SSUSI Publications

GPS phase scintillation at high latitudes during geomagnetic storms of 7\textendash17 March 2012 \textendash Part 2: Interhemispheric comparison

During the ascending phase of solar cycle 24, a series of interplanetary coronal mass ejections (ICMEs) in the period 7\textendash17 March 2012 caused geomagnetic storms that strongly affected high-latitude ionosphere in the Northern and Southern Hemisphere. GPS phase scintillation was observed at northern and southern high latitudes by arrays of GPS ionospheric scintillation and TEC monitors (GISTMs) and geodetic-quality GPS receivers sampling at 1 Hz. Mapped as a function of magnetic latitude and magnetic local time (ML ...

Prikryl, P.; Ghoddousi-Fard, R.; Spogli, L.; Mitchell, C.; Li, G.; Ning, B.; Cilliers, P.; Sreeja, V.; Aquino, M.; Terkildsen, M.; Jayachandran, P.; Jiao, Y.; Morton, Y.; Ruohoniemi, J.; Thomas, E.; Zhang, Y.; Weatherwax, A.; Alfonsi, L.; De Franceschi, G.; Romano, V.;

Published by: Annales Geophysicae      Published on: 01/2015

YEAR: 2015     DOI: 10.5194/angeo-33-657-2015

Ionosphere; ionospheric disturbance; ionospheric irregularities; polar ionosphere

OVATION Prime-2013: Extension of auroral precipitation model to higher disturbance levels

OVATION Prime (OP) is an auroral precipitation model parameterized by solar wind driving. Distinguishing features of the model include an optimized solar wind-magnetosphere coupling function (dΦ_MP/dt) which predicts auroral power significantly better than\ Kpor other traditional parameters, the separation of aurora into categories (diffuse aurora, monoenergetic, broadband, and ion), the inclusion of seasonal variations, and separate parameter fits for each magnetic latitude (MLA ...

Newell, P.; Liou, K.; Zhang, Y.; Sotirelis, T.; Paxton, L.; Mitchell, E.;

Published by: Space Weather      Published on: Jan-06-2014

YEAR: 2014     DOI: 10.1002/swe.v12.610.1002/2014SW001056

Aurora; forecasting; precipitation

Correction of astigmatism and coma using analytic theory of aberrations in imaging spectrometer based on concentric off-axis dual reflector system

A specific imaging spectrometer based on a concentric off-axis dual reflector system is proposed, free of astigmatism and coma. The described imaging spectrometer consists of four spherical mirrors and a plane grating. The analytic theory of aberrations and the optical path-length concept are used to derive the astigmatism elimination and coma removal. It is shown that the astigmatism in these imaging spectrometers is eliminated by characterizing three angles, and the coma is corrected when unequal mirror radii are config ...

Chen, Ting; Tang, Yi; Zhang, Li; Chang, Yue; Zheng, Cheng;

Published by: Applied Optics      Published on: Jan-01-2014

YEAR: 2014     DOI: 10.1364/AO.53.000565

Equatorial broad plasma depletions associated with the enhanced fountain effect

Lee, Woo; Kil, Hyosub; Kwak, Young-Sil; Paxton, Larry; Zhang, Yongliang; Galkin, Ivan; Batista, Inez;

Published by: Journal of Geophysical Research: Space Physics      Published on: Jan-01-2014

YEAR: 2014     DOI: 10.1002/jgra.v119.110.1002/2013JA019137

The International Reference Ionosphere 2012 \textendash a model of international collaboration

The International Reference Ionosphere (IRI) project was established jointly by the Committee on Space Research (COSPAR) and the International Union of Radio Science (URSI) in the late sixties with the goal to develop an international standard for the specification of plasma parameters in the Earth\textquoterights ionosphere. COSPAR needed such a specification for the evaluation of environmental effects on spacecraft and experiments in space, and URSI for radiowave propagation studies and applications. At the request of C ...

Bilitza, Dieter; Altadill, David; Zhang, Yongliang; Mertens, Chris; Truhlik, Vladimir; Richards, Phil; McKinnell, Lee-Anne; Reinisch, Bodo;

Published by: Journal of Space Weather and Space Climate      Published on: Jan-01-2014

YEAR: 2014     DOI: 10.1051/swsc/2014004

Statistical relationship between large-scale upward field-aligned currents and electron precipitation

Simultaneous observations of Birkeland currents by the constellation of Iridium satellites and N₂\ Lyman-Birge-Hopfield (LBH) auroral emissions measured by the Global Ultraviolet Imager (GUVI) onboard the Thermosphere, Ionosphere, and Mesosphere Energetics and Dynamics (TIMED) satellite are used to establish relationships between large-scale upward field-aligned currents and electron precipitation during stable current configurations. The electron precipitation was inferred from GUVI data using a statistic ...

Korth, Haje; Zhang, Yongliang; Anderson, Brian; Sotirelis, Thomas; Waters, Colin;

Published by: Journal of Geophysical Research: Space Physics      Published on: 08/2014

YEAR: 2014     DOI: 10.1002/2014JA019961

auroral emissions; Birkeland currents; current-precipitation relationship; current-voltage relationship; electron precipitation

In situ spatiotemporal measurements of the detailed azimuthal substructure of the substorm current wedge

The substorm current wedge (SCW) is a fundamental component of geomagnetic substorms. Models tend to describe the SCW as a simple line current flowing into the ionosphere toward dawn and out of the ionosphere toward dusk, linked by a westward electrojet. We use multispacecraft observations from perigee passes of the Cluster 1 and 4 spacecraft during a substorm on 15 January 2010, in conjunction with ground-based observations, to examine the spatial structuring and temporal variability of the SCW. At this time, the spacecr ...

Forsyth, C.; Fazakerley, A.; Rae, I.; Watt, C.; Murphy, K.; Wild, J.; Karlsson, T.; Mutel, R.; Owen, C.; Ergun, R.; Masson, A.; Berthomier, M.; Donovan, E.; Frey, H.; Matzka, J.; Stolle, C.; Zhang, Y.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 02/2014

YEAR: 2014     DOI: 10.1002/2013JA019302

Aurora; Field-aligned current; Magnetosphere; Substorm current wedge; Wedgelets

Reply to comment on \textquotedblleftEmpirical relationship between electron precipitation and far-ultraviolet auroral emissions from DMSP observations\textquotedblright

Sotirelis, Thomas; Korth, Haje; Hsieh, Syau-Yun; Zhang, Yongliang; Morrison, Daniel; Paxton, Larry;

Published by: Journal of Geophysical Research: Space Physics      Published on: Jan-10-2013

YEAR: 2013     DOI: 10.1002/jgra.v118.1010.1002/jgra.50507

Nightside midlatitude ionospheric arcs: TIMED/GUVI observations

Zhang, Yongliang; Paxton, Larry; Kil, Hyosub;

Published by: Journal of Geophysical Research: Space Physics      Published on: Jan-06-2013

YEAR: 2013     DOI: 10.1002/jgra.50327

Empirical relationship between electron precipitation and far-ultraviolet auroral emissions from DMSP observations

Sotirelis, Thomas; Korth, Haje; Hsieh, Syau-Yun; Zhang, Yongliang; Morrison, Daniel; Paxton, Larry;

Published by: Journal of Geophysical Research: Space Physics      Published on: Jan-03-2013

YEAR: 2013     DOI: 10.1002/jgra.50157

An interhemispheric comparison of GPS phase scintillation with auroral emission observed at the South Pole and from the DMSP satellite

Prikryl, Paul; Zhang, Yongliang; Ebihara, Yusuke; Ghoddousi-Fard, Reza; Jayachandran, Periyadan; Kinrade, Joe; Mitchell, Cathryn; Weatherwax, Allan; Bust, Gary; Cilliers, Pierre;

Published by: Annals of Geophysics      Published on:

YEAR: 2013     DOI:

Multi-Instrument Observations at High Latitudes

Miller, E; Paxton, L; Schaefer, RK; Weiss, M; Wolven, BC; Zhang, Y;

Published by:       Published on:

YEAR: 2013     DOI:

SSUSI: A Newly Available Resource for the Upper Atmosphere Community to Study the Global Response of the Coupled Ionosphere Thermosphere System

The Global Ultraviolet Imager (GUVI) on TIMED was actually the 7th wide field of regard instrument built by APL. Five SSUSI instruments were built by APL and delivered, calibrated and ready for flight between 1994 and 1996. Another instrument, the Near Infrared Spectrograph was flown on the NASA NEAR mission using the SSUSI optical design. The first SSUSI flight was in 2003 on the DMSP F16 spacecraft. Two others have flown since then on DMSP F17 and F18. Two more await flight with the next slated for a Spring 2014 launch ...

Paxton, L.; Schaefer, R.~K.; Weiss, M.; Wolven, B.~C.; Zhang, Y.; Miller, E.; Bust, G.~S.; Romeo, G.;

Published by: AGU Fall Meeting Abstracts      Published on:

YEAR: 2013     DOI:

0355 ATMOSPHERIC COMPOSITION AND STRUCTURE Thermosphere: composition and chemistry; 2407 IONOSPHERE Auroral ionosphere; 2415 IONOSPHERE Equatorial ionosphere; 7954 SPACE WEATHER Magnetic storms

SSUSI Aurora Forecast Model

Hsieh, S.~W.; Zhang, Y.; Schaefer, R.~K.; Romeo, G.; Paxton, L.;

Published by: AGU Fall Meeting Abstracts      Published on:

YEAR: 2013     DOI:

2431 IONOSPHERE Ionosphere/magnetosphere interactions; 2447 IONOSPHERE Modeling and forecasting; 2704 MAGNETOSPHERIC PHYSICS Auroral phenomena; 2722 MAGNETOSPHERIC PHYSICS Forecasting

UV Remote Sensing Data Products-Turning Data Into Knowledge

Weiss, M; Paxton, L; Schaefer, RK; Comberiate, J; Hsieh, SW; Romeo, G; Wolven, BC; Zhang, Y;

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YEAR: 2013     DOI:

Empirical Relationship Between LBH Auroral Emissions and Particle Precipitation

Hsieh, SW; Sotirelis, T; Korth, H; Zhang, Y; Paxton, LJ;

Published by:       Published on:

YEAR: 2011     DOI:

Mutual Neutralization of Atomic Oxygen Ions Over the Course of the Solar Cycle and Its Effects on Ionospheric Remote Sensing

Comberiate, J; Demajistre, R; Schaefer, RK; Zhang, Y; Paxton, LJ;

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YEAR: 2011     DOI:

Near real-time assimilation in IRI of auroral peak E-region density and equatorward boundary

Zhang, Yongliang; Paxton, Larry; Bilitza, Dieter; Doe, Rick;

Published by: Advances in Space Research      Published on: Jan-10-2010

YEAR: 2010     DOI: 10.1016/j.asr.2010.06.029

Does the polar cap disappear under an extended strong northward IMF?

Zhang, Yongliang; Paxton, Larry; Newell, Patrick; Meng, Ching-I.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: Jan-12-2009

YEAR: 2009     DOI: 10.1016/j.jastp.2009.09.005

An empirical Kp-dependent global auroral model based on TIMED/GUVI FUV data

Zhang, Y.; Paxton, L.J.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: Jan-06-2008

YEAR: 2008     DOI: 10.1016/j.jastp.2008.03.008

Interplanetary shock induced ring current auroras

Zhang, Yongliang; Paxton, Larry; Zheng, Yihua;

Published by: Journal of Geophysical Research      Published on: Jan-01-2008

YEAR: 2008     DOI: 10.1029/2007JA012554

TIMED/GUVI and DMSP/SSUSI - Data Products for Space Weather

Hsieh, S.; Paxton, L.; Zhang, Y.; Demajistre, R.; Wolven, B.; Morrison, D.; Schaefer, R.;

Published by: AGU Fall Meeting Abstracts      Published on:

YEAR: 2006     DOI:

7900 SPACE WEATHER; 7924 Forecasting (2722); 7934 Impacts on technological systems; 7944 Ionospheric effects on radio waves; 7984 Space radiation environment

AURORA: The Next Generation Space Weather Sensor for NPOESS

Paxton, L; Morrison, D; Santo, A; Ogorzalek, B; Goldsten, J; Boldt, J; Kil, H; Zhang, Y; Demajistre, R; Wolven, B;

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YEAR: 2005     DOI:

Near Simultaneous Observations of the Aurora From FUV, Particle and Photometric Instruments on DMSP-F16, TIMED, and IMAGE

Hecht, JH; Strickland, DJ; Knight, HK; Kochenash, AJ; Zhang, Y; Morrison, MD; Paxton, LJ; Mende, SB; Frey, HU; Burke, WJ;

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YEAR: 2005     DOI:

Testing Auroral Far Ultraviolet (FUV) Remote Sensing Techniques Using Coincident FUV and Particle Data From the DMSP F16 Satellite

Knight, HK; Strickland, DJ; Kochenash, AJ; Hecht, JH; Morrison, D; Zhang, Y; Paxton, LJ; Burke, WJ; Rich, FJ;

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YEAR: 2005     DOI:

The use of far ultraviolet remote sensing to monitor space weather

Paxton, Larry; Morrison, Daniel; Strickland, Douglas; McHarg, M.Geoff; Zhang, Yongliang; Wolven, Brian; Kill, Hyosub; Crowley, Geoff; Christensen, Andrew; Meng, Ching-I;

Published by: Advances in Space Research      Published on: Jan-01-2003

YEAR: 2003     DOI: 10.1016/S0273-1177(02)00886-4

On-orbit calibration of the Special Sensor Ultraviolet Scanning Imager (SSUSI): a far-UV imaging spectrograph on DMSP F-16

Morrison, Daniel; Paxton, Larry; Humm, David; Wolven, Brian; Kil, Hyosub; Zhang, Yongliang; Ogorzalek, Bernard; Meng, Ching-I.;

Published by:       Published on:

YEAR: 2002     DOI: 10.1117/12.454267

Validation of remote sensing products produced by the Special Sensor Ultraviolet Scanning Imager (SSUSI): a far UV-imaging spectrograph on DMSP F-16

Paxton, Larry; Morrison, Daniel; Zhang, Yongliang; Kil, Hyosub; Wolven, Brian; Ogorzalek, Bernard; Humm, David; Meng, Ching-I.;

Published by:       Published on:

YEAR: 2002     DOI: 10.1117/12.454268

Applications of Global Ultraviolet Imaging Data to the Prediction of Satellite Drag in Low-Earth Orbit

Wolven, BC; Paxton, LJ; Morrison, D; Zhu, X; Talaat, E; Zhang, Y; Kil, H; Meng, C; Yee, J;

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YEAR: 2001     DOI: