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Found 531 entries in the Bibliography.
Showing entries from 151 through 200
| 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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Zhang, Yongliang; Paxton, Larry; Jones, James; Published by: Space Weather Published on: |
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SSUSI and SSUSI-Lite: Providing space situational awareness and support for over 25 years
Paxton, Larry; Schaefer, Robert; Zhang, Yongliang; Kil, Hyosub; Hicks, John; Published by: Johns Hopkins APL Technical Digest Published on: |
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Observations and Modeling of Atomic/Molecular Composition in the Thermosphere
Solomon, Stanley; Eastes, Richard; McClintock, William; Paxton, Larry; Zhang, Yongliang; Published by: Published on: |
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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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Thermospheric Neutral Composition Response to External Forcings
Fedrizzi, Mariangel; Karol, Svetlana; Yudin, Valery; Fuller-Rowell, Timothy; Codrescu, Mihail; Olsen, Jack; Paxton, Larry; Zhang, Yongliang; Published by: 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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Chang, Yu-Shan; Chen, Chia-Hung; Lin, Charles; Chu, Hung-Hsuan; Matsuo, Tomoko; Published by: Published on: |
| 2017 |
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Daytime Ionosphere Retrieval Algorithm for the Ionospheric Connection Explorer (ICON) The NASA Ionospheric Connection Explorer Extreme Ultraviolet spectrograph, ICON EUV, will measure altitude profiles of the daytime extreme-ultraviolet (EUV) OII emission near 83.4 and 61.7\ nm that are used to determine density profiles and state parameters of the ionosphere. This paper describes the algorithm concept and approach to inverting these measured OII emission profiles to derive the associated O+ density profile from 150\textendash450\ km as a proxy for the electron content in the F-region of the iono ... Stephan, Andrew; Korpela, Eric; Sirk, Martin; England, Scott; Immel, Thomas; Published by: Space Science Reviews Published on: 10/2017 YEAR: 2017 DOI: 10.1007/s11214-017-0385-1 |
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The Storm Time Evolution of the Ionospheric Disturbance Plasma Drifts In this paper, we use the C/NOFS and ROCSAT-1 satellites observations to analyze the storm time evolution of the disturbance plasma drifts in a 24\ h local time scale during three magnetic storms driven by long-lasting southward IMF Bz. The disturbance plasma drifts during the three storms present some common features in the periods dominated by the disturbance dynamo. The newly formed disturbance plasma drifts are upward and westward at night, and downward and eastward during daytime. Fu ... Zhang, Ruilong; Liu, Libo; Le, Huijun; Chen, Yiding; Kuai, Jiawei; Published by: Journal of Geophysical Research: Space Physics Published on: 10/2017 YEAR: 2017 DOI: 10.1002/2017JA024637 |
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The non--storm time corrugated upper thermosphere: What is beyond MSIS? Observations in the recent decade have revealed many thermospheric density corrugations/perturbations under nonstorm conditions (Kp \< 2). They are generally not captured by empirical models like Mass Spectrometer Incoherent Scatter (MSIS) but are operationally important for long-term orbital evolution of Low Earth Orbiting satellites and theoretically for coupling processes in the atmosphere-ionosphere system. We review these density corrugations by classifying them into three types which are driven ... Liu, Huixin; Thayer, Jeff; Zhang, Yongliang; Lee, Woo; Published by: Space Weather Published on: 06/2017 YEAR: 2017 DOI: 10.1002/swe.v15.610.1002/2017SW001618 |
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Geospace system responses to the St. Patrick's Day storms in 2013 and 2015 This special collection includes 31 research papers investigating geospace system responses to the geomagnetic storms during the St. Patrick\textquoterights Days of 17 March 2013 and 2015. It covers observation, data assimilation, and modeling aspects of the storm time phenomena and their associated physical processes. The ionosphere and thermosphere as well as their coupling to the magnetosphere are clearly the main subject areas addressed. This collection provides a comprehensive picture of the geospace response to thes ... Zhang, Shun-Rong; Zhang, Yongliang; Wang, Wenbin; Verkhoglyadova, Olga; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2017 YEAR: 2017 DOI: 10.1002/2017JA024232 |
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Geospace system responses to the St. Patrick's Day storms in 2013 and 2015 This special collection includes 31 research papers investigating geospace system responses to the geomagnetic storms during the St. Patrick\textquoterights Days of 17 March 2013 and 2015. It covers observation, data assimilation, and modeling aspects of the storm time phenomena and their associated physical processes. The ionosphere and thermosphere as well as their coupling to the magnetosphere are clearly the main subject areas addressed. This collection provides a comprehensive picture of the geospace response to thes ... Zhang, Shun-Rong; Zhang, Yongliang; Wang, Wenbin; Verkhoglyadova, Olga; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2017 YEAR: 2017 DOI: 10.1002/2017JA024232 |
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The quasi-6~day wave and its interactions with solar tides Thermosphere Ionosphere Mesosphere Energetics and Dynamics/Sounding of the Atmosphere using Broadband Emission Radiometry (TIMED/SABER) temperature measurements between 20 and 110\ km altitude and \textpm50\textdegree latitude during 2002\textendash2015 are employed to reveal the climatological characteristics of the quasi-6\ day wave (Q6DW) and evidence for secondary waves (SW) resulting from its nonlinear interactions with solar tides. The mean period is 6.14d with a standard deviation (σ) of 0.26d. ... Forbes, Jeffrey; Zhang, Xiaoli; Published by: Journal of Geophysical Research: Space Physics Published on: 03/2017 YEAR: 2017 DOI: 10.1002/2017JA023954 |
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Far ultraviolet instrument technology The far ultraviolet (FUV) spectral range (from about 115 nm to 180 nm) is one of the most useful spectral regions for characterizing the upper atmosphere (thermosphere and ionosphere). The principal advantages are that there are FUV signatures of the major constituents of the upper atmosphere as well as the signatures of the high-latitude energy inputs. Because of the absorption by thermospheric O2, the FUV signatures are seen against a \textquotedblleftblack\textquotedblright background, i.e., one that is not ... Paxton, Larry; Schaefer, Robert; Zhang, Yongliang; Kil, Hyosub; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2017 YEAR: 2017 DOI: 10.1002/jgra.v122.210.1002/2016JA023578 |
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A new auroral boundary determination algorithm based on observations from TIMED/GUVI and DMSP/SSUSI An automatic auroral boundary determination algorithm is proposed in this study based on the partial auroral oval images from the Global Ultraviolet Imager (GUVI) aboard the Thermosphere\textendashIonosphere-Mesosphere Energetics and Dynamics satellite and the Special Sensor Ultraviolet Spectrographic Imager (SSUSI) aboard the Defense Meteorological Satellite Program (DMSP F16). This algorithm based on the fuzzy local information C-means clustering segmentation can be used to extract the auroral oval poleward and equatorw ... Ding, Guang-Xing; He, Fei; Zhang, Xiao-Xin; Chen, Bo; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2017 YEAR: 2017 DOI: 10.1002/jgra.v122.210.1002/2016JA023295 |
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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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of TIMED/GUVI to derive the O/N2 [14], and the data of TIMED/GUVI which are recorded by as the data of Polar BEAR/AIRS and TIMED/GUVI. This method uses the intensity ratio of OI Zhang, Yongchao; Zhu, Jun; Yin, Huan; Zhang, Xiaoxin; Published by: Published on: |
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of TIMED/GUVI to derive the O/N2 [14], and the data of TIMED/GUVI which are recorded by as the data of Polar BEAR/AIRS and TIMED/GUVI. This method uses the intensity ratio of OI Zhang, Yongchao; Zhu, Jun; Yin, Huan; Zhang, Xiaoxin; Published by: Published on: |
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The quasi-6 day wave and its interactions with solar tides Q6DW in the lower thermosphere; the [O]/[N 2 ] variations were measured by Thermosphere Ionosphere Mesosphere Energetics and Dynamics/Global Ultraviolet Imager (TIMED/GUVI) Forbes, Jeffrey; Zhang, Xiaoli; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2017 DOI: 10.1002/2017JA023954 |
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QUASI-BIENNIAL VARIATIONS IN IONOSPHERIC TIDAL/SPW AMPLITUDES: OBSERVATIONS AND MODELING
Loren, Cheewei; Yan-Yi, Sun; Jack, Chieh; Shih-Han, Chien; Rung, Tsai-Lin; Jia, Yue; Published by: Published on: |
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A New More Accurate Calibration for TIMED/GUVI
Schaefer, RK; Aiello, J; Wolven, BC; Paxton, LJ; Romeo, G; Zhang, Y; Published by: Published on: |
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TIMED/GUVI Observations of Aurora, Ionosphere, Thermosphere and Solar EUV Variations
Zhang, Yongliang; Paxton, Larry; Schaefer, Robert; Published by: Published on: |
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The causes of thermospheric composition variations during and after major geomagnetic storms
Wang, Wenbin; Burns, Alan; Zhang, Yongliang; Liu, Jing; Published by: Published on: |
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Monitoring Geospace Variations Through Remote Sensing III Posters
Zhang, Yongliang; Paxton, Larry; Sibeck, David; Schaefer, Robert; Published by: Published on: |
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Oberheide, Jens; Krier, Christopher; Gan, Quan; Nischal, Nirmal; Zhang, Yongliang; Chang, Loren; Published by: Published on: |
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Oberheide, Jens; Krier, Christopher; Gan, Quan; Nischal, Nirmal; Zhang, Yongliang; Chang, Loren; Published by: Published on: |
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Burns, Alan; Wang, Wenbin; Zhang, Yongliang; Qian, Liying; Published by: Published on: |
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Zhang, Yongchao; Zhu, Jun; Yin, Huan; Zhang, Xiaoxin; Published by: Published on: |
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Zhang, Yongchao; Zhu, Jun; Yin, Huan; Zhang, Xiaoxin; Published by: Published on: |
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Zhang, Yongchao; Zhu, Jun; Yin, Huan; Zhang, Xiaoxin; Published by: Published on: YEAR: 2017 DOI: 10.1007/978-3-319-49184-410.1007/978-3-319-49184-4_29 |
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Zhang, Yongchao; Zhu, Jun; Yin, Huan; Zhang, Xiaoxin; Published by: Published on: YEAR: 2017 DOI: 10.1007/978-3-319-49184-410.1007/978-3-319-49184-4_29 |
| 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 |
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In this paper, an ionospheric electron density reanalysis algorithm was used to generate global optimized electron density during the 17\textendash18 March 2013 geomagnetic storm by assimilating ~10 low Earth orbit satellites based and ~450 ground global navigation satellite system receiver-based total electron content into a background ionospheric model. The reanalyzed electron density could identify the large-scale ionospheric features quite well during storm time, including the storm-enhanced density, the positive iono ... Yue, Xinan; Wang, Wenbin; Lei, Jiuhou; Burns, Alan; Zhang, Yongliang; Wan, Weixing; Liu, Libo; Hu, Lianhuan; Zhao, Biqiang; Schreiner, William; Published by: Journal of Geophysical Research: Space Physics Published on: 11/2016 YEAR: 2016 DOI: 10.1002/jgra.v121.910.1002/2016JA022984 |
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Polar cap arcs: Sun-aligned or cusp-aligned? Zhang, Y.; Paxton, L.J.; Zhang, Qinghe; Xing, Zanyang; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 08/2016 YEAR: 2016 DOI: 10.1016/j.jastp.2016.06.001 Polar cap arcs Cusp Reconnection Kelvin Helmholtz Instability Velocity shear Field aligned current |
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Polar cap arcs: Sun-aligned or cusp-aligned? Zhang, Y.; Paxton, L.J.; Zhang, Qinghe; Xing, Zanyang; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 08/2016 YEAR: 2016 DOI: 10.1016/j.jastp.2016.06.001 Polar cap arcs Cusp Reconnection Kelvin Helmholtz Instability Velocity shear Field aligned current |
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Coherent seasonal, annual, and quasi-biennial variations in ionospheric tidal/SPW amplitudes In this study, we examine the coherent spatial and temporal modes dominating the variation of selected ionospheric tidal and stationary planetary wave (SPW) signatures from 2007 to 2013 FORMOSAT-3/COSMIC (Constellation Observing System for Meteorology, Ionosphere, and Climate) total electron content observations using multidimensional ensemble empirical mode decomposition (MEEMD) from the Hilbert-Huang Transform. We examine the DW1, SW2, DE3, and SPW4 components, which are driven by a variety of in situ and vertical coupl ... Chang, Loren; Sun, Yan-Yi; Yue, Jia; Wang, Jack; Chien, Shih-Han; Published by: Journal of Geophysical Research: Space Physics Published on: 07/2016 YEAR: 2016 DOI: 10.1002/2015JA022249 |
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Disturbance dynamo is an important dynamic process during magnetic storms. However, very few direct observations of dynamo-induced plasma drifts and ion composition changes in the equatorial ionosphere are available. In this study, we use measurements of the Defense Meteorological Satellite Program (DMSP) satellites to identify the characteristics of the disturbance dynamo process in the topside equatorial ionosphere near dawn during the magnetic storm with a minimum Dst of -223 nT on 17 March 2015. Data from fou ... Huang, Chao-Song; Wilson, Gordon; Hairston, Marc; Zhang, Yongliang; Wang, Wenbin; Liu, Jing; Published by: Journal of Geophysical Research: Space Physics Published on: 06/2016 YEAR: 2016 DOI: 10.1002/2016JA023072 |
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Longitudinal variations of thermospheric composition at the solstices O/N2, measured by the Global Ultraviolet Imager on board the Thermosphere Ionosphere Mesosphere Energetics Dynamics satellite, has large longitudinal variations at the solstices, which are simulated well in upper atmosphere general circulation models. These longitudinal variations are caused by the displacement of the Earth\textquoterights magnetic poles from the geographic ones. The location of a magnetic pole affects the latitude at which the winds, driven by heating in summer, converge in the subauroral regi ... Qian, Liying; Burns, Alan; Wang, Wenbin; Solomon, Stanley; Zhang, Yongliang; Published by: Journal of Geophysical Research: Space Physics Published on: 06/2016 YEAR: 2016 DOI: 10.1002/2016JA022898 |
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Solar cycle variations of thermospheric composition at the solstices We examine the solar cycle variability of thermospheric composition (O/N2) at the solstices. Our observational and modeling studies show that the summer-to-winter latitudinal gradient of O/N2 is small at solar minimum but large at solar maximum; O/N2 is larger at solar maximum than at solar minimum on a global-mean basis; there is a seasonal asymmetry in the solar cycle variability of O/N2, with large solar cycle variations in the winter hemisphere and small solar cycle variatio ... Qian, Liying; Burns, Alan; Solomon, Stanley; Wang, Wenbin; Zhang, Yongliang; Published by: Journal of Geophysical Research: Space Physics Published on: 04/2016 YEAR: 2016 DOI: 10.1002/2016JA022390 |
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We investigate the interhemispheric circulation at the solstices, in order to understand why O/N2\ is larger in the northern hemisphere winter than in the southern hemisphere winter. Our studies reveal that the equatorial ionosphere anomaly (EIA) significantly impacts the summer-to-winter wind through plasma-neutral collisional heating, which changes the summer-to-winter pressure gradient, and ion drag. Consequently, the wind is suppressed in the summer hemisphere as it encounters the EIA but accelerates a ... Qian, Liying; Burns, Alan; Wang, Wenbin; Solomon, Stanley; Zhang, Yongliang; Hsu, V.; Published by: Journal of Geophysical Research: Space Physics Published on: 02/2016 YEAR: 2016 DOI: 10.1002/2015JA022169 Equatorial ionization anomaly; interhemispheric circulation; ionosphere winter anomaly; plasma-neutral collisional heating; thermosphere composition; vertical advection |
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With the development of modern technology, especially the development of information technology at high speed, the ultraviolet early warning system plays an increasingly important role. In the modern warfare, how to detect the threats earlier, prevent and reduce the attack of precision-guided missile has become a new challenge. Because the ultraviolet warning technology has high environmental adaptability, the low false alarm rate, small volume and other advantages, in the military field applications it has been developed ... Wang, Wen-cong; Jin, Dong-dong; Shao, Fei; Hu, Hui-jun; Shi, Yu-feng; Song, Juan; Zhang, Yu-tu; Yong, Liu; Published by: Published on: YEAR: 2016 DOI: 10.1117/12.2236440 |
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This work estimates global‐mean K zz using Sounding of the Atmosphere using Broadband Emission Radiometry/Thermosphere‐Ionosphere‐Mesosphere Energetics and Dynamics Salinas, Cornelius; Chang, Loren; Liang, Mao-Chang; Yue, Jia; , Russell; Mlynczak, Martin; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2016 DOI: 10.1002/2016JA023161 |
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With the development of modern technology, especially the development of information technology at high speed, the ultraviolet early warning system plays an increasingly important Wang, Wen-cong; Jin, Dong-dong; Shao, Fei; Hu, Hui-jun; Shi, Yu-feng; Song, Juan; Zhang, Yu-tu; Yong, Liu; Published by: Published on: YEAR: 2016 DOI: 10.1117/12.2236440 |
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Middle-latitude ionospheric irregularities and scintillation during geomagnetic storms
Pi, Xiaoqing; Mannucci, Anthony; Valant-Spaight, Bonnie; Viereck, Rodney; Zhang, Yongliang; Published by: Published on: |
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Far ultraviolet imaging of the aurora
Paxton, Larry; Zhang, Yongliang; Published by: Published on: |
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Zhang, Yongliang; Paxton, Larry; Fuller-Rowell, Timothy; Jones, James; Published by: Published on: |
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Schaefer, Robert; Paxton, Larry; Zhang, Yongliang; Published by: Published on: |
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Reidy, Jade; Fear, Robert; Lanchester, Betty; Whiter, Daniel; Kavanagh, Andrew; Paxton, Larry; Zhang, Yongliang; Published by: Published on: |
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Conjugate observations of the evolution of a long-duration polar cap arc in both hemispheres
Xing, Zan-Yang; Zhang, Qing-He; Zhang, Yongliang; Sato, Natsuo; Published by: Published on: |