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Found 189 entries in the Bibliography.
Showing entries from 51 through 100
| 2020 |
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In this article, we present a study of the perturbations occurring in the Earth’s environment on 7 October 2015. We use a multi-instrument approach, including space and ground Molina, Maria; Dasso, S; Mansilla, G; Namour, Jorge; Cabrera, Miguel; Zuccheretti, Enrico; Published by: Solar Physics Published on: YEAR: 2020 DOI: 10.1007/s11207-020-01728-7 |
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This paper aims to study the foF2 seasonal asymmetry diurnal variation at Dakar station from 1976 to 1995. We show that equinoctial asymmetry is less pronounced and somewhere is Sandwidi, Sibri; Gnabahou, Doua; Ouattara, Fr\; Published by: International Journal of Geophysics Published on: YEAR: 2020 DOI: 10.1155/2020/8896188 |
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Global navigation satellites systems provide real time positioning and timing services more efficiently and effectively. The ionosphere is one dynamic layer that affects the Published by: Journal of Computational and Theoretical Nanoscience Published on: YEAR: 2020 DOI: 10.1166/jctn.2020.9020 |
| 2019 |
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Radiative cooling due to NO at 5.3 The effect of geomagnetic storms on the peak emission of NO Volume Emission Rate (NO VER) at 5.3 m, in mesosphere and lower thermosphere (MLT) region, is studied over the Asian sector during 26\textendash29 September 2011 (storm 1) and 18\textendash21 February 2014 (storm 2). The data for peak emission of NO VER is obtained from SABER instrument onboard the NASA\textquoterights TIMED satellite. The SABER retrieved data along with the neutral densities obtained from NRLMSISE-00 model have been used to study the latitudinal ... Bharti, Gaurav; Krishna, M.V.; Singh, Vir; Published by: Advances in Space Research Published on: 11/2019 YEAR: 2019 DOI: 10.1016/j.asr.2019.07.016 |
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Inferring thermospheric composition from ionogram profiles: A calibration with the TIMED spacecraft Measurements of thermospheric composition via ground-based instrumentation are challenging to make and so details about this important region of the upper atmosphere are currently sparse. We present a technique thatdeducesquantitative estimates of thermospheric composition from ionospheric data, for which there is a global network of stations. The visibility of the F1 peak in ionospheric soundings from ground-based instrumentation is a sensitive function of thermospheric composition. The ionospheric profile in the transit ... Scott, Christopher; Jones, Shannon; Barnard, Luke; Published by: Annales Geophysicae Discussions Published on: 03/2019 YEAR: 2019 DOI: 10.5194/angeo-2019-4710.5194/angeo-2019-47-RC110.5194/angeo-2019-47-RC2 |
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As part of its International Capabilities Assessment effort, the Community Coordinated Modeling Center initiated several working teams, one of which is focused on the validation of models and methods for determining auroral electrodynamic parameters, including particle precipitation, conductivities, electric fields, neutral density and winds, currents, Joule heating, auroral boundaries, and ion outflow. Auroral electrodynamic properties are needed as input to space weather models, to test and validate the accuracy of phys ... Robinson, Robert; Zhang, Yongliang; Garcia-Sage, Katherine; Fang, Xiaohua; Verkhoglyadova, Olga; Ngwira, Chigomezyo; Bingham, Suzy; Kosar, Burcu; Zheng, Yihua; Kaeppler, Stephen; Liemohn, Michael; Weygand, James; Crowley, Geoffrey; Merkin, Viacheslav; McGranaghan, Ryan; Mannucci, Anthony; Published by: Space Weather Published on: 01/2019 YEAR: 2019 DOI: 10.1029/2018SW002127 |
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Bambach-Ortiz, Nicolas; Kustas, William; McElrone, Andrew; Alsina, Maria; Published by: Published on: |
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Aeronomy: General Contributions I Posters
Nikoukar, Romina; Lee, Christina; MacDonald, Elizabeth; Published by: Published on: |
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Research Progress on On-Orbit Calibration Technology for Far Ultraviolet Payload
Li-ping, Fu; Nan, Jia; Xiu-qing, Hu; Tian, Mao; Fang, Jiang; Yun-gang, Wang; Ru-yi, Peng; Tian-fang, Wang; Da-xin, Wang; Shuang-tuan, Dou; , others; Published by: Published on: |
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Naidu, Peddi; Latha, Madhavi; Devi, Indira; Published by: GEOMAGNETISM AND AERONOMY Published on: |
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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: |
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The GUVI data are provided through support from the NASA MO&DA program. The GUVI instrument was designed and built by The Aerospace Corporation and The Johns Hopkins Padokhin, AM; Tereshin, NA; Yasyukevich, Yu; Andreeva, ES; Nazarenko, MO; Yasyukevich, AS; Kozlovtseva, EA; Kurbatov, GA; Published by: Advances in Space Research Published on: YEAR: 2019 DOI: 10.1016/j.asr.2018.08.001 |
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Spatial Resolution of Equatorial Plasma Depletions Using Variable-Range Time-Delay Integration Equatorial spread-F, also termed plasma bubbles, is a phenomenon that occurs in the equatorial region of Earth’s ionosphere, the charged region of Earth’s atmosphere. Plumes of less dense plasma, the charged material of the Ionosphere, rise through regions of higher density plasma. This causes disturbances to radio signals that travel through this region, which can lead to GPS range errors or loss of signal. ICON is a NASA Explorer mission aimed at, in part, understanding the sources of variability in the ionosphere. One ... Published by: Published on: |
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On the difference between real-time and research simulations with CTIPe Understanding the thermosphere and ionosphere conditions is crucial for spacecraft operations and many applications using radio signal transmission (e.g. in communication and navigation). In this sense, physics based modelling plays an important role, since it can adequately reproduce the complex coupling mechanisms in the magnetosphere-ionosphere-thermosphere (MIT) system. The accuracy of the physics based model results does not only depend on the appropriate implementation of the physical processes, but also on the quality ... Fernandez-Gomez, Isabel; Fedrizzi, Mariangel; Codrescu, Mihail; Borries, Claudia; Fillion, Martin; Fuller-Rowell, Timothy; Published by: Advances in Space Research Published on: YEAR: 2019 DOI: 10.1016/j.asr.2019.02.028 |
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Radiative cooling due to NO at 5.3 $\mu$m emission as observed by TIMED/SABER over Asian sector The effect of geomagnetic storms on the peak emission of NO Volume Emission Rate (NO VER) at 5.3 μ m, in mesosphere and lower thermosphere (MLT) region, is studied over the Bharti, Gaurav; Krishna, MV; Singh, Vir; Published by: Advances in Space Research Published on: YEAR: 2019 DOI: 10.1016/j.asr.2019.07.016 |
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Space weather forecasting: What we know now and what are the current and future challenges Geomagnetic storms are caused by solar wind southward magnetic fields that impinge upon the Earth’s magnetosphere (Dungey, 1961). How can we forecast the occurrence of these interplanetary events? We view this as the most important challenge in Space Weather. We discuss the case for magnetic clouds (MCs), interplanetary sheaths upstream of ICMEs, corotating interaction regions (CIRs) and high speed streams (HSSs). The sheath- and CIR-related magnetic storms will be difficult to predict and will require better knowledge of ... Tsurutani, Bruce; Lakhina, Gurbax; Hajra, Rajkumar; Published by: Nonlinear Processes Geophys. Discuss Published on: |
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SIHlA-Spatial/spectral imaging of hydrogen Lyman alpha
Paxton, L; Roelof, E; Lisse, C; Vervack, R; McNutt, R; Provornikova, E; Cox, A; Dyster, J; Gruntman, M; Katushkina, O; , others; Published by: Published on: |
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Zhang, Yongliang; Paxton, Larry; Robinson, Robert; MacDonald, Elizabeth; Mitchell, Elizabeth; Published by: Published on: |
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Bambach, Nicolas; Kustas, William; McElrone, Andrew; Alsina, Maria; Published by: Published on: |
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Critical issues in ionospheric data quality and implications for scientific studies
Araujo-Pradere, E; Weatherhead, EC; Dandenault, PB; Bilitza, D; Wilkinson, P; Coker, C; Akmaev, R; Beig, G; a, Bure\^sov\; Paxton, LJ; , others; Published by: Radio Science Published on: |
| 2018 |
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Observation of equatorial plasma bubbles by the airglow imager on ISS-IMAP Using 630 nm airglow data observed by an airglow imager on the International Space Station (ISS), the occurrence of equatorial plasma bubbles (EPBs) is studied. In order to examine the physical mechanisms in the boundary region between the Earth and the outer space, an ionosphere, mesosphere, upper atmosphere, and plasmasphere mapping (IMAP) mission had been conducted onboard the ISS since October 2012. The visible light and infrared spectrum imager (VISI) is utilized in the ISS-IMAP mission for nadir-looking observation ... Nakata, Hiroyuki; Takahashi, Akira; Takano, Toshiaki; Saito, Akinori; Sakanoi, Takeshi; Published by: Progress in Earth and Planetary Science Published on: 12/2018 YEAR: 2018 DOI: 10.1186/s40645-018-0227-0 |
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Space Weather Events, Hurricanes, and Earthquakes in Mexico in September 2017 In the interval of 4\textendash10 September 2017, the Sun presented multiple solar flares from active region AR 2673. There were also coronal mass ejections that interacted with the Earth\textquoterights magnetosphere. This solar activity produced several space weather events. These events were observed with ground-based instruments of the Mexican Space Weather Service. The Mexican Array RadioTelescope detected highly perturbed solar transits associated with Type I radio emissions from active regions. The Compact Astronom ... Gonzalez-Esparza, J.; Sergeeva, M.; Corona-Romero, P.; Mejia-Ambriz, J.; Gonzalez, L.; De la Luz, V.; Aguilar-Rodriguez, E.; Rodriguez, M.; andez, Romero-Hern\; Published by: Space Weather Published on: 12/2018 YEAR: 2018 DOI: 10.1029/2018SW001995 |
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Shpynev, B.G.; Zolotukhina, N.A.; Polekh, N.M.; Ratovsky, K.G.; Chernigovskaya, M.A.; Belinskaya, A.Yu.; Stepanov, A.E.; Bychkov, V.V.; Grigorieva, S.A.; Panchenko, V.A.; Korenkova, N.A.; Mielich, J.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 11/2018 YEAR: 2018 DOI: 10.1016/j.jastp.2017.10.014 |
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The pattern of the ionospheric storm that was observed during the severe two-step geomagnetic storm on 19\textendash22 December 2015 in ... Kurkin, V.I.; Polekh, N.M.; Zolotukhina, N.A.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 11/2018 YEAR: 2018 DOI: 10.1016/j.jastp.2018.07.003 |
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Kosar, Burcu; MacDonald, Elizabeth; Case, Nathan; Zhang, Yongliang; Mitchell, Elizabeth; Viereck, Rodney; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 10/2018 YEAR: 2018 DOI: 10.1016/j.jastp.2018.05.006 |
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Ionospheric response to solar EUV variations: Preliminary results We investigate the ionospheric response to solar Extreme Ultraviolet (EUV) variations using different proxies, based on solar EUV spectra observed from the Solar Extreme Ultraviolet Experiment (SEE) onboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite, the F10.7 index (solar irradiance at 10.7cm), and the Bremen composite Mg-II index during January 2003 to December 2016. The daily mean solar proxies are compared with global mean Total Electron Content (GTEC) values calculated from globa ... Vaishnav, Rajesh; Jacobi, Christoph; Berdermann, Jens; Schmölter, Erik; Codrescu, Mihail; Published by: Advances in Radio Science Published on: 09/2018 YEAR: 2018 DOI: 10.5194/ars-16-157-2018 |
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This paper investigates and quantifies the longitudinal, solar cyclical, and diurnal variation of the ionosphere peak electron density observed by six ionosondes located between 18 and 151\textdegreeE near 60\textdegreeN. Embedded within this region is the Bering Sea anomaly (BSA) where the midnight peak electron density exceeds the midday peak electron density in summer. The BSA is a region West of Alaska extending from approximately 100\textdegree to 200\textdegree east geographic longitude and 55\textdegree to 70\textd ... Richards, P.; Meier, R.; Chen, Shihping; Dandenault, P.; Published by: Journal of Geophysical Research: Space Physics Published on: 08/2018 YEAR: 2018 DOI: 10.1029/2018JA025413 |
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A comprehensive analysis using nearly two decades of ionosonde data is carried out on the seasonal and solar cycle variations of Equatorial Spread F (ESF) irregularities over magnetic equatorial location Trivandrum (8.5\textdegreeN, 77\textdegreeE). The corresponding Rayleigh Taylor (RT) instability growth rates (γ) are also estimated. A seasonal pattern of ESF occurrence and the corresponding γ is established for low solar (LSA), medium solar (MSA) and high solar (HSA) activity p ... Haridas, M.K.; Manju, G.; Arunamani, T.; Published by: Advances in Space Research Published on: 05/2018 YEAR: 2018 DOI: 10.1016/j.asr.2018.02.040 |
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Multivariable Comprehensive Analysis of Two Great Geomagnetic Storms of 2015 During the year 2015 two great geomagnetic storms (Dst\ \<\ -200\ nT) occurred on 17 March and 22 June. These two geomagnetic storms have similarities. They occurred during the same decreasing phase of the sunspot cycle 24. The interplanetary and magnetospheric environments were calm before the beginning of the storms. Both events were due to Coronal Mass Ejections and High-Speed Solar Wind. Variations of the solar wind velocity and the Bz component of the interplanetary magnetic field were also similar. ... Kashcheyev, A.; e, Migoya-Oru\; Amory-Mazaudier, C.; Fleury, R.; Nava, B.; Alazo-Cuartas, K.; Radicella, S.; Published by: Journal of Geophysical Research: Space Physics Published on: 04/2018 YEAR: 2018 DOI: 10.1029/2017JA024900 |
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Storm Time Variation of Radiative Cooling by Nitric Oxide as Observed by TIMED-SABER and GUVI The variation of O/N2 (reference to N2 column density 1017\ cm-2) and nitric oxide radiative emission flux exiting the thermosphere have been studied over the Northern Hemisphere during the superstorm event of 7\textendash12 November 2004. The data have been obtained from Global Ultraviolet Imager (GUVI) and Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) on board the National Aeronautics and Space Administration (NASA)\textquoterights Thermosphere, I ... Bharti, Gaurav; Sunil~Krishna, M.; Bag, T.; Jain, Puneet; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2018 YEAR: 2018 DOI: 10.1002/2017JA024576 |
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Published by: 42nd COSPAR Scientific Assembly Published on: |
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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 |
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Interhemispheric survey of polar cap aurora
Reidy, Jade; Fear, RC; Whiter, DK; Lanchester, B; Kavanagh, Andrew; Milan, SE; Carter, JA; Paxton, LJ; Zhang, Y; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Observational aspects of the IT energy budget at the multi-scales
Verkhoglyadova, OP; Meng, X; Mannucci, AJ; McGranaghan, R; Published by: Published on: |
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Planetary Magnetospheres 60 years after Explorer 1
Published by: Published on: |
| 2017 |
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Detection of ionospheric anomalies during intense space weather over a low-latitude GNSS station The operational availability of Global Navigation Satellite System is affected by large-scale irregularities of the ionosphere. The space weather events induce several intense irregularities and cause the non-linear distribution of ionospheric electron density. Monitoring of ionospheric responses due to extreme space weather events plays a key role in trans-ionospheric radio wave propagation. In the present analysis, a novel technique based on wavelet transform has been implemented for the analysis and detection of ionosp ... Sivavaraprasad, G.; Ratnam, Venkata; Padmaja, Sree; Sharvani, V.; Saiteja, G.; Mounika, Y.; Harsha, Babu; Published by: Acta Geodaetica et Geophysica Published on: 12/2017 YEAR: 2017 DOI: 10.1007/s40328-016-0190-4 |
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Polekh, N.; Zolotukhina, N.; Kurkin, V.; Zherebtsov, G.; Shi, J.; Wang, G.; Wang, Z.; Published by: Advances in Space Research Published on: 12/2017 YEAR: 2017 DOI: 10.1016/j.asr.2017.09.030 |
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This research reports the 250\ MHz amplitude ionosphere scintillations recorded at Vaddeswaram (Geographic Latitude 16.31\textdegreeN, Geographic Longitude 80.30\textdegreeE, Dip 18\textdegreeN), a low-latitude station in India. Though amplitude scintillations were recorded for four continuous days (05\textendash08 November 2011), the presence of intense and long-duration scintillations on 06 November 2011 instigated us to verify the ionosphere background conditions. This research, therefore, is also used important d ... Brahmanandam, P.S.; Uma, G.; Pant, T.K.; Published by: Advances in Space Research Published on: 10/2017 YEAR: 2017 DOI: 10.1016/j.asr.2017.06.051 |
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This paper investigates and quantifies the causes of the Weddell Sea Anomaly (WSA), a region near the tip of South America extending from approximately 30\textdegree to 120\textdegreeW geographic longitude and 50\textdegree to 75\textdegreeS geographic latitude at solar minimum between 2007 and 2010. This region is unusual because the midnight peak electron density exceeds the midday peak electron density in summer. This study is far more quantitative than previous studies because, unlike other models, it assimilates sele ... Richards, P.; Meier, R.; Chen, Shih-Ping; Drob, D.; Dandenault, P.; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2017 YEAR: 2017 DOI: 10.1002/2016JA023565 |
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Upadhayaya, Arun; Gupta, Sumedha; Kotnala, Ravinder; Published by: Published on: |
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Reidy, JA; Fear, RC; Whiter, DK; Lanchester, BS; Kavanagh, AJ; Paxton, LJ; Zhang, Y; Lester, Mark; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Dynamics of ionospheric disturbances during the 17—19 March 2015 geomagnetic storm over East Asia Based on vertical sounding data from nine ionosondes located at 19–66N, 100–130E we investigated the latitude-temporal dynamics of ionospheric disturbances during the 17–19 Polekh, N; Zolotukhina, N; , Kurkin; Zherebtsov, G; Shi, J; Wang, G; Wang, Z; Published by: Advances in Space Research Published on: YEAR: 2017 DOI: 10.1016/j.asr.2017.09.030 |
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MONITOR ionospheric network: two case studies on scintillation and electron content variability The ESA MONITOR network is composed of high-frequency-sampling global navigation satellite systems (GNSS) receivers deployed mainly at low and high latitudes to study eniguel, Yannick; Cherniak, Iurii; Garcia-Rigo, Alberto; Hamel, Pierrick; andez-Pajares, Manuel; Kameni, Roland; Kashcheyev, Anton; Krankowski, Andrzej; Monnerat, Michel; Nava, Bruno; , others; Published by: Published on: YEAR: 2017 DOI: 10.5194/angeo-35-377-2017 |
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Data-Driven Inference and Investigation of Thermosphere Dynamics and Variations
Mehta, Piyush; Linares, Richard; Sutton, Eric; Published by: order Published on: |
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PCA and vTEC climatology at midnight over mid-latitude regions The effect of the thermospheric vertical neutral wind on vertical total electron content (vTEC) variations including longitudinal anomaly, remaining winter anomaly, mid-latitude summer Published by: Earth, Planets and Space Published on: YEAR: 2017 DOI: 10.1186/s40623-017-0757-5 |
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Storm-time variation of radiative cooling by Nitric Oxide as observed by TIMED-SABER and GUVI
Krishna, Sunil; Bharti, Gaurav; Bag, Tikemani; Published by: Published on: |
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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: |
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Gupta, Sumedha; Upadhayaya, Arun; Taori, Alok; Kotnala, Ravinder; Published by: Published on: |
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Shpynev, BG; Zolotukhina, NA; Polekh, NM; Chernigovskaya, MA; Ratovsky, KG; Belinskaya, Yu; Stepanov, AE; Bychkov, VV; Grigorieva, SA; Panchenko, VA; , others; Published by: Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa Published on: |
| 2016 |
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This work estimates global-mean Kzz using Sounding of the Atmosphere using Broadband Emission Radiometry/Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics monthly global-mean CO2 profiles and a one-dimensional transport model. It is then specified as a lower boundary into the Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIE-GCM). Results first show that global-mean CO2 in the mesosphere and lower thermosphere region has annual and semiannual oscillat ... Salinas, Cornelius; Chang, Loren; Liang, Mao-Chang; Yue, Jia; Russell, James; Mlynczak, Martin; Published by: Journal of Geophysical Research: Space Physics Published on: 11/2016 YEAR: 2016 DOI: 10.1002/2016JA023161 |