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Found 672 entries in the Bibliography.
Showing entries from 501 through 550
| 2009 |
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Plasma probe data from DMSP-F13, DMSP-F15 and DEMETER satellites were used to examine longitudinal structures in the topside equatorial ionosphere during fall equinox conditions of 2004 year. Since the launch of DEMETER satellite on 29 June 2004, all these satellites operate close together in the topside ionosphere. Here, data taken from\ Special Sensor-Ion, Electron and Scintillations\ (SSIES) instruments on board DMSP-F13, F15 and\ Instrument Analyser de Plasma\ (IAP) on DEMETER, ar ... Bankov, L.; Heelis, R.; Parrot, M.; Berthelier, J.-J.; Marinov, P.; Vassileva, A.; Published by: Annales Geophysicae Published on: Jan-01-2009 YEAR: 2009 DOI: 10.5194/angeo-27-2893-2009 |
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Plasma probe data from DMSP-F13, DMSP-F15 and DEMETER satellites were used to examine longitudinal structures in the topside equatorial ionosphere during fall equinox conditions of 2004 year. Since the launch of DEMETER satellite on 29 June 2004, all these satellites operate close together in the topside ionosphere. Here, data taken from\ Special Sensor-Ion, Electron and Scintillations\ (SSIES) instruments on board DMSP-F13, F15 and\ Instrument Analyser de Plasma\ (IAP) on DEMETER, ar ... Bankov, L.; Heelis, R.; Parrot, M.; Berthelier, J.-J.; Marinov, P.; Vassileva, A.; Published by: Annales Geophysicae Published on: Jan-01-2009 YEAR: 2009 DOI: 10.5194/angeo-27-2893-2009 |
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Formation of a plasma depletion shell in the equatorial ionosphere An accurate description of the irregularity region defined by a plasma bubble is critically important in understanding the dynamics of the region and its effects on radio scintillation. Here we describe a plasma depletion region as a \textquotedblleftdepletion shell\textquotedblright and show how two-dimensional optical images from space can be used to define the shape of the depletion shell. Our simple model calculation demonstrates that the space-based optical observation can detect the plasma-depleted magnetic flux tub ... Kil, Hyosub; Heelis, Roderick; Paxton, Larry; Oh, Seung-Jun; Published by: Journal of Geophysical Research Published on: 11/2009 YEAR: 2009 DOI: 10.1029/2009JA014369 Equatorial ionosphere; plasma depletion shell; zonal shear flow |
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Sun-to-Earth Imaging for Operational Space Weather Monitoring
Chua, DH; Wood, BE; Slinker, SP; Meier, RR; Englert, CR; Socker, DG; Huba, J; Krall, J; Published by: Published on: |
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Chu, X; Collins, RL; Stevens, MH; Plane, JM; Meier, RR; Deland, MT; Kelley, MC; Nicolls, MJ; Thurairajah, B; Varney, RH; , others; Published by: Published on: |
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Putting Space Physics Data Facility (SPDF) Services to Good Use
Candey, RM; Bilitza, D; Chimiak, R; Cooper, JF; Garcia, LN; Harris, B; Johnson, RC; King, JH; Kovalick, T; Leckner, H; , others; Published by: Published on: |
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Putting Space Physics Data Facility (SPDF) Services to Good Use
Candey, RM; Bilitza, D; Chimiak, R; Cooper, JF; Garcia, LN; Harris, B; Johnson, RC; King, JH; Kovalick, T; Leckner, H; , others; Published by: Published on: |
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Ionospheric control of auroral occurrence
Kan, Liou; Yongliang, Zhang; Patrick, Newell; Larry, Paxton; Published by: Published on: |
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Observations of the Ionosphere Using the Tiny Ionospheric Photometer.
Coker, Clayton; Dymond, Kenneth; Budzien, Scott; Chua, Damien; Liu, Jann-Yenq; Anderson, David; Basu, Sunanda; Pedersen, Todd; Published by: Terrestrial, Atmospheric \& Oceanic Sciences Published on: |
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Zhang, Man-Lian; Wan, Weixing; Liu, Libo; Ning, Baiqi; Published by: Advances in Space Research Published on: |
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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: |
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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: |
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Ionospheric control of auroral occurrence
Liou, Kan; Zhang, Yongliang; Newell, Patrick; Paxton, Larry; Published by: Published on: |
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The Ionospheric Mid-Latitude Summer Nighttime Anomaly This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime (19:00 LT - 24:00 LT, or period of larger solar zenith angles) ionospheric electron density than that during daytime (08:00 - 18:00 LT, or period of smaller solar zenith angles) at middle latitudes during solstices. The anomaly sh ... Lin, C; Chen, C; Hsu, M; Liu, CH; Liu, JG; Burns, AG; Wang, W; Published by: Published on: |
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The Ionospheric Mid-Latitude Summer Nighttime Anomaly This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime (19:00 LT - 24:00 LT, or period of larger solar zenith angles) ionospheric electron density than that during daytime (08:00 - 18:00 LT, or period of smaller solar zenith angles) at middle latitudes during solstices. The anomaly sh ... Lin, C; Chen, C; Hsu, M; Liu, CH; Liu, JG; Burns, AG; Wang, W; Published by: Published on: |
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The Ionospheric Mid-Latitude Summer Nighttime Anomaly This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime (19:00 LT - 24:00 LT, or period of larger solar zenith angles) ionospheric electron density than that during daytime (08:00 - 18:00 LT, or period of smaller solar zenith angles) at middle latitudes during solstices. The anomaly sh ... Lin, C; Chen, C; Hsu, M; Liu, CH; Liu, JG; Burns, AG; Wang, W; Published by: Published on: |
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In the descent to solar minimum in solar cycle 23-24, the high-speed streams (HSS) were faster and longer lived than previous cycles but the average IMF was weaker and the average solar wind density lower than ever before recorded upstream of the Earth. A simulation of high speed stream activity on 22-24 January 2005 using the BATS-R-US MHD model with embedded Rice Convection Model driven by solar wind inputs indicates that, at least for this event, the interaction between high speed streams and the magnetosphere has been mo ... Kozyra, JU; Brandt, PC; Buzulukova, N; de Zeeuw, D; Fok, MH; Frey, HU; Gibson, SE; Ilie, R; Liemohn, MW; Mende, SB; , others; Published by: Published on: |
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In the descent to solar minimum in solar cycle 23-24, the high-speed streams (HSS) were faster and longer lived than previous cycles but the average IMF was weaker and the average solar wind density lower than ever before recorded upstream of the Earth. A simulation of high speed stream activity on 22-24 January 2005 using the BATS-R-US MHD model with embedded Rice Convection Model driven by solar wind inputs indicates that, at least for this event, the interaction between high speed streams and the magnetosphere has been mo ... Kozyra, JU; Brandt, PC; Buzulukova, N; de Zeeuw, D; Fok, MH; Frey, HU; Gibson, SE; Ilie, R; Liemohn, MW; Mende, SB; , others; Published by: Published on: |
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Gyroless-extending the TIMED mission The TIMED spacecraft is now it its eighth year of a two-year mission, amassing an unprecedented, uninterrupted collection of upper atmospheric data. Over the course of this time, degradation of the gyros has forced the need to allow operation without them. As a result, the attitude estimation algorithms have been enhanced to allow continued operation under gyroless conditions. This paper describes the algorithms implemented to perform attitude estimation with a tracker-only solution, as well as operational issues encountered ... Published by: Published on: YEAR: 2009 DOI: 10.2514/6.2009-5948 |
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Ionospheric response to the geomagnetic storm on 13–17 April 2006 in the West Pacific region This paper presents an investigation of geomagnetic storm effects in the equatorial and middle-low latitude F-region in the West Pacific sector during the intense geomagnetic storm on 13–17 April, 2006. The event, preceded by a minor storm, started at 2130 UT on April 13 while interplanetary magnetic field (IMF) Bz component was ready to turn southward. From 14–17 the ionosphere was characterized by a large scale enhancement in critical frequency, foF2 (4∼6MHz) and total electron content (TEC) (∼30TECU, 1TECU=1×1016 ... Zhao, Biqiang; Wan, Weixing; Liu, Libo; Igarashi, K.; Yumoto, K.; Ning, Baiqi; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: YEAR: 2009 DOI: https://doi.org/10.1016/j.jastp.2008.09.029 |
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UV radiation from the night-time atmosphere seen from the “Universitetsky-Tatiana” satellite Detectors on the "Universitetsky-Tatiana" satellite measured a smoothly varying intensity of UV radiation from the night-time atmosphere in the nadir direction and the intensity of the energetic electron flux at the orbit. At high latitudes the UV intensity in the auroral oval is interpreted as being due to electrons penetrating into the atmosphere. At middle latitudes the UV intensity is an order of magnitude less and more data are needed to reveal the origin of this radiation. Millisecond flashes of UV radiation were obser ... Dmitriev, AV; Garipov, GK; Grigoryan, OR; Khrenov, BA; Klimov, PA; Lazutin, LL; Myagkova, IN; Petrov, AN; Petrov, VL; Panasyuk, MI; , others; Published by: Published on: YEAR: 2009 DOI: 10.1063/1.3137703 |
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Ionospheric Electron Density Concurrently Derived by TIP and GOX of FORMOSAT-3/COSMIC. The tiny ion o spheric pho tom e ter (TIP) and GPS occultation ex per i ment (GOX) onboard FORMOSAT-3/COS MIC (F3/C) are em ployed to mea sure the OI 135.6 nm in ten si ties in Hsu, Mei-Lan; Rajesh, Panthalingal; Liu, Jann-Yenq; Tsai, Lung-Chih; Tsai, Ho-Fang; Lin, Chien-Hung; Dymond, Kenneth; Coker, Clayton; Chua, Damien; Budzien, Scott; , others; Published by: Terrestrial, Atmospheric \& Oceanic Sciences Published on: YEAR: 2009 DOI: 10.3319/TAO.2008.04.24.02(F3C) |
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Ionospheric Electron Density Concurrently Derived by TIP and GOX of FORMOSAT-3/COSMIC. The tiny ion o spheric pho tom e ter (TIP) and GPS occultation ex per i ment (GOX) onboard FORMOSAT-3/COS MIC (F3/C) are em ployed to mea sure the OI 135.6 nm in ten si ties in Hsu, Mei-Lan; Rajesh, Panthalingal; Liu, Jann-Yenq; Tsai, Lung-Chih; Tsai, Ho-Fang; Lin, Chien-Hung; Dymond, Kenneth; Coker, Clayton; Chua, Damien; Budzien, Scott; , others; Published by: Terrestrial, Atmospheric \& Oceanic Sciences Published on: YEAR: 2009 DOI: 10.3319/TAO.2008.04.24.02(F3C) |
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Ram, Tulasi; Su, S-Y; Liu, CH; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Global Ionospheric Structure Imaged by FORMOSAT-3/COSMIC: Early Results. A new era of study ing the ion o spheric space weather ef fects has come af ter launch of the in no va tive sat el lite con stel la tion, named as Formosa Sat el lite 3 or Con stel la tion Ob Lin, Chien-Hung; Liu, Jann-Yenq; Hsiao, Chun-Chieh; Liu, Chao-Han; Cheng, Chio-Zong; Chang, Po-Ya; Tsai, Ho-Fang; Fang, Tzu-Wei; Chen, Chia-Hung; Hsu, Mei-Lan; Published by: Terrestrial, Atmospheric \& Oceanic Sciences Published on: |
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Global Ionospheric Structure Imaged by FORMOSAT-3/COSMIC: Early Results. A new era of study ing the ion o spheric space weather ef fects has come af ter launch of the in no va tive sat el lite con stel la tion, named as Formosa Sat el lite 3 or Con stel la tion Ob Lin, Chien-Hung; Liu, Jann-Yenq; Hsiao, Chun-Chieh; Liu, Chao-Han; Cheng, Chio-Zong; Chang, Po-Ya; Tsai, Ho-Fang; Fang, Tzu-Wei; Chen, Chia-Hung; Hsu, Mei-Lan; Published by: Terrestrial, Atmospheric \& Oceanic Sciences Published on: |
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Global Ionospheric Structure Imaged by FORMOSAT-3/COSMIC: Early Results. A new era of study ing the ion o spheric space weather ef fects has come af ter launch of the in no va tive sat el lite con stel la tion, named as Formosa Sat el lite 3 or Con stel la tion Ob Lin, Chien-Hung; Liu, Jann-Yenq; Hsiao, Chun-Chieh; Liu, Chao-Han; Cheng, Chio-Zong; Chang, Po-Ya; Tsai, Ho-Fang; Fang, Tzu-Wei; Chen, Chia-Hung; Hsu, Mei-Lan; Published by: Terrestrial, Atmospheric \& Oceanic Sciences Published on: |
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GCITEM-IGGCAS: A new global coupled ionosphere–thermosphere-electrodynamics model The Global Coupled Ionosphere–Thermosphere-Electrodynamics Model developed at Institute of Geology and Geophysics, Chinese Academy of Sciences (GCITEM-IGGCAS), is introduced in this paper. This new model self-consistently calculates the time-dependent three-dimensional (3-D) structures of the main thermospheric and ionospheric parameters in the height range from 90 to 600km, including neutral number density of major species O2, N2, and O and minor species N(2D), N(4S), NO, He and Ar; ion number densities of O+ ,O2+, N2+, N ... Ren, Zhipeng; Wan, Weixing; Liu, Libo; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: YEAR: 2009 DOI: https://doi.org/10.1016/j.jastp.2009.09.015 thermosphere; Ionosphere; Modeling; Global circulation models |
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Empirical modeling of the ring current By using theoretical models of plasma dynamics, it is possible to reconstruct the evolution of many magnetospheric processes; nevertheless, these models need the support of both electric and magnetic field models, and they can simulate known processes only. Conversely, the empirical models are mainly based on statistical analysis; hence, they start from observations, not from processes. Statistical analyses and the derived empirical models are important complements to theoretical models and simulations since the former repre ... Milillo, Anna; Orsini, Stefano; Published by: Acta Geophysica Published on: YEAR: 2009 DOI: 10.2478/s11600-008-0063-5 |
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Coherent omnipresent fluctuations in the ionosphere Incoherent Scatter Radar power observations at Arecibo, Millstone Hill, and the Poker Flat AMISR have revealed the continuous presence of Coherent Omnipresent Fluctuations in the Ionosphere (COFIs) with periods ranging from roughly 30 to 60 minutes and apparent vertical wavelengths increasing with altitude from tens to hundreds of km. Published by: Published on: |
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Ionospheric response to the geomagnetic storm on 13—17 April 2006 in the West Pacific region
Zhao, Biqiang; Wan, Weixing; Liu, Libo; Igarashi, K; Yumoto, K; Ning, Baiqi; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: |
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The Production of Titan’s Far Ultraviolet Nitrogen Airglow
Stevens, Michael; Gustin, Jacques; Ajello, Joseph; Evans, Scott; Meier, RR; Stephan, Andrew; Stewart, Ian; Larsen, Kristopher; Esposito, Larry; McClintock, William; Published by: Space Published on: |
| 2008 |
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Photoelectron flux variations observed from the FAST satellite This paper examines high resolution (ΔE/E\ =\ 0.15) photoelectron energy spectra from 10\ eV to 1\ keV, created by solar irradiances between 1.2 and 120\ nm. The observations were made from the FAST satellite at \~3000\ km, equatorward of the auroral oval for the July\textendashAugust, 2002 solar rotation. These data are compared with the solar irradiance observed by the Solar EUV Experiment (SEE) on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) sat ... Peterson, W.K.; Woods, T.N.; Chamberlin, P.C.; Richards, P.G.; Published by: Advances in Space Research Published on: Jan-09-2008 YEAR: 2008 DOI: 10.1016/j.asr.2007.08.038 |
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XUV Photometer System (XPS): Improved Solar Irradiance Algorithm Using CHIANTI Spectral Models
Woods, Thomas; Chamberlin, Phillip; Peterson, W.; Meier, R.; Richards, Phil; Strickland, Douglas; Lu, Gang; Qian, Liying; Solomon, Stanley; Iijima, B.; Mannucci, A.; Tsurutani, B.; Published by: Solar Physics Published on: Jan-08-2008 YEAR: 2008 DOI: 10.1007/s11207-008-9196-6 |
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Longitudinal variability of low-latitude total electron content: Tidal influences
Scherliess, L.; Thompson, D.; Schunk, R.; Published by: Journal of Geophysical Research Published on: Jan-01-2008 YEAR: 2008 DOI: 10.1029/2007JA012480 |
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Liu, Huixin; Watanabe, Shigeto; Published by: Journal of Geophysical Research Published on: Jan-01-2008 YEAR: 2008 DOI: 10.1029/2008JA013027 |
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The Spread F Experiment, or SpreadFEx, was performed from September to November 2005 to define the potential role of neutral atmosphere dynamics, primarily gravity waves propagating upward from the lower atmosphere, in seeding equatorial spread F (ESF) and plasma bubbles extending to higher altitudes. A description of the SpreadFEx campaign motivations, goals, instrumentation, and structure, and an overview of the results presented in this special issue, are provided by Fritts et al. (2008a). The various analyses of neutr ... Fritts, D.; Vadas, S.; Riggin, D.; Abdu, M.; Batista, I.; Takahashi, H.; Medeiros, A.; Kamalabadi, F.; Liu, H.-L.; Fejer, B.; Taylor, M.; Published by: Annales Geophysicae Published on: 10/2008 YEAR: 2008 DOI: 10.5194/angeo-26-3235-2008 |
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Eastes, R; Burns, AG; McClintock, W; Aksnes, A; Anderson, D; Andersson, L; Budzien, S; Codrescu, M; Daniell, R; England, S; , others; Published by: Published on: |
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Eastes, RW; Anderson, DN; McClintock, WE; Aksnes, A; Andersson, L; Burns, AG; Budzien, SA; Codrescu, MV; Daniell, RE; Dymond, KF; , others; Published by: Published on: |
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Kil, H; Paxton, LJ; Heelis, RA; Published by: Published on: |
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Hecht, JH; Mulligan, T; Strickland, DJ; Kochenash, AJ; Murayama, Y; Tanaka, Y-M; Evans, DS; Conde, MG; Donovan, EF; Rich, FJ; , others; Published by: Journal of Geophysical Research: Space Physics Published on: |
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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: |
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The OI 135.6 nm Observations of the Weddell Sea Anomaly and the Nighttime Mid-Latitude Enhancement
Hsu, M; Liu, J; Lin, C; Tsai, H; Rajesh, P; Paxton, L; Hsu, R; Su, H; Published by: Published on: |
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The OI 135.6 nm Observations of the Weddell Sea Anomaly and the Nighttime Mid-Latitude Enhancement
Hsu, M; Liu, J; Lin, C; Tsai, H; Rajesh, P; Paxton, L; Hsu, R; Su, H; Published by: Published on: |
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Zhao, B; Wan, W; Liu, L; Mao, T; Ren, Z; Wang, M; Christensen, AB; Published by: Published on: |
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Previous ground observations have revealed a correlation that exists between equatorial plasma bubbles, evening equatorial ionization anomaly (EIA), and prereversal E × B drift velocity using latitudinal arrays of ionospheric sounders, such as in the Indian and American regions. Besides the ground measurements, the space-based observations also provide a convenient way to study the global-scale variations. Li, Guozhu; Ning, Baiqi; Liu, Libo; Zhao, Biqiang; Yue, Xinan; Su, S-Y; Venkatraman, Sarita; Published by: Radio Science Published on: YEAR: 2008 DOI: 10.1029/2007RS003760 |
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Previous ground observations have revealed a correlation that exists between equatorial plasma bubbles, evening equatorial ionization anomaly (EIA), and prereversal E × B drift velocity using latitudinal arrays of ionospheric sounders, such as in the Indian and American regions. Besides the ground measurements, the space-based observations also provide a convenient way to study the global-scale variations. Li, Guozhu; Ning, Baiqi; Liu, Libo; Zhao, Biqiang; Yue, Xinan; Su, S-Y; Venkatraman, Sarita; Published by: Radio Science Published on: YEAR: 2008 DOI: 10.1029/2007RS003760 |
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Ionospheric storm time dynamics as seen by GPS tomography and in situ spacecraft observations During major geomagnetic storms anomalous enhancements of the ionospheric density are seen at high and middle latitudes. A number of physical mechanisms have been invoked to explain these storm time density anomalies including an expansion of high-latitude electric plasma convection to midlatitudes, thermospheric neutral winds, and changes in the ionospheric composition. However, it remains unclear which mechanism plays the dominant role in the formation of storm time density anomalies, partly because of insufficient coverag ... Pokhotelov, D.; Mitchell, C.; Spencer, P.; Hairston, M.; Heelis, R.; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2008 DOI: https://doi.org/10.1029/2008JA013109 |
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Oscillations of the equatorward boundary of the ion auroral oval – radar observations Three SuperDARN radars in the afternoon-midnight sector of the auroral oval detected a boundary oscillation, originating near ∼1800 MLT sector. Analysis of the phase of the oscillations measured in three meridians indicates that the disturbance has a longitudinally (azimuthally) isolated source and away from which it propagates. The eastward and westward phase speeds are 2.6 and 3.6 km/s respectively and the period is roughly 28 minutes. An examination of the geo-synchronous magnetic field inclination also revealed oscilla ... Jayachandran, P.; Sato, N.; Ebihara, Y.; Yukimatu, A.; Kadokura, A.; MacDougall, J.; Donovan, E.; Liou, K.; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2008 DOI: https://doi.org/10.1029/2007JA012870 |
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F-region plasma dynamics has been one of the main foci of the ionospheric research community for decades. The mid-latitude F-region has been considered to be relatively calm; Seker, Ilgin; Livneh, Dorey; Makela, Jonathan; Mathews, John; Published by: Earth, planets and space Published on: YEAR: 2008 DOI: https://doi.org/10.1186/BF03353127 |