, SK;

Published by: Int. J. Sci. Res. in Physics and Applied Sciences Vol      Published on:

YEAR: 2021     DOI:

Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 4. Polar Cap motions and origins of the Universal Time effect

We use the \textlessi\textgreateram\textlessi/\textgreater, \textlessi\textgreateran, as\textlessi/\textgreater and the \textlessi\textgreateraσ\textlessi/\textgreater geomagnetic indices to the explore a previously overlooked factor in magnetospheric electrodynamics, namely the inductive effect of diurnal motions of the Earth’s magnetic poles toward and away from the Sun caused by Earth’s rotation. Because the offset of the (eccentric dipole) geomagnetic pole from the rotational axis is roughly twice as large in the so ...

Lockwood, Mike; Haines, Carl; Barnard, Luke; Owens, Mathew; Scott, Chris; Chambodut, Aude; McWilliams, Kathryn;

Published by: Journal of Space Weather and Space Climate      Published on:

YEAR: 2021     DOI: 10.1051/swsc/2020077

2020

Influence of geomagnetic storms on the mid latitude D and F2 regions

Naidu, Pyla; Madhavilatha, Tirumalaraju; Devi, Malladi;

Published by: Annals of Geophysics      Published on:

YEAR: 2020     DOI:

Study the Ionospheric Total Electron Content (TEC) variation during Geomagnetic Storm in 24th Solar Cycle

Kundu, Subrata; Sasmal, Sudipta; Chakraborti, Suman; Chakrabarti, Sandip;

Published by:       Published on:

YEAR: 2020     DOI:

Response of Equatorial Ionization in Indian Longitudes to HSSW Driven Geomagnetic Storm

Sur, Dibyendu; Firdaus, Jasmine; Paul, Trisha; Dutta, Raktima; Bhattacharyya, Chaitali;

Published by:       Published on:

YEAR: 2020     DOI:

Correlation of Disturbed Dynamo Electric Field and Thermospheric Plasma Transport with Latitudinally Diverse Total Electron Content During Recovery Phase of a Geomagnetic Storm

The present paper establishes positive correlation between the latitudinal extents of Disturbed Dynamo electric Field (DDEF) with the intensity of geomagnetic storm during October

Sur, Dibyendu; Firdaus, Jasmine; Dutta, Raktima; Chakraborty, Athena;

Published by: Proceedings of Industry Interactive Innovations in Science, Engineering \& Technology (I3SET2K19)      Published on:

YEAR: 2020     DOI:

Equatorial and low-latitude ionospheric TEC response to CIR-driven geomagnetic storms at different longitude sectors

In this study the response of ionospheric F-region to 18–21 September 2014, 19–24 January 2016, and 07–10 March 2016 CIR-driven storms in the equatorial and low-latitude region of

Dugassa, Teshome; Habarulema, John; Nigussie, Melessew;

Published by: Advances in Space Research      Published on:

YEAR: 2020     DOI: 10.1016/j.asr.2020.07.003

Hybrid-Vlasov simulation of auroral proton precipitation in the cusps: Comparison of northward and southward interplanetary magnetic field driving

Particle precipitation is a central aspect of space weather, as it strongly couples the magnetosphere and the ionosphere and can be responsible for radio signal disruption at high

Grandin, Maxime; Turc, Lucile; Battarbee, Markus; Ganse, Urs; Johlander, Andreas; Pfau-Kempf, Yann; Dubart, Maxime; Palmroth, Minna;

Published by: Journal of space weather and space climate      Published on:

YEAR: 2020     DOI: 10.1051/swsc/2020053

2019

Influence of Geomagnetic Storms on Ionospheric F-2-Layer at Low and Mid Latitudes in 300 degrees E Meridian

Naidu, Peddi; Latha, Madhavi; Devi, Indira;

Published by: GEOMAGNETISM AND AERONOMY      Published on:

YEAR: 2019     DOI:

Influence of Geomagnetic Storms on Ionospheric F2-Layer at Low and Mid Latitudes in 300 E Meridian

Naidu, Peddi; Latha, Madhavi; Devi, Indira;

Published by: Geomagnetism and Aeronomy      Published on:

YEAR: 2019     DOI:

Hybrid-Vlasov modelling of nightside auroral proton precipitation during southward interplanetary magnetic field conditions

Particle precipitation plays a key role in the coupling of the terrestrial magnetosphere and ionosphere by modifying the upper atmospheric conductivity and chemistry, driving field-aligned currents, and producing aurora. Yet quantitative observations of precipitating fluxes are limited, since ground-based instruments can only provide indirect measurements of precipitation, while particle telescopes aboard spacecraft merely enable point-like in situ observations with an inherently coarse time resolution above a given location ...

Grandin, Maxime; Battarbee, Markus; Osmane, Adnane; Ganse, Urs; Pfau-Kempf, Yann; Turc, Lucile; Brito, Thiago; Koskela, Tuomas; Dubart, Maxime; Palmroth, Minna;

Published by:       Published on:

YEAR: 2019     DOI: 10.5194/angeo-37-791-2019

2018

Neutralized solar wind ahead of the Earth s magnetopause as contribution to non-thermal exospheric hydrogen

Their exciting result is inferred from radiative transfer modeling of Lyman-alpha resonance glow measurements made with the satellite TIMED/GUVI. To best fit these results with their

Fahr, Hans; Nass, Uwe; Dutta-Roy, Robindro; Zoennchen, Jochen;

Published by:       Published on:

YEAR: 2018     DOI: 10.5194/angeo-36-445-2018

Polar cap patch signatures during geomagnetic disturbed conditions

H\oeg, Per; Durgonics, Tibor;

Published by:       Published on:

YEAR: 2018     DOI:

2017

Multiinstrument observations of a geomagnetic storm and its effects on the Arctic ionosphere: A case study of the 19 February 2014 storm

We present a multiinstrumented approach for the analysis of the Arctic ionosphere during the 19 February 2014 highly complex, multiphase geomagnetic storm, which had the largest impact on the disturbance storm-time index that year. The geomagnetic storm was the result of two powerful Earth-directed coronal mass ejections (CMEs). It produced a strong long lasting negative storm phase over Greenland with a dominant energy input in the polar cap. We employed global navigation satellite system (GNSS) networks, geomagnetic obs ...

Durgonics, Tibor; Komjathy, Attila; Verkhoglyadova, Olga; Shume, Esayas; Benzon, Hans-Henrik; Mannucci, Anthony; Butala, Mark; H\oeg, Per; Langley, Richard;

Published by: Radio Science      Published on: 01/2017

YEAR: 2017     DOI: 10.1002/2016RS006106

The scintillation prediction observations research task (SPORT): an international science mission using a cubesat

UV Airglow images from TIMED GUVI clearly showing the equatorial anomaly with embedded depletions that have penetrated through the F peak. Green, Red and Blue traces show the

Spann, James; Swenson, Charles; Durao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Abdu, Mangalathayil; Krause, Linda; Fry, Craig; , others;

Published by:       Published on:

YEAR: 2017     DOI:

The scintillation prediction observations research task (SPORT): an international science mission using a cubesat

UV Airglow images from TIMED GUVI clearly showing the equatorial anomaly with embedded depletions that have penetrated through the F peak. Green, Red and Blue traces show the

Spann, James; Swenson, Charles; Durao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Abdu, Mangalathayil; Krause, Linda; Fry, Craig; , others;

Published by:       Published on:

YEAR: 2017     DOI:

Multi-Instrument Observations of Physical Processes in the Arctic Ionosphere and Derived Applications

The main focus of this dissertation is the study of the physical processes in the northern high-latitude (or simply Arctic) ionosphere. In addition to the main focus, two further studies are also presented regarding midlatitude ionosphere and neutral atmospheric simulations and observations. This section presents some basic background and the motivation behind these research topics.

Durgonics, Tibor; H\oeg, P; Olsen, N; Coster, AJ; Wintoft, P; Komjathy, A; von Benzon, H;

Published by:       Published on:

YEAR: 2017     DOI:

The scintillation prediction observations research task (sport) mission

Fry, G; Spann, James; Swenson, Charles; Durao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Abdu, Mangalathayli; Krause, Linda; , others;

Published by:       Published on:

YEAR: 2017     DOI:

The scintillation prediction observations research task (sport) mission

Fry, G; Spann, James; Swenson, Charles; Durao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Abdu, Mangalathayli; Krause, Linda; , others;

Published by:       Published on:

YEAR: 2017     DOI:

The Scintillation Prediction Observations Research Task: A Multinational Science Mission Using a Cubesat

Spann, James; Swenson, Charles; Dur\~ao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Abdu, Mangalathayil; Krause, Linda; Denardin, Clezio; , others;

Published by:       Published on:

YEAR: 2017     DOI:

The Scintillation Prediction Observations Research Task: A Multinational Science Mission Using a Cubesat

Spann, James; Swenson, Charles; Dur\~ao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Abdu, Mangalathayil; Krause, Linda; Denardin, Clezio; , others;

Published by:       Published on:

YEAR: 2017     DOI:

2016

Electrodynamics of ionospheric weather over low latitudes

The dynamic state of the ionosphere at low latitudes is largely controlled by electric fields originating from dynamo actions by atmospheric waves propagating from below and the solar wind-magnetosphere interaction from above. These electric fields cause structuring of the ionosphere in wide ranging spatial and temporal scales that impact on space-based communication and navigation systems constituting an important segment of our technology-based day-to-day lives. The largest of the ionosphere structures, the equatorial i ...

Abdu, Mangalathayil;

Published by: Geoscience Letters      Published on: 12/2016

YEAR: 2016     DOI: 10.1186/s40562-016-0043-6

Ionospheric disturbances during magnetic storms at SANAE

The coronal mass ejections (CMEs) and solar flares associated with extreme solar activity may strike the Earth s magnetosphere and give rise to geomagnetic storms. During

Hiyadutuje, Alicreance; Nsengiyumva, Francois; Uwamahoro, Jean;

Published by:       Published on:

YEAR: 2016     DOI:

Analysis of High-Latitude Ionospheric Processes During the Nov 2015 HSS and CME-Induced Geomagnetic Storm: A Multi-Instrument Observational Approach

Durgonics, Tibor; Komjathy, Attila; Verkhoglyadova, Olga; Hoeg, Per; Paul, Ashik;

Published by:       Published on:

YEAR: 2016     DOI:

Multi-Instrument Observations of Geomagnetic Storms in the Arctic Ionosphere

Durgonics, Tibor; Komjathy, Attila; Verkhoglyadova, Olga; Shume, Esayas; Benzon, Hans-Henrik; Mannucci, Anthony; Butala, Mark; H\oeg, Per; Langley, Richard;

Published by:       Published on:

YEAR: 2016     DOI:

SPORT: The Scintillation Prediction Observations Research Task

Spann, James; Swenson, Charles; Durao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Krause, Linda; Nardin, Clezio; Fonseca, Eloi; , others;

Published by:       Published on:

YEAR: 2016     DOI:

2015

Climatology of equatorial plasma bubble observed by MyRTKnet over the years 2008--2013

Malaysia Real-Time Kinematics GNSS Network (MyRTKnet) which consists of 78 GPS receivers was used to investigate the occurrence of equatorial plasma bubble (EPB) along 96\textdegreeE-120\textdegreeE longitude. In this study, we present the monthly occurrence rate of EPB along the geographical longitudes of 96\textdegreeE-120\textdegreeE for a half of solar cycle period (2008-2013). A 2D map of rate of TEC change index (ROTI) projected at 300 km altitude was derived from the signal paths between GPS satellites and the rece ...

Buhari, S.; Abdullah, M.; Yokoyama, T.; Hasbi, A.; Otsuka, Y.; Nishioka, M.; Bahari, S.A.; Tsugawa, T.;

Published by:       Published on: 08/2015

YEAR: 2015     DOI: 10.1109/IconSpace.2015.7283752

Observations of thermosphere and ionosphere changes due to the dissipative 6.5-day wave in the lower thermosphere

In the current work, temperature and wind data from the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite during the years 2002\textendash2007 were used to describe the seasonal variations of the westward propagating 6.5-day planetary wave in the mesosphere and lower thermosphere (MLT). Thermospheric composition data from the TIMED satellite and ionospheric total electron content (TEC) from the International Global Navigation Satellite System (GNSS) Service were then employed to carry out two ca ...

Gan, Q.; Yue, J.; Chang, L.; Wang, W.; Zhang, S.; Du, J.;

Published by: Annales Geophysicae      Published on: 01/2015

YEAR: 2015     DOI: 10.5194/angeo-33-913-2015

The Scintillation Prediction Observations Research Task SA43C-04

Spann, James; Swenson, Charles; Dur\~ao, Otavio; Loures, Luis; Heelis, Rod; Bishop, Rebecca; Le, Guan; Krause, Linda; Nardin, Clezio; Fonseca, Eloi; , others;

Published by:       Published on:

YEAR: 2015     DOI:

2014

Continuous generation and two-dimensional structure of equatorial plasma bubbles observed by high-density GPS receivers in Southeast Asia

High-density GPS receivers located in Southeast Asia (SEA) were utilized to study the two-dimensional structure of ionospheric plasma irregularities in the equatorial region. The longitudinal and latitudinal variations of tens of kilometer-scale irregularities associated with equatorial plasma bubbles (EPBs) were investigated using two-dimensional maps of the rate of total electron content change index (ROTI) from 127 GPS receivers with an average spacing of about 50\textendash100 km. The longitudinal variations of the tw ...

Buhari, S.; Abdullah, M.; Hasbi, A.; Otsuka, Y.; Yokoyama, T.; Nishioka, M.; Tsugawa, T.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 12/2014

YEAR: 2014     DOI: 10.1002/jgra.v119.1210.1002/2014JA020433

equatorial plasma bubble; GPS-ROTI map; GPS-TEC

2013

Equatorial ionization anomaly development as studied by GPS TEC and foF2 over Brazil: A comparison of observations with model results from SUPIM and IRI-2012

The equatorial ionization anomaly (EIA) development is studied using the total electron content (TEC) observed by the Global Positioning System (GPS) satellites, the F2-layer critical frequency (foF2) as measured by digisondes operated in the Brazilian sector, and by model simulation using the SUPIM (Sheffield University Plasmasphere Ionosphere Model). We have used two indices based on foF2 and TEC to represent the strength of the EIA Southern Anomaly Crest (SAC), which are denoted, respectively, by SAC( ...

Nogueira, P.A.B.; Abdu, M.A.; Souza, J.R.; Batista, I.S.; Bailey, G.J.; Santos, A.M.; Takahashi, H.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 11/2013

YEAR: 2013     DOI: 10.1016/j.jastp.2013.08.013

Equatorial anomaly; foF2; Ionospheric modeling; TEC

2012

The Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite: A 20 year perspective

The Wind Imaging Interferometer (WINDII) was launched on the NASA\textquoterights Upper Atmosphere Research Satellite on 12 September 1991 and operated until 2003. Its role in the mission was to measure vector winds in the Earth\textquoterights atmosphere from 80 to 110 km, but its measurements extended to nearly 300 km. The approach employed was to measure Doppler shifts from a suite of visible region airglow lines emitted over this altitude range. These included atomic oxygen O(1S) and O(1D) lines, ...

Shepherd, G.; Thuillier, G.; Cho, Y.-M.; Duboin, M.-L.; Evans, W.; Gault, W.; Hersom, C.; Kendall, D.; Lathuillère, C.; Lowe, R.; McDade, I.; Rochon, Y.; Shepherd, M.; Solheim, B.; Wang, D.-Y.; Ward, W.;

Published by: Reviews of Geophysics      Published on: 06/2012

YEAR: 2012     DOI: 10.1029/2012RG000390

airglow; dynamics; interferometers; mesosphere; temperature; winds

Equatorial ionosphere responses to two magnetic storms of moderate intensity from conjugate point observations in Brazil

Equatorial ionospheric responses during two magnetic storms of moderate intensity are investigated, for the first time, by conjugate point observations in Brazil. The study focuses on storm-induced changes in the evening prereversal vertical drift, thermospheric trans-equatorial winds, spread F/plasma bubble irregularity development, electron density/plasma frequency heights, the EIA strength, and zonal plasma drifts. It is based on data obtained from five Digisondes operated in Brazil, three of them being part of a conju ...

Abdu, M.; Batista, I.; Bertoni, F.; Reinisch, B.; Kherani, E.; Sobral, J.;

Published by: Journal of Geophysical Research      Published on: 05/2012

YEAR: 2012     DOI: 10.1029/2011JA017174

Equatorial ionosphere; Magnetic storms; plasma bubbles; plasma drifts; spread F; transequatorial winds

2010

Scintillation-producing Fresnel-scale irregularities associated with the regions of steepest TEC gradients adjacent to the equatorial ionization anomaly

Muella, M.; Kherani, E.; de Paula, E.; Cerruti, A.; Kintner, P.; Kantor, I.; Mitchell, C.; Batista, I.; Abdu, M.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2010

YEAR: 2010     DOI: 10.1029/2009JA014788

Periodic spacing between consecutive equatorial plasma bubbles

Makela, Jonathan; Vadas, SL; Muryanto, R; Duly, T; Crowley, G;

Published by: Geophysical Research Letters      Published on:

YEAR: 2010     DOI:

Estimating The Forces That Drive Ionosphere And Thermosphere Variability: Continuous Data And Assimilative Modeling

onosphere-thermosphere science has long been hampered by a lack of measurements of the underlying forces that determine plasma structure. These forces include electric fields, thermospheric composition, winds and solar EUV irradiance. All of these forces are dynamic quantities and of great importance to the underlying science. The rapid proliferation of electron density and total electron content measurements from ground and space-borne GPS receivers and other instruments suggests a great potential in the following indirect ...

Mannucci, Anthony; Pi, Xiaoqing; Butala, Mark; Stephens, Phil; Wilson, Brian; Komjathy, Attila; Iijima, Byron; Akopian, Vardan; Dumett, Miguel;

Published by: To advocate developing a model-based approach to retrieving the driving forces from measurements of electron density structure and dynamics      Published on:

YEAR: 2010     DOI:

2009

Gravity wave initiation of equatorial spread F/plasma bubble irregularities based on observational data from the SpreadFEx campaign

The data from ground based experiments conducted during the 2005 SpreadFEx campaign in Brazil are used, with the help of theoretical model calculations, to investigate the precursor conditions, and especially, the role of gravity waves, in the instability initiation leading to equatorial spread F development. Data from a digisonde and a 30 MHz coherent back-scatter radar operated at an equatorial site, Sao Luis (dip angle: 2.7\textdegree) and from a digisonde operated at another equatorial site (dip angle: -11.5\textdegre ...

Abdu, M.; Kherani, Alam; Batista, I.; de Paula, E.; Fritts, D.; Sobral, J.;

Published by: Annales Geophysicae      Published on: Jan-01-2009

YEAR: 2009     DOI: 10.5194/angeo-27-2607-2009

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

Simultaneous observation of ionospheric plasma bubbles and mesospheric gravity waves during the SpreadFEx Campaign

Takahashi, H.; Taylor, M.; Pautet, P.-D.; Medeiros, A.; Gobbi, D.; Wrasse, C.; Fechine, J.; Abdu, M.; Batista, I.; Paula, E.; Sobral, J.; Arruda, D.; Vadas, S.; Sabbas, F.; Fritts, D.;

Published by: Annales Geophysicae      Published on: Jan-01-2009

YEAR: 2009     DOI: 10.5194/angeo-27-1477-2009



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