GUVI Biblio





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Found 135 entries in the Bibliography.


Showing entries from 1 through 50


2019

Space Weather Modeling Capabilities Assessment: Auroral Precipitation and High-Latitude Ionospheric Electrodynamics

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

2016

RENU 2 UV Measurements of Atomic Oxygen in the Cusp Region

Fritz, Bruce; Lessard, Marc; Paxton, Larry; Cook, Timothy; Lynch, Kristina; Clemmons, James; Hecht, James; Hysell, David; Crowley, Geoff;

Published by:       Published on:

YEAR: 2016     DOI:

Analysis of TIMED/GUVI Dayglow Utraviolet Oxygen Images

Christensen, Andrew; Crowley, Geoff; Meier, Robert;

Published by:       Published on:

YEAR: 2016     DOI:

2015

Global ionospheric response to the 2009 sudden stratospheric warming event using Ionospheric Data Assimilation Four-Dimensional (IDA4D) algorithm

A data assimilation algorithm is used to delineate the time-dependent three-dimensional ionospheric response to the 2009 sudden stratospheric warming (SSW) event. We use the Ionospheric Data Assimilation Four-Dimensional (IDA4D) algorithm to study the global ionospheric response to the 2009 SSW. This is the first study to utilize global ionospheric measurements in a data assimilation framework to unambiguously characterize atmosphere-ionosphere coupling via tidal modifications during the 2009 SSW event. Model results reve ...

Azeem, I.; Crowley, G.; Honniball, C.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 05/2015

YEAR: 2015     DOI: 10.1002/2015JA020993

Atmospheric tides; data assimilation; ionosphere/atmosphere interactions; sudden stratospheric warming

Seasonal variability in global eddy diffusion and the effect on neutral density

We describe a method for making single-satellite estimates of the seasonal variability in global-average eddy diffusion coefficients. Eddy diffusion values as a function of time were estimated from residuals of neutral density measurements made by the Challenging Minisatellite Payload (CHAMP) and simulations made using the thermosphere-ionosphere-mesosphere electrodynamics global circulation model (TIME-GCM). The eddy diffusion coefficient results are quantitatively consistent with previous estimates based on satellite dr ...

Pilinski, M.; Crowley, G.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 04/2015

YEAR: 2015     DOI: 10.1002/2015JA021084

annual; eddy diffusion; neutral density; satellite drag; seasonal variability; semiannual

A new technique for remote sensing of O 2 density from 140 to 180 km

Observations of molecular oxygen are difficult to make in the Earth\textquoterights atmosphere between 140 and 200 km altitude. Perhaps the most accurate measurements to date have been obtained from satellite instruments that measure solar occultations of the limb. These do provide height-resolved O2 density measurements, but the nature of this technique is such that the temporal/spatial distribution of the measurements is uneven. Here a new space-based technique is described that utilizes two bright dayglow em ...

Hecht, James; Christensen, Andrew; Yee, Jeng-Hwa; Crowley, Geoff; Bishop, Rebeeca; Budzien, Scott; Stephan, Andrew; Evans, Scott;

Published by: Geophysical Research Letters      Published on: 01/2015

YEAR: 2015     DOI: 10.1002/2014GL062355

composition; technique; thermosphere

Remote Sensing of Earth\textquoterights Limb by TIMED/GUVI: Retrieval of thermospheric composition and temperature

The Global Ultraviolet Imager (GUVI) onboard the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite senses far ultraviolet emissions from O and N2 in the thermosphere. Transformation of far ultraviolet radiances measured on the Earth limb into O, N2, and O2 number densities and temperature quantifies these responses and demonstrates the value of simultaneous altitude and geographic information. Composition and temperature variations are available from 2002 to 2007 ...

Meier, R.; Picone, J.; Drob, D.; Bishop, J.; Emmert, J.; Lean, J.; Stephan, A.; Strickland, D.; Christensen, A.; Paxton, L.; Morrison, D.; Kil, H.; Wolven, B.; Woods, Thomas; Crowley, G.; Gibson, S.;

Published by: Earth and Space Science      Published on: 01/2015

YEAR: 2015     DOI: 10.1002/2014EA000035

airglow and aurora; remote sensing; thermosphere: composition and chemistry; thermosphere: energy deposition

Characteristics of extreme geoelectric fields and their possible causes: Localized peak enhancements

Ngwira, Chigomezyo; Pulkkinen, Antti; Bernabeu, Emanuel; Eichner, Jan; Viljanen, Ari; Crowley, Geoff;

Published by: Geophysical Research Letters      Published on:

YEAR: 2015     DOI:

First light from a kilometer-baseline Scintillation Auroral GPS Array

Datta-Barua, S; Su, Y; Deshpande, K; Miladinovich, D; Bust, GS; Hampton, D; Crowley, G;

Published by: Geophysical Research Letters      Published on:

YEAR: 2015     DOI:

A new technique for remote sensing of O2 density from 140 to 180 km

Hecht, James; Christensen, Andrew; Yee, Jeng-Hwa; Crowley, Geoff; Bishop, Rebeeca; Budzien, Scott; Stephan, Andrew; Evans, Scott;

Published by: Geophysical Research Letters      Published on:

YEAR: 2015     DOI:

Community-wide model validation study for systematic assessment of ionosphere models

Shim, Ja; Kuznetsova, Maria; Rastaetter, Lutz; Bilitza, Dieter; Bingham, Suzy; Bust, Gary; Calfas, Roy; Codrescu, Mihail; Coster, Anthea; Crowley, Geoff; , others;

Published by:       Published on:

YEAR: 2015     DOI:

Multisensor profiling of a concentric gravity wave event propagating from the troposphere to the ionosphere

Azeem, Irfan; Yue, Jia; Hoffmann, Lars; Miller, Steven; Straka, William; Crowley, Geoff;

Published by: Geophysical research letters      Published on:

YEAR: 2015     DOI:

First Measurements of Ionospheric TEC and GPS Scintillations from an Unmanned Marine Vehicle

Azeem, Irfan; Crowley, Geoff; Reynolds, Adam;

Published by:       Published on:

YEAR: 2015     DOI:

Thermal cell structures in the high-latitude thermosphere induced by ion drag

Walterscheid, RL; Crowley, G;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2015     DOI:

2014

Interplanetary magnetic field By control of prompt total electron content increases during superstorms

Large magnitude increases in ionospheric total electron content (TEC) that occur over 1\textendash3\ h on the dayside are a significant manifestation of the main phases of superstorms. For the largest superstorms of solar cycle 23 (based on the Dst index), ground networks of GPS receivers measured peak total electron content increases greater than a factor of 2 relative to quiet time TEC averaged over the broad latitude band \textpm40\textdegree for local times 1200\textendash1600\ LT. Near 30\textdegre ...

Mannucci, A.J.; Crowley, G.; Tsurutani, B.T.; Verkhoglyadova, O.P.; Komjathy, A.; Stephens, P.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 08/2014

YEAR: 2014     DOI: 10.1016/j.jastp.2014.01.001

Geomagnetic storms; Ionosphere

Seasonal Variability in Global Eddy Diffusion and the Effect on Thermospheric Neutral Density

Pilinski, Marcin; Crowley, Geoff;

Published by:       Published on:

YEAR: 2014     DOI:

Ensemble Assimilation Using Three First-Principles Thermospheric Models as a Tool for 72-hour Density and Satellite Drag Forecasts

Hunton, Don; Pilinski, Marcin; Crowley, Geoff; Azeem, I; Fuller-Rowell, Timothy; Matsuo, Tomoko; Fedrizzi, Mariangel; Solomon, Stanley; Qian, Liying; Thayer, Jeffrey; , others;

Published by:       Published on:

YEAR: 2014     DOI:

Topside Ionospheric Sounder for CubeSats

Swenson, C; Pratt, J; Fish, CS; Winkler, C; Pilinski, M; Azeem, I; Crowley, G; Jeppesen, M; Martineau, R;

Published by:       Published on:

YEAR: 2014     DOI:

Space Weather Tools of the Trade-A Changing Mix

Kunches, Joseph; Crowley, Geoff; Pilinski, Marcin; Winkler, Clive; Fish, Chad; Hunton, Don; Reynolds, Adam; Azeem, I;

Published by:       Published on:

YEAR: 2014     DOI:

2013

First storm-time plasma velocity estimates from high-resolution ionospheric data assimilation

Datta-Barua, Seebany; Bust, Gary; Crowley, Geoff;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2013     DOI:

Conjugate High Latitude Measurements along the 40 degree magnetic meridian: Autonomous Adaptive Low-Power Instrument Platforms on the East Antarctic Plateau

Clauer, Robert; Kim, Hyomin; Deshpande, Kshitija; Xu, Zhonghua; Fish, Chad; Musko, Steve; Crowley, Geoff; Humphreys, Todd; Bhatti, Jahshan; Bust, Grary;

Published by:       Published on:

YEAR: 2013     DOI:

2012

Characteristics of traveling ionospheric disturbances observed by the TIDDBIT sounder

Crowley, Geoff; Rodrigues, FS;

Published by: Radio Science      Published on:

YEAR: 2012     DOI:

Parameterization of the ion convection and the auroral oval in the NCAR thermospheric general circulation models

Emery, B; Roble, Raymond; Ridley, Cicely; Richmond, Arthur; Knipp, Delores; Crowley, Geoff; Evans, David; Rich, Frederick; Maeda, Sawako;

Published by: NCAR Tech. Note NCAR/TN-491+ STR      Published on:

YEAR: 2012     DOI:

Tutorial: The Neutral Atmosphere and the Satellite Drag Environment

Crowley, Geoff; Pilinski, Marcin; Azeem, Irfan;

Published by: Advances in the Astronautical Sciences      Published on:

YEAR: 2012     DOI:

2011

Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21\textendash22 January 2005

Sahai, Y.; Fagundes, P.; de Jesus, R.; de Abreu, A.; Crowley, G.; Kikuchi, T.; Huang, C.-S.; Pillat, V.; Guarnieri, F.; Abalde, J.; Bittencourt, J.;

Published by: Annales Geophysicae      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.5194/angeo-29-919-2011

A study of space shuttle plumes in the lower thermosphere

Meier, R.; Stevens, Michael; Plane, John; Emmert, J.; Crowley, G.; Azeem, I.; Paxton, L.; Christensen, A.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.1029/2011JA016987

Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21—22 January 2005

Sahai, Y; Fagundes, PR; De Jesus, R; De Abreu, AJ; Crowley, G; Kikuchi, T; Huang, C-S; Pillat, VG; Guarnieri, FL; , Abalde; , others;

Published by:       Published on:

YEAR: 2011     DOI:

Effects of geomagnetic super storms on the ionospheric F-region in the South American sector using a GPS technique: A review

Sahai, Y; De Abreu, AJ; Fagundes, PR; De Jesus, R; Crowley, G; Klimenko, MV; Klimenko, VV; Brunini, C; Gende, M; Pillat, VG; , others;

Published by: Asian Journal of Physics      Published on:

YEAR: 2011     DOI:

The Storm Time Energy and Dynamics Explorers

Swenson, C; Fish, CS; Crowley, G; Earle, GD; Anderson, BJ; Dyrud, LP; Carlson, HC; Erickson, PJ; Fejer, BG; Mertens, CJ; , others;

Published by:       Published on:

YEAR: 2011     DOI:

Remote Sensing of lower thermospheric temperature and composition based on observations of O2 Atmospheric band emission.

Christensen, AB; Yee, J; Budzien, SA; Bishop, RL; Hecht, JH; Stephan, AW; Crowley, G;

Published by:       Published on:

YEAR: 2011     DOI:

Ion Temperature Distribution in the High-Latitude Region (EISCAT UHF Radar Observations). What is the Field-aligned Currents Influence?

Teodosiev, Dimitar; Yordanova, Emiliya; Nenovski, Petko; Nikolova, Tatyana; Danov, Dimitar; Crowley, Geoff; Baddeley, Lissa; Buchert, Stefan;

Published by: Comptes rendus de l’Acad\ emie bulgare des Sciences      Published on:

YEAR: 2011     DOI:

2010

Can molecular diffusion explain Space Shuttle plume spreading?

Meier, R.; Plane, John; Stevens, Michael; Paxton, L.; Christensen, A.; Crowley, G.;

Published by: Geophysical Research Letters      Published on: Jan-04-2010

YEAR: 2010     DOI: 10.1029/2010GL042868

Comparison of the Hill\textendashSiscoe polar cap potential theory with the Weimer and AMIE models

Kelley, Michael; Crowley, Geoffrey; Weimer, Daniel;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: Jan-03-2010

YEAR: 2010     DOI: 10.1016/j.jastp.2009.02.011

Effects of the Shuttle Plumes on the Chemistry and Energetics of the Lower Thermosphere

Azeem, SI; Crowley, G; Stevens, MH; Meier, RR;

Published by:       Published on:

YEAR: 2010     DOI:

Dynamical Properties of Shuttle Plumes in the Lower Thermosphere

Meier, RR; Stevens, MH; Plane, JM; Emmert, JT; Crowley, G; Paxton, LJ; Christensen, AB; Azeem, SI;

Published by:       Published on:

YEAR: 2010     DOI:

Periodic spacing between consecutive equatorial plasma bubbles

Makela, Jonathan; Vadas, SL; Muryanto, R; Duly, T; Crowley, G;

Published by: Geophysical Research Letters      Published on:

YEAR: 2010     DOI:

On the causes of plasmaspheric rotation variability: IMAGE EUV observations

Galvan, David; Moldwin, Mark; Sandel, Bill; Crowley, Geoff;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2010     DOI:

A comprehensive rocket and radar study of midlatitude spread F

Earle, GD; Bhaneja, P; Roddy, PA; Swenson, CM; Barjatya, Aroh; Bishop, RL; Bullett, TW; Crowley, G; Redmon, R; Groves, K; , others;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2010     DOI:

Seasonal variations in ionospheric F-region parameters during the low solar activity period in the Brazilian sector and comparison with ionospheric models

Sahai, Yogeshwar; de Jesus, Rodolfo; Fagundes, Paulo; de Abreu, Alessandro; Crowley, Geoff; Pillat, Valdir; Guede, Jose; Bittencourt, Jose;

Published by: 38th COSPAR Scientific Assembly      Published on:

YEAR: 2010     DOI:

Evolved Tiny Ionospheric Photometer (ETIP): A sensor for ionospheric specification

Budzien, Scott; Chua, Damien; Coker, Clayton; Dandenault, Patrick; Dymond, Kenneth; Nicholas, Andrew; Doe, Richard; Crowley, Geoff;

Published by: To address the requirements for space weather sensors, and includes adequate flexibility for accommodation on a range of future flight opportunities, including microsatellite constellations      Published on:

YEAR: 2010     DOI:

2009

On the origin of pre-reversal enhancement of the zonal equatorial electric field

Kelley, MC; Ilma, RR; Crowley, G;

Published by:       Published on:

YEAR: 2009     DOI:

Large-scale instabilities of the lower thermosphere during an active period

Walterscheid, RL; Crowley, G;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2009     DOI:

Physics-Based Modeling of Space Weather in the Ionosphere and Thermosphere

Crowley, Geoff;

Published by:       Published on:

YEAR: 2009     DOI:

Response of the Ionospheric F-region in the Latin American Sector During the Intense Geomagnetic Storm of 21-22 January 2005

Sahai, Y; Fagundes, PR; De Jesus, R; De Abreu, AJ; Crowley, G; Pillat, VG; Guarnieri, FL; , Abalde; Bittencourt, JA;

Published by:       Published on:

YEAR: 2009     DOI:

Global Ultra-Violet Ionosphere-Thermosphere Observatory (GUVITO)

Curtis, N; Crowley, G; Christensen, AB; Paxton, LJ; Robichaud, J; Barry, MA; Bust, GS;

Published by:       Published on:

YEAR: 2009     DOI:

2008

Periodic modulations in thermospheric composition by solar wind high speed streams

Crowley, G.; Reynolds, A.; Thayer, J.; Lei, J.; Paxton, L.; Christensen, A.; Zhang, Y.; Meier, R.; Strickland, D.;

Published by: Geophysical Research Letters      Published on: Jan-01-2008

YEAR: 2008     DOI: 10.1029/2008GL035745

Disturbed O/N 2 ratios and their transport to middle and low latitudes

Crowley, Geoff; Meier, RR;

Published by: Washington DC American Geophysical Union Geophysical Monograph Series      Published on:

YEAR: 2008     DOI:

Mapping the time-varying distribution of high-altitude plasma during storms

Bust, GS; Crowley, Geoff;

Published by: Washington DC American Geophysical Union Geophysical Monograph Series      Published on:

YEAR: 2008     DOI:

Neutral composition and density effects in the October—November 2003 Magnetic Storms

Immel, TJ; Crowley, Geoff; Forbes, JM; Nerem, RS; Sutton, EK;

Published by: Midlatitude Ionospheric Dynamics and Disturbances      Published on:

YEAR: 2008     DOI:

Disturbed time observations of the temporal dependence and dynamics of TEC, scintillation, and ionospheric irregularity zonal drifts

Muella, Marcio; de Paula, Eurico; Kintner, Paul; Kantor, Ivan; Cerruti, Alessandro; Mitchell, Cathryn; Crowley, Geoff; Smorigo, Paulo; Batista, Inez;

Published by: 37th COSPAR Scientific Assembly      Published on:

YEAR: 2008     DOI:



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