GUVI Biblio





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Found 9 entries in the Bibliography.


Showing entries from 1 through 9


2014

Local Geomagnetic Indices and the Prediction of Auroral Power

The aurora has been related to magnetometer observations for centuries, and to geomagnetic indices for decades. As the number of stations and data processing power increases, just how auroral power (AP) relates to geomagnetic observations becomes a more tractable question. This paper compares Polar UVI AP observations during 1997 with a variety of indices. Local time (LT) versions of the SuperMAG auroral electrojet (SME) are introduced and examined, along with the corresponding upper and lower envelopes (SMU< ...

Newell, P.; Gjerloev, J.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 12/2014

YEAR: 2014     DOI: 10.1002/2014JA020524

AURORA; auroral electrojet; indices; Pedersen current; Prediction

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 (dΦMP/dt) which predicts auroral power significantly better than\ Kp\ or 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 latitu ...

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

Published by: Space Weather      Published on: 06/2014

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

AURORA; precipitation; forecasting

2013

Statistical comparison of isolated and non-isolated auroral substorms

The present study compares isolated and non-isolated substorms in terms of their global morphology and energy deposition. The analysis is based on a list of geomagnetic substorm onsets identified with magnetometer data from SuperMAG and published previously by Newell and Gjerlove (2011a). Isolated substorms are defined as those with separation of two consecutive onsets no less than 3 h. The auroral data are obtained from the global ultraviolet imager (GUVI) on board the TIMED satellite and are rebinned into typical magnet ...

Liou, Kan; Newell, Patrick; Zhang, Yong-Liang; Paxton, Larry;

Published by: Journal of Geophysical Research: Space Physics      Published on: 05/2013

YEAR: 2013     DOI: 10.1002/jgra.50218

auroral power; auroral substorm; GUVI; SuperMAG; TIMED

2012

Evaluation of OVATION Prime as a forecast model for visible aurorae

This study evaluates the ability of the OVATION Prime auroral precipitation model to provide operational forecasts of the visible aurora. An operational implementation would primarily provide the general public with some guidance for viewing the aurora. We evaluate the likelihood that if aurorae are predicted to be visible at a location, they will be seen there within the hour. Nighttime model forecasts were validated with Polar Ultraviolet Imager data for Kp >= 3 and for the years 1997 and 1998. The overall fore ...

Machol, Janet; Green, Janet; Redmon, Robert; Viereck, Rodney; Newell, Patrick;

Published by: Space Weather: The International Journal of Research and Applications      Published on: 09/2012

YEAR: 2012     DOI: 10.1029/2011SW000746

AURORA; model

2011

Reversed two-cell convection in the Northern and Southern hemispheres during northward interplanetary magnetic field

Lu, G.; Li, W.; Raeder, J.; Deng, Y.; Rich, F.; Ober, D.; Zhang, Y.; Paxton, L.; Ruohoniemi, J.; Hairston, M.; Newell, P.;

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

YEAR: 2011     DOI: 10.1029/2011JA017043

TIMED/GUVI observation of solar illumination effect on auroral energy deposition

Liou, K.; Zhang, Y.-L.; Newell, P.; Paxton, L.; Carbary, J.;

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

YEAR: 2011     DOI: 10.1029/2010JA016402

2010

Predictive ability of four auroral precipitation models as evaluated using Polar UVI global images

Newell, P.; Sotirelis, T.; Liou, K.; Lee, A.; Wing, S.; Green, J.; Redmon, R.;

Published by: Space Weather      Published on: Jan-01-2010

YEAR: 2010     DOI: 10.1029/2010SW000604

2005

Far-ultraviolet signature of polar cusp during southward IMF Bz observed by TIMED/Global Ultraviolet Imager and DMSP

The coincident TIMED/Global Ultraviolet Imager (TIMED/GUVI) optical and DMSP particle observations have revealed new features of the optical signature of the polar cusp under a southward interplanetary magnetic field (IMF). We have found that cusp auroras usually take the shape of a thin arc with a width around 100\textendash200 km. This provides the first far-ultraviolet evidence of the narrow cusp under a southward IMF [

Zhang, Y; Meng, C-I; Paxton, LJ; Morrison, D; Wolven, B; Kil, H; Newell, P; Wing, S; Christensen, AB;

Published by: Journal of Geophysical Research: Space Physics (1978\textendash2012)      Published on:

YEAR: 2005     DOI: 10.1029/2004JA010707

cusp aurora

2003

Optical Signature of Polar Cusp During Southward IMF Bz Observed by TIMED/GUVI and DMSP

The GUVI instrument on board the TIMED satellite provides unique multi-wavelength observations of polar region emissions. In this study we focus on the identification of the polar cusp region during southward IMF conditions. Using simultaneous DMSP particle observations, the optical signatures and dynamics of the polar cusp region are investigated. We will address which of the five GUVI wavelengths can best be used for optical identification of the cusp precipitation by comparing images of various wavelengths. These new G ...

Zhang, Y.; Meng, C.~I.; Paxton, L.~J.; Morrison, D.; Wolven, B.; Kil, H.; Newell, P.; Wing, S.; Christensen, A.~B.;

Published by: AGU Fall Meeting Abstracts      Published on:

YEAR: 2003     DOI:

2455 Particle precipitation; 2704 Auroral phenomena (2407); 2724 Magnetopause; and boundary layers; cusp



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