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Found 44 entries in the Bibliography.
Showing entries from 1 through 44
| 2022 |
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Geomagnetic storms on 7–8 September 2017 triggered severe ionospheric disturbances that had a serious effect on satellite navigation and radio communication. Multiple observations Li, Wang; Zhao, Dongsheng; He, Changyong; Hancock, Craig; Shen, Yi; Zhang, Kefei; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2022 DOI: 10.1029/2021JA029830 |
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Geomagnetic storms on 7–8 September 2017 triggered severe ionospheric disturbances that had a serious effect on satellite navigation and radio communication. Multiple observations derived from Global Navigation Satellite System receivers, Earth s Magnetic Field and Environment Explorers (SWARM) and the Thermosphere-Ionosphere -Electrodynamics General Circulation Model s simulations are utilized to investigate the spatial-temporal ionospheric behaviors under storm conditions. The results indicate that the electron density i ... Li, Wang; Zhao, Dongsheng; He, Changyong; Hancock, Craig; Shen, Yi; Zhang, Kefei; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2022 DOI: 10.1029/2021JA029830 hemispheric asymmetry; ionospheric disturbances; Magnetic storms; thermospheric composition changes; TIE-GCM |
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In this study, the impact of improving soft (0.1–1 keV) electron precipitation on the F-region neutral mass density has been evaluated using the Global Ionosphere Thermosphere Model (GITM). Two types of electron energy spectra having the same total energy flux and average energy but different spectral shapes have been used to specify the electron precipitation in GITM. One is the Maxwellian spectrum and the other is from an empirical model, Auroral Spectrum and High-Latitude Electric field variabilitY (ASHLEY), which provi ... Zhu, Qingyu; Deng, Yue; Sheng, Cheng; Anderson, Philip; Bukowski, Aaron; Published by: Geophysical Research Letters Published on: YEAR: 2022 DOI: 10.1029/2021GL097260 ASHLEY; GITM; neutral mass density; soft electron precipitation |
| 2021 |
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The Wind Imaging Interferometer (WINDII) Empirical Model, which provides the characteristics of the O(1D) 630.0 nm atomic oxygen dayglow emission from the upper atmosphere has been reviewed and updated. It now includes the Integrated Emission Rate, the peak Volume Emission Rate, the Altitude of that peak and the Full Width at Half Maximum as functions of the F10.7 cm Solar Radio Flux and the solar zenith angle (SZA). The model employs 98,617 WINDII observations obtained between the years 1992 and 1996, and the model and obse ... Shepherd, Gordon; Cho, Young-Min; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2021 DOI: 10.1029/2020JA028715 dayglow; empirical model; O(1D) Emission; solar radio flux; solar zenith angle; upper atmosphere |
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Progresses and Challenges to specifying the IT system during weak storms
Deng, Yue; Heelis, Roderick; Paxton, Larry; Lyons, Larry; Nishimura, Toshi; Zhang, Shunrong; Bristow, Bill; Maute, Astrid; Sheng, Cheng; Zhu, Qingyu; , others; Published by: Published on: |
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MLT science enabled by atmospheric lidars With the pioneering development and deployment of different types of narrowband sodium fluorescence lidars in Europe (1985) and North America (1990) along with subsequent potassium and iron lidars, temperature and wind profilers have been observed to investigate atmospheric dynamics in the mesosphere and lower thermosphere (MLT) in midlatitude, polar and equatorial regions. Their achieved resolution allows investigation ranging from small-scale gravity waves to long-term global change. This chapter highlights MLT science ena ... She, Chiao-Yao; Liu, Alan; Yuan, Tao; Yue, Jia; Li, Tao; Ban, Chao; Friedman, Jonathan; Published by: Published on: YEAR: 2021 DOI: 10.1002/9781119815631.ch20 Geomagnetic storms; atmospheric stabilities; atmospheric state; climatology; clustered instrumentation; gravity wave dynamics; MLT science; resonance fluorescence lidars; sporadic metal layers; thermospheric metal layers |
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The geomagnetic storm that occurred on 25 August 25 2018, that is, during the minimum of solar cycle 24, is currently the strongest ever probed by the first China Seismo-Electromagnetic Satellite (CSES-01). By integrating the in situ measurements provided by CSES-01 (orbiting at altitude of 507 km) and by Swarm A satellite (orbiting at ca., 460 km) with ground-based observations (ionosondes, magnetometers, and Global Navigation Satellite System receivers), we investigate the ionospheric response at lower- and mid-latitudes o ... Spogli, L.; Sabbagh, D.; Regi, M.; Cesaroni, C.; Perrone, L.; Alfonsi, L.; Di Mauro, D.; Lepidi, S.; Campuzano, S.; Marchetti, D.; De Santis, A.; Malagnini, A.; Scotto, C.; Cianchini, G.; Shen, Xu; Piscini, A.; Ippolito, A.; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2021 DOI: 10.1029/2020JA028368 Geomagnetic storms; Equatorial Electrojet; in situ plasma density; ionospheric elctroduamics; Ionospheric storms; low-latitude ionosphere |
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explanation, that the lower summer measurements were the result of atmospheric composition change, based on the change of [O/N2] observed during the Boston summer by the GUVI Shepherd, Gordon; Cho, Young-Min; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2021 DOI: 10.1029/2020JA028715 |
| 2020 |
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In this paper we provide a comprehensive comparison of in situ electron density (Ne) and temperature (Te) measured by Langmuir probe (LAP) on board the China Seismo‐ Yan, Rui; Zhima, Zeren; Xiong, Chao; Shen, Xuhui; Huang, Jianping; Guan, Yibing; Zhu, Xinghong; Liu, Chao; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2020 DOI: 10.1029/2019JA027747 |
| 2019 |
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We present the monthly, seasonal and annual variation in the ionospheric total electron content (TEC) and \% occurrence rate of Equatorial plasma bubble (EPBs) during the lowest to Shetti, DJ; Gurav, OB; Seemla, Gopi; Published by: Astrophysics and Space Science Published on: YEAR: 2019 DOI: 10.1007/s10509-019-3643-8 |
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Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars The Super Dual Auroral Radar Network (SuperDARN) is a network of high-frequency (HF) radars located in the high- and mid-latitude regions of both hemispheres that is operated under international cooperation. The network was originally designed for monitoring the dynamics of the ionosphere and upper atmosphere in the high-latitude regions. However, over the last approximately 15 years, SuperDARN has expanded into the mid-latitude regions. With radar coverage that now extends continuously from auroral to sub-auroral and mid- ... Nishitani, Nozomu; Ruohoniemi, John; Lester, Mark; Baker, Joseph; Koustov, Alexandre; Shepherd, Simon; Chisham, Gareth; Hori, Tomoaki; Thomas, Evan; Makarevich, Roman; , others; Published by: Progress in Earth and Planetary Science Published on: YEAR: 2019 DOI: 10.1186/s40645-019-0270-5 |
| 2018 |
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High-Latitude Observations of a Localized Wind Wall and Its Coupling to the Lower Thermosphere Reversals in the thermospheric zonal winds at altitudes of 140 to 250\ km from eastward to westward have been found at southern geographic latitudes between 60\textdegree and 70\textdegree. These are confined to a narrow region between 100\textdegree and 200\textdegree in longitude with zonal velocities regularly of -400\ m/s, sometimes reaching -600\ m/s, so sharply defined that the authors describe it as a \textquotedblleftwind wall.\textquotedblright The observations were made by the Wind Imaging Interfe ... Shepherd, Gordon; Shepherd, Marianna; Published by: Geophysical Research Letters Published on: 05/2018 YEAR: 2018 DOI: 10.1029/2018GL077722 |
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High-Latitude Observations of a Localized Wind Wall and Its Coupling to the Lower Thermosphere Reversals in the thermospheric zonal winds at altitudes of 140 to 250\ km from eastward to westward have been found at southern geographic latitudes between 60\textdegree and 70\textdegree. These are confined to a narrow region between 100\textdegree and 200\textdegree in longitude with zonal velocities regularly of -400\ m/s, sometimes reaching -600\ m/s, so sharply defined that the authors describe it as a \textquotedblleftwind wall.\textquotedblright The observations were made by the Wind Imaging Interfe ... Shepherd, Gordon; Shepherd, Marianna; Published by: Geophysical Research Letters Published on: 05/2018 YEAR: 2018 DOI: 10.1029/2018GL077722 |
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Longitudinal and seasonal variations of O (1D) nightglow emission maxima at southern midlatitudes Initial observations with the global ultraviolet imager (GUVI) in the NASA TIMED satellite and mass density observed with WINDII, GUVI, GOCE and simulated by NRLMSISE-00 Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: YEAR: 2018 DOI: 10.1016/j.jastp.2017.11.012 |
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Deng, Y; Chen, Z; , Wang; Sheng, Cheng; , Jin; Zhang, Yongliang; Paxton, Larry; Deng, Xiaohua; Huang, Chung-Ming; Published by: Published on: |
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Paul, A; Kascheyev, A; Rodriguez-Bouza, M; PATHAK, K; Ferreira, AA; Shetti, D; Yao, JN; Published by: Advances in Space Research Published on: |
| 2017 |
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In this paper, the critical frequency of F2 layer of the ionosphere (foF2) and the total electron content (TEC) recorded at mid- and low-latitude observation sites near 120\textdegreeE in the China zone were used to investigate the response to a severe geomagnetic storm on March 17, 2015 (the minimum Dst -223 nT at 23 UT). The results showed that the strong geomagnetic storm caused a massive effect on the ionosphere. The characteristics of foF2 and TEC did not show obvious perturbation during the mai ... Published by: Advances in Space Research Published on: 05/2017 YEAR: 2017 DOI: 10.1016/j.asr.2017.02.021 |
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Shepherd, Gordon; Cho, Young-Min; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 01/2017 YEAR: 2017 DOI: 10.1016/j.jastp.2017.07.016 |
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Published by: Advances in Space Research Published on: |
| 2016 |
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Shepherd, Gordon; Cho, Young-Min; Fomichev, Victor; Martynenko, Oleg; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: |
| 2015 |
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The August 2011 URSI World Day campaign: Initial results During a 10-day URSI World Day observational campaign beginning on August 1, 2011, an isolated, major geomagnetic storm occurred. On August 5,\ Kp\ reached values of 8-and\ Dst\ dropped to -113\ nT. The occurrence of this isolated storm in the middle of a 10-day URSI World Day campaign provides and unprecedented opportunity to observe the coupling of solar wind energy into the magnetosphere and to evaluate the varied effects that occur in the coupled magnetosphere\text ... Immel, Thomas; Liu, Guiping; England, Scott; Goncharenko, Larisa; Erickson, Philip; Lyashenko, Mykhaylo; Milla, Marco; Chau, Jorge; Frey, Harald; Mende, Stephen; Zhou, Qihou; Stromme, Anja; Paxton, Larry; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 11/2015 YEAR: 2015 DOI: 10.1016/j.jastp.2015.09.005 |
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In this paper, we report our findings on the correlation between the neutral temperature (around the mesopause) and thermospheric column density O/N2\ ratio, along with their response to geomagnetic storms above midlatitude of North America. A temperature/wind Doppler Na lidar, operating at Fort Collins, CO (41\textdegreeN, 105\textdegreeW), and later at Logan, UT (42\textdegreeN and 112\textdegreeW), observed significant temperature increases (temperature anomaly) above 95 km (as much as 55 K at 105 km al ... Yuan, T.; Zhang, Y.; Cai, X.; She, C.-Y.; Paxton, L.; Published by: Geophysical Research Letters Published on: 09/2015 YEAR: 2015 DOI: 10.1002/2015GL064860 |
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The climatological characteristics of UHF-band scintillations over the low-latitude region of China were investigated by analyzing the observations recorded at three stations of our Zhang, Hongbo; Liu, Yumei; Wu, Jian; Xu, T; Sheng, D; Published by: Published on: YEAR: 2015 DOI: 10.5194/angeo-33-93-2015 |
| 2014 |
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Height-integrated Pedersen conductivity in both E and F regions from COSMIC observations Altitudinal distribution of Joule heating is very important to the thermosphere and ionosphere, which is roughly proportional to the Pedersen conductance at high latitudes. Based on the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) satellites observations from 2008 to 2011, the height-integrated Pedersen conductivities in both E (100\textendash150\ km) and F (150\textendash600\ km) regions and their ratio γPγP (∑PE/∑< ... Sheng, Cheng; Deng, Yue; Yue, Xinan; Huang, Yanshi; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 08/2014 YEAR: 2014 DOI: 10.1016/j.jastp.2013.12.013 COSMIC; Interhemispheric asymmetry; Joule heating; Pedersen conductivity |
| 2012 |
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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 |
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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 |
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Optical observations of large-scale undulations in the 23rd cycle of solar activity A statistical analysis of observations of large-scale undulations during the 23rd cycle of solar activity was performed using optical data from two stations: Tixie (71.6\textdegreeN, 128.9\textdegreeE) and Zhigansk (66.8\textdegreeN, 123.4\textdegreeE). The total number of events recorded was 54 (43 events at Tixie and 11 at Zhigansk). The complete list of observed events is presented. The occurrence frequency of eveningside (17\textendash23 LT) undulations during the solar activity growth (1999) and decline (2003\textend ... Baishev, D.; Barkova, E.; Yumoto, K.; Published by: Geomagnetism and Aeronomy Published on: 04/2012 YEAR: 2012 DOI: 10.1134/S0016793212020028 |
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Optical System Design of a Spaceborne Broadband Far Ultraviolet Hyperspectral Imager According to the application requirements for remote sensing of upper atmosphere,a reflective optical system of spaceborne far ultraviolet hyperspectral imager is designed.Which is composed of a scan mirror,an off-axis parabolic telescope and a toroidal grating spectrometer.An aberration-correction method for concave toroidal grating is developed.The initial parameters are solved based on the geometrical aberration theory of concave grating and then optimized using the optical design software Zemax,and the toroidal gating ... Published by: Acta Optica Sinica Published on: optical design hyperspectral imager toroidal grating far ultraviolet geometrical aberration |
| 2011 |
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Sheehan, Catherine; Amidon, Gregory; Published by: American Pharmaceutical Review Published on: |
| 2010 |
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Electric fields and large-scale undulations in the evening sector of the diffuse auroral zone
Baishev, D.; Barkova, E.; Stepanov, A.; Rich, F.; Yumoto, K.; Published by: Geomagnetism and Aeronomy Published on: Jan-02-2010 YEAR: 2010 DOI: 10.1134/S0016793210010056 |
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Gattinger, R.; McDade, I.; an, A.; Boone, C.; Walker, K.; Bernath, P.; Evans, W.; Degenstein, D.; Yee, J.-H.; Sheese, P.; Llewellyn, E.; Published by: Journal of Geophysical Research Published on: Jan-01-2010 YEAR: 2010 DOI: 10.1029/2009JD013205 |
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Gattinger, RL; McDade, IC; an, AL; Boone, CD; Walker, KA; Bernath, PF; Evans, WFJ; Degenstein, DA; Yee, J-H; Sheese, P; , others; Published by: Journal of Geophysical Research: Atmospheres Published on: |
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Optical Observations of the Eveningside Undulations during Solar Cycle 23
Baishev, DG; Barkova, ES; Fedorov, AA; Yumoto, K; Published by: Proc. 8th International Confer ence “Problems of Geocosmos Published on: |
| 2009 |
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Design of FUV imaging spectrometer based on crossed Czerny-Turner structure This article describes the characteristics of the far ultraviolet (FUV) radiation and its applications in the space weather s research and prediction. The FUV imaging spectrometer is irreplaceable to get the FUV radiation data of the earth s upper atmosphere. Some key technologies of FUV spectrometer are analyzed respectively, including window materials, FUV light source, FUV detectors and FUV coating, which offer theoretical foundation for FUV imaging spectrometer. The paper presents a FUV band imaging spectrometer s optica ... Wu, Yan; Tang, Yi; Ni, Guoqiang; Sheng, Yunlong; Wang, Yongtian; Zeng, Lijiang; Published by: Published on: YEAR: 2009 DOI: 10.1117/12.806967 space weather; far ultraviolet; Imaging spectrometer; crossed Czerny-Turner system; optical design |
| 2007 |
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VITMO: The Virtual Observatory for the ITM Community
Morrison, D; Weiss, M; Daley, R; Immer, L; Colclough, C; Holder, R; Jen, J; Patrone, D; Hashemian, M; Meckel, P; , others; Published by: Published on: |
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Enabling Science with the Virtual ITM Observatory
Morrison, D; Weiss, M; Immer, L; Holder, R; Barnes, R; Colclough, C; Potter, M; Daley, R; Hashemian, M; Nylund, S; , others; Published by: Published on: |
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Data Search in the Virtual ITM Observatory
Morrison, D; Weiss, M; Daley, R; Immer, L; Colclough, C; Holder, R; Jen, J; Hashemian, M; Meckel, P; Potter, M; , others; Published by: Published on: |
| 2005 |
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Basu, Su.; Basu, S.; Makela, J.; Sheehan, R.; MacKenzie, E.; Doherty, P.; Wright, J.; Keskinen, M.; Pallamgaju, D.; Paxton, L.; Berkely, F.; Published by: Geophysical Research Letters Published on: Jan-01-2005 YEAR: 2005 DOI: 10.1029/2004GL021669 |
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Extended kalman filter for autonomous satellite navigation system
Devereux, William; Chacos, Albert; Asher, Mark; Duven, Dennis; Kusterer, Thomas; Morgan, Richard; Published by: Published on: 2 |
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Basu, Su; Basu, Su; Makela, JJ; Sheehan, RE; MacKenzie, E; Doherty, P; Wright, JW; Keskinen, MJ; Pallamraju, D; Paxton, LJ; , others; Published by: Geophysical Research Letters Published on: |
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A Virtual Metadata Generator for the TIMED Program
Morrison, D; Weiss, M; Daley, R; Immer, E; Hashemian, M; Nylund, S; Skura, J; Published by: Published on: |
| 2004 |
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Two Components of Ionospheric Plasma Structuring at Mid-Latitudes during Large Magnetic Storms
Basu, S; Makela, J; Sheehan, R; MacKenzie, E; Keskinen, M; Pallamraju, D; Paxton, L; Published by: Published on: |
| 2003 |
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Autonomous satellite navigation system
Devereux, William; Heins, Robert; Chacos, Albert; Linstrom, Lloyd; Asher, Mark; Duven, Dennis; Gruenbacher, Don; Kusterer, Thomas; Strohbehn, Kim; Morgan, Richard; , others; Published by: Published on: aug |
| 2002 |
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Products Derived From GUVI Dayglow and Auroral Data
Strickland, DJ; Christensen, A; Meier, R; Paxton, L; Morrison, D; Craven, J; Crowley, G; Waltersheid, R; Avery, S; Meng, C; Published by: Published on: |
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