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Found 43 entries in the Bibliography.
Showing entries from 1 through 43
| 2019 |
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Isolated Auroral Spots Observed by DMSP/SSUSI This work reports auroral spots event observed by the SSUSI instruments on board the DMSP spacecraft between 22 and 23 July 2009 during the recovery phase of a moderate magnetic storm. The spots were observed between 18:00 and 02:00 magnetic local time and stayed at ~60\textdegree magnetic latitude. They lasted for ~10 hr and corotated with ~64\% of the Earth\textquoterights rotational speed. In situ observations indicate that the isolated auroral spots were produced by energetic ions at energies between 10 and 240 keV, w ... Zhou, Su; Luan, Xiaoli; Pierrard, Viviane; Han, Desheng; Published by: Journal of Geophysical Research: Space Physics Published on: 10/2019 YEAR: 2019 DOI: 10.1029/2019JA026853 |
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Tonolo, Federica; Salmain, Michèle; Scalcon, Valeria; Top, Siden; Pigeon, Pascal; Folda, Alessandra; Caron, Benoit; Mcglinchey, Michael; Toillon, Robert-Alain; Bindoli, Alberto; , others; Published by: ChemMedChem Published on: |
| 2018 |
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Low latitude ionospheric behavior during solar transient disturbances of solar flares and storm time penetrating electric fields comprises an important part of the Earth\textquoterights space weather. The flares enhance the electron density of the sunlit ionosphere by supplying excess solar radiation. However, the degree of these density changes is subjective if a geomagnetic storm persists simultaneously. The present case study addresses the ionospheric variations over the Indian longitudes under the combined effects of ... Bagiya, Mala; Thampi, Smitha; Hui, Debrup; Sunil, A.; Chakrabarty, D.; Choudhary, R.; Published by: Journal of Geophysical Research: Space Physics Published on: 08/2018 YEAR: 2018 DOI: 10.1029/2018JA025496 |
| 2017 |
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A new data set of summed neutral N2 and O number density profiles, spanning altitudes between 150 and 400\ km, and observed during Northern Winter from 2010 to 2016 is presented. The neutral density profiles are derived from solar occultation measurements made by the 0.1\textendash20\ nm Zr channel on the Large Yield Radiometer (LYRA) instrument on board Project for Onboard Autonomy 2 (PROBA2). The climatology derived from the vertical profiles is consistent with that predicted by the NRLMSISE-00 mode ... Thiemann, E.; Dominique, M.; Pilinski, M.; Eparvier, F.; Published by: Space Weather Published on: 12/2017 YEAR: 2017 DOI: 10.1002/2017SW001719 |
| 2016 |
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A case of the westward disturbance dynamo (DD) electric field, influencing the daytime equatorial and low-latitude ionosphere, during a geomagnetic storm that occurred on 28\textendash29 June 2013 is presented. The GPS total electron content (TEC) observations from a network of stations in the Indian equatorial, low and middle latitude regions along with the radio beacon TEC, ionosonde, and magnetic field observations are used to study the storm time behavior of the ionosphere. Negative ionospheric storm effects were seen ... Thampi, Smitha; Shreedevi, P.; Choudhary, R.; Pant, Tarun; Chakrabarty, D.; Sunda, S.; Mukherjee, S.; Bhardwaj, Anil; Published by: Journal of Geophysical Research: Space Physics Published on: 09/2016 YEAR: 2016 DOI: 10.1002/2016JA023037 |
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We studied the response of the ionosphere (F region) in the Brazilian sector during extreme space weather event of 17 March 2015 using a large network of 102 GPS- total electron content (TEC) stations. It is observed that the vertical total electron content (VTEC) was severely disturbed during the storm main and recovery phases. A wavelike oscillation with three peaks was observed in the TEC diurnal variation from equator to low latitudes during the storm main phase on 17\textendash18 March 2015. The latitudinal ... Fagundes, P.; Cardoso, F.; Fejer, B.; Venkatesh, K.; Ribeiro, B.; Pillat, V.; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2016 YEAR: 2016 DOI: 10.1002/2015JA022214 |
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The relative contributions of the composition disturbances and the disturbance electric fields in the redistribution of ionospheric plasma is investigated in detail by taking the case of a long-duration positive ionospheric storm that occurred during 18\textendash21 February 2014. GPS total electron content (TEC) data from the Indian Antarctic station, Bharti (69.4\textdegreeS, 76.2\textdegreeE geographic), the northern midlatitude station Hanle (32.8\textdegreeN, 78.9\textdegreeE geographic), northern low-latitude statio ... Shreedevi, P.; Thampi, Smitha; Chakrabarty, D.; Choudhary, R.; Pant, Tarun; Bhardwaj, Anil; Mukherjee, S.; Published by: Journal of Geophysical Research: Space Physics Published on: 02/2016 YEAR: 2016 DOI: 10.1002/2015JA021841 Geomagnetic storms; High latitude low latitude coupling; Ionosphere; positive ionospheric storm |
| 2015 |
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Use of radio occultation to probe the high-latitude ionosphere We have explored the use of COSMIC data to provide valuable scientific information on the ionospheric impacts of energetic particle precipitation during geomagnetic storms. Ionospheric electron density in the E region, and hence ionospheric conductivity, is significantly altered by precipitating particles from the magnetosphere. This has global impacts on the thermosphere\textendashionosphere because of the important role of conductivity on high-latitude Joule heating. Two high-speed stream (HSS) and two coronal mass ejec ... Mannucci, A.; Tsurutani, B.; Verkhoglyadova, O.; Komjathy, A.; Pi, X.; Published by: Atmospheric Measurement Techniques Published on: 07/2015 YEAR: 2015 DOI: 10.5194/amt-8-2789-2015 |
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Seasonal variability in global eddy diffusion and the effect on neutral density We describe a method for making single-satellite estimates of the seasonal variability in global-average eddy diffusion coefficients. Eddy diffusion values as a function of time were estimated from residuals of neutral density measurements made by the Challenging Minisatellite Payload (CHAMP) and simulations made using the thermosphere-ionosphere-mesosphere electrodynamics global circulation model (TIME-GCM). The eddy diffusion coefficient results are quantitatively consistent with previous estimates based on satellite dr ... Published by: Journal of Geophysical Research: Space Physics Published on: 04/2015 YEAR: 2015 DOI: 10.1002/2015JA021084 annual; eddy diffusion; neutral density; satellite drag; seasonal variability; semiannual |
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The Global Ultraviolet Imager (GUVI) onboard the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite senses far ultraviolet emissions from O and N2 in the thermosphere. Transformation of far ultraviolet radiances measured on the Earth limb into O, N2, and O2 number densities and temperature quantifies these responses and demonstrates the value of simultaneous altitude and geographic information. Composition and temperature variations are available from 2002 to 2007 ... Meier, R.; Picone, J.; Drob, D.; Bishop, J.; Emmert, J.; Lean, J.; Stephan, A.; Strickland, D.; Christensen, A.; Paxton, L.; Morrison, D.; Kil, H.; Wolven, B.; Woods, Thomas; Crowley, G.; Gibson, S.; Published by: Earth and Space Science Published on: 01/2015 YEAR: 2015 DOI: 10.1002/2014EA000035 airglow and aurora; remote sensing; thermosphere: composition and chemistry; thermosphere: energy deposition |
| 2014 |
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Attribution of interminima changes in the global thermosphere and ionosphere We present a statistical attribution analysis of the changes in global annual average thermospheric mass density and ionospheric total electron content (TEC) between the cycle 22/23 solar minimum (which occurred at epoch 1996.4) and the prolonged cycle 23/24 minimum (2008.8). The mass density data are derived from orbital drag, and the TEC data are derived from ground-based GPS receivers. The interminima change in mass density was -36\% relative to the 1996.4 yearly average. Considering each multiplicative forcing indepen ... Emmert, J.; McDonald, S.; Drob, D.; Meier, R.; Lean, J.; Picone, J.; Published by: Journal of Geophysical Research: Space Physics Published on: 08/2014 YEAR: 2014 DOI: 10.1002/2013JA019484 ionosphere total electron content; solar minimum; thermosphere mass density |
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Strong ionospheric field-aligned currents for radial interplanetary magnetic fields The present work has investigated the configuration of field-aligned currents (FACs) during a long period of radial interplanetary magnetic field (IMF) on 19 May 2002 by using high-resolution and precise vector magnetic field measurements of CHAMP satellite. During the interest period IMF By and Bz are weakly positive and Bx keeps pointing to the Earth for almost 10 h. The geomagnetic indices Dst is about -40 ... Wang, Hui; Lühr, Hermann; Shue, Jih-Hong; Frey, Harald.; Kervalishvili, Guram; Huang, Tao; Cao, Xue; Pi, Gilbert; Ridley, Aaron; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2014 YEAR: 2014 DOI: 10.1002/2014JA019951 air upwelling; field-aligned currents; radial interplanetary magnetic field |
| 2013 |
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Aerodynamic Analysis Based on Challenging Minisatellite Payload Satellite Lift-to-Drag Measurements A lift-to-drag ratio analysis is performed based on accelerometer measurements made by the Challenging Minisatellite Payload satellite to investigate the nature of gas-surface interactions taking place in orbit. The results described are for the November\ 2002 satellite yaw maneuver. At this time, the satellite flew at a mean altitude of 407\ km. Two types of gas\textendashsurface interaction are considered in the analysis. The first is a cosine (fully diffuse) reflection model with incomplete energy acc ...
Pilinski, Marcin; Argrow, Brian; Published by: Journal of Spacecraft and Rockets Published on: 11/2013 YEAR: 2013 DOI: 10.2514/1.A32394 |
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Theoretical tools for studies of low-frequency thermospheric variability [1]\ This paper supports studies of low-frequency variability (LFV) within the thermosphere by deriving approximate integral and closed-form solutions of a nontrivial model of thermospheric temperature, density, and composition depending on altitude and time. We also provide a paradigm for applying dimensional analysis in such studies. The domain is the region between the mesopause and the exobase. The solutions emphasize the connectedness of the thermosphere, i.e., nonlocal influences of LFV in key physical paramete ... Picone, J.; Meier, R.; Emmert, J.; Published by: Journal of Geophysical Research: Space Physics Published on: 09/2013 YEAR: 2013 DOI: 10.1002/jgra.v118.910.1002/jgra.50472 dimensional analysis; low frequency variation; Pi Theorem; seasonal variation; semi-annual variation; thermospheric variability |
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Semi-Empirical Satellite Accommodation Model for Spherical and Randomly Tumbling Objects Orbits of launch-vehicle upper stages and spheres were observed by U.S. Air Force Space Command, and the resulting observations were converted by the Space Analysis Office to fitted ballistic coefficients by comparing the observed orbit with an orbit predicted by an atmospheric-drag model. The ballistic coefficients contain signals that result from atmospheric variability not captured by the model as well as signals that correspond to changes in the satellite-drag coefficient. For objects in highly elliptical orbits with ... Pilinski, Marcin; Argrow, Brian; Palo, Scott; Bowman, Bruce; Published by: Journal of Spacecraft and Rockets Published on: 05/2013 YEAR: 2013 DOI: 10.2514/1.A32348 |
| 2012 |
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Spatial distribution of auroral precipitation during storms caused by magnetic clouds Yagodkina, O.I.; Despirak, I.V.; Vorobjev, V.G.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-03-2012 YEAR: 2012 DOI: 10.1016/j.jastp.2011.06.009 |
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Thayer, J.; Liu, X.; Lei, J.; Pilinski, M.; Burns, A.; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2012JA017832 |
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The main objective of the present investigation has been to compare the ionospheric parameters (NmF2 and hmF2) observed by two ground-based ionospheric sounders (one at PALMAS- located near the magnetic equator and the other at Sao Jose dos Campos-located in the low-latitude region) in the Brazilian sector with that by the satellite FORMOSAT-3/COSMIC radio occultation (RO) measurements during two geomagnetic storms which occurred in December 2006 and July 2009. It should be pointed out that in spite of increasing the lati ... Sahai, Y.; de Jesus, R.; Fagundes, P.R.; Selhorst, C.L.; de Abreu, A.J.; Ram, Tulasi; Aragon-Angel, A.; Pillat, V.G.; Abalde, J.R.; Lima, W.L.C.; Bittencourt, J.A.; Published by: Advances in Space Research Published on: 11/2012 YEAR: 2012 DOI: 10.1016/j.asr.2012.07.006 COSMIC satellite; F-region; geomagnetic storm; Ionosphere; Low solar activity |
| 2011 |
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Polekh, N.; Kushnarenko, G.; Pirog, O.; Kolpakova, O.; Kuznetsova, G.; Published by: Geomagnetism and Aeronomy Published on: Jan-12-2011 YEAR: 2011 DOI: 10.1134/S0016793211080251 |
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Marklund, G.; Sadeghi, S.; Cumnock, J.; Karlsson, T.; Lindqvist, P.-A.; Nilsson, H.; Masson, A.; Fazakerley, A.; Lucek, E.; Pickett, J.; Zhang, Y.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2011JA016537 |
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Global and regional trends in ionospheric total electron content Lean, J.; Emmert, J.; Picone, J.; Meier, R.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2010JA016378 |
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Ionospheric total electron content: Global and hemispheric climatology Lean, J.; Meier, R.; Picone, J.; Emmert, J.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2011JA016567 |
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Bagiya, Mala; Iyer, K.; Joshi, H.; Thampi, Smitha; Tsugawa, Takuya; Ravindran, Sudha; Sridharan, R.; Pathan, B.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2010JA015845 |
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Sahai, Y.; Fagundes, P.; de Jesus, R.; de Abreu, A.; Crowley, G.; Kikuchi, T.; Huang, C.-S.; Pillat, V.; Guarnieri, F.; Abalde, J.; Bittencourt, J.; Published by: Annales Geophysicae Published on: Jan-01-2011 YEAR: 2011 DOI: 10.5194/angeo-29-919-2011 |
| 2010 |
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Record-low thermospheric density during the 2008 solar minimum Emmert, J.; Lean, J.; Picone, J.; Published by: Geophysical Research Letters Published on: Jan-06-2010 YEAR: 2010 DOI: 10.1029/2010GL043671 |
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study of ionospheric response to magnetic superstorms in the East Asian sector Pirog, O.M.; Polekh, N.M.; Romanova, E.B.; Zherebtsov, G.A.; Shi, Jiankui; Wang, Xiao; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-02-2010 YEAR: 2010 DOI: 10.1016/j.jastp.2009.11.004 |
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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: |
| 2009 |
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The main ionospheric trough in the East Asian region: Observation and modeling Pirog, O.M.; Polekh, N.M.; Romanova, E.B.; Tashchilin, A.V.; Zherebtsov, G.A.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-01-2009 YEAR: 2009 DOI: 10.1016/j.jastp.2008.10.010 |
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Thermospheric infrared radiance at 4.3 μm is susceptible to the influence of solar-geomagnetic disturbances. Ionization processes followed by ion-neutral chemical reactions lead to vibrationally excited NO+ (i.e., NO+(v)) and subsequent 4.3 μm emission in the ionospheric E-region. Large enhancements of nighttime 4.3 μm emission were observed by the TIMED/SABER instrument during the April 2002 and October\textendashNovember 2003 solar storms. Global measurements of infrared 4.3 μm emission provide an excellent proxy to ... Mertens, Christopher; Winick, Jeremy; Picard, Richard; Evans, David; opez-Puertas, Manuel; Wintersteiner, Peter; Xu, Xiaojing; Mlynczak, Martin; Russell, James; Published by: Advances in Space Research Published on: |
| 2008 |
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Kurkin, V.; Polekh, N.; Pirog, O.; Poddel\textquoterightskii, I.; Stepanov, A.; Published by: Cosmic Research Published on: Jan-08-2008 YEAR: 2008 DOI: 10.1134/S0010952508040096 |
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Sahai, Y.; Becker-Guedes, F.; Fagundes, P.R.; Lima, W.L.C.; de Abreu, A.J.; Guarnieri, F.L.; Candido, C.M.N.; Pillat, V.G.; Published by: Published on: |
| 2007 |
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Becker-Guedes, F; Sahai, Y; Fagundes, PR; Espinoza, ES; Pillat, VG; Lima, WLC; Basu, Su; Basu, Sa; Otsuka, Y; Shiokawa, K; MacKenzie, E.; Bittencourt, J.; Published by: Published on: |
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Becker-Guedes, F; Sahai, Y; Fagundes, PR; Espinoza, ES; Pillat, VG; Lima, WLC; Basu, Su; Basu, Sa; Otsuka, Y; Shiokawa, K; MacKenzie, E.; Bittencourt, J.; Published by: Published on: |
| 2006 |
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Global thermosphere-ionosphere response to onset of 20 November 2003 magnetic storm Crowley, G.; Hackert, C.; Meier, R.; Strickland, D.; Paxton, L.; Pi, X.; Mannucci, A.; Christensen, A.; Morrison, D.; Bust, G.; Roble, R.; Curtis, N.; Wene, G.; Published by: Journal of Geophysical Research Published on: Jan-01-2006 YEAR: 2006 DOI: 10.1029/2005JA011518 |
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Thermospheric densities derived from spacecraft orbits: Application to the Starshine satellites Lean, J.; Picone, J.; Emmert, J.; Moore, G.; Published by: Journal of Geophysical Research Published on: Jan-01-2006 YEAR: 2006 DOI: 10.1029/2005JA011399 |
| 2005 |
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The global ionospheric asymmetry in total electron content Mendillo, Michael; Huang, Chia-Lin; Pi, Xiaoqing; Rishbeth, Henry; Meier, Robert; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-10-2005 YEAR: 2005 DOI: 10.1016/j.jastp.2005.06.021 |
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Energy transport in the thermosphere during the solar storms of April 2002 Mlynczak, Martin; Martin-Torres, Javier; Crowley, Geoff; Kratz, David; Funke, Bernd; Lu, Gang; Lopez-Puertas, Manuel; Russell, James; Kozyra, Janet; Mertens, Chris; Sharma, Ramesh; Gordley, Larry; Picard, Richard; Winick, Jeremy; Paxton, L.; Published by: Journal of Geophysical Research Published on: Jan-01-2005 YEAR: 2005 DOI: 10.1029/2005JA011141 |
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Rishbeth, H.; Meddillo, M.; Huang, C.-L.; Pi, X.; Meier, R.; Published by: Journal of Geophysical Research-Part A-Space Physics Published on: 11/2005 |
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Global Thermosphere-Ionosphere Response to Geomagnetic Storms Crowley, G.; Hackert, C.; Meier, R.; Strickland, D.; Paxton, L.; Pi, X.; Manucci, A.; Christensen, A.; Morrison, D.; Bust, G.; Roble, R.; Curtis, N.; Published by: Published on: |
| 2004 |
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The SABER instrument on TIMED continuously measures certain infrared limb radiance profiles with unprecedented sensitivity. Among these are emissions of CO2 ν3 at 4.3 μm, routinely recorded to tangent heights of ~140-150 km, and NO at 5.3 μm, seen to above ~200 km and ~300 km, respectively. We use these infrared channels of SABER and coincident far ultraviolet (FUV) measurements from GUVI on TIMED, to study the geometric storm of April 2002. These all give a consistent measure of auroral energy in ... Winick, Jeremy; Mlynczak, Martin; Wintersteiner, Peter; Martin-Torres, Francisco; Picard, Richard; Paxton, L.; Lopez-Puertas, Manuel; Russell, James; Christensen, Andrew; Gordley, Larry; Published by: Published on: YEAR: 2004 DOI: 10.1117/12.515982 |
| 2003 |
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The ionospheric response to the magnetic storm of 15 July 2000 is investigated using the global total electron content (TEC) maps provided by global positioning system and the measurements of ion density, composition, and drift velocity from the Defense Meteorological Satellite Program (DMSP) F13 and F15 spacecraft. The global TEC maps showed clear seasonal effects that can be characterized by a dominance of a negative ionospheric storm (decrease in plasma density) in the summer (northern) hemisphere and the pronounced po ... Kil, Hyosub; Paxton, L.; Pi, X.; Hairston, M.; Zhang, Y.; Published by: Journal of Geophysical Research Published on: 11/2003 YEAR: 2003 DOI: 10.1029/2002JA009782 ionosphere-thermosphere coupling; Ionospheric storm; thermospheric disturbance |
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The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment on the Thermosphere-Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite observed the infrared radiative response of the thermosphere to the solar storm events of April 2002. Large radiance enhancements were observed at 5.3 μm, which are due to emission from the vibration-rotation bands of nitric oxide (NO). The emission by NO is indicative of the conversion of solar energy to infrared radiation within the atmosphere and repr ... Mlynczak, Marty; Martin-Torres, F.; Russell, J.; Beaumont, K.; Jacobson, S.; Kozyra, J.; opez-Puertas, M.; Funke, B.; Mertens, C.; Gordley, L.; Picard, R.; Winick, J.; Wintersteiner, P.; Paxton, L.; Published by: Geophysical Research Letters Published on: 03/2003 YEAR: 2003 DOI: 10.1029/2003GL017693 |
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Winick, J.; Mlynczak, M.; Wintersteiner, P.; Martin-Torres, F.-J.; Picard, R.; Paxton, L.; opez-Puertas, M.; Russell, J.; Christensen, A.; Gordley, L.; Published by: Published on: |
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