GUVI Biblio





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Found 14 entries in the Bibliography.


Showing entries from 1 through 14


2018

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

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

2017

A severe negative response of the ionosphere to the intense geomagnetic storm on March 17, 2015 observed at mid- and low-latitude stations in the China zone

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 ...

Liu, Guoqi; Shen, Hua;

Published by: Advances in Space Research      Published on: 05/2017

YEAR: 2017     DOI: 10.1016/j.asr.2017.02.021

Stationary depletions in thermospheric atomic oxygen concentration and mass density observed with WINDII, GUVI, GOCE and simulated by NRLMSISE-00

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

2015

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

Aeronomy; Ionosphere; Radar; thermosphere

Impacts of CME-induced geomagnetic storms on the midlatitude mesosphere and lower thermosphere observed by a sodium lidar and TIMED/GUVI

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

2014

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

The Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite: A 20 year perspective

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

The Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite: A 20 year perspective

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

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

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 ...

Qingsheng, Xue;

Published by: Acta Optica Sinica      Published on:

YEAR: 2012     DOI:

optical design hyperspectral imager toroidal grating far ultraviolet geometrical aberration

2010

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

NO 2 air afterglow and O and NO densities from Odin-OSIRIS night and ACE-FTS sunset observations in the Antarctic MLT region

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

2005

Two components of ionospheric plasma structuring at midlatitudes observed during the large magnetic storm of October 30, 2003

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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