GUVI Biblio | guvitimed.jhuapl.edu

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Found 215 entries in the Bibliography.

Showing entries from 151 through 200

2005

Observations of solar and magnetospheric inputs and atmospheric responses to the January 2005 long duration flares and fast coronal mass ejections

Paxton, LJ; Kozyra, J; Demajistre, B; Kil, H; Morrison, D; Wolven, B; Mitchell, D; Brandt, P; Zhang, Y; Meng, C;

Published by: Published on:

YEAR: 2005 DOI:

2004

Coincident equatorial bubble detection by TIMED/GUVI and ROCSAT-1

Kil, Hyosub; Su, S.-Y.; Paxton, L.; Wolven, B.; Zhang, Y.; Morrison, D.; Yeh, H.;

Published by: Geophysical Research Letters Published on: Jan-01-2004

YEAR: 2004 DOI: 10.1029/2003GL018696

O/N ₂ changes during 1--4 October 2002 storms: IMAGE SI-13 and TIMED/GUVI observations

Thermospheric O/N₂ column density ratios referenced at a N₂ column density of 10¹⁷ cm^-2 are obtained using the IMAGE SI-13 and TIMED/GUVI far-ultraviolet (FUV) dayglow data, AURIC simulation results, and MSIS86 model. Each of the magnetic storms occurring during a 4-day period (1\textendash4 October 2002) caused significant O/N₂ depletion that was detected by both of the IMAGE SI-13 and GUVI instruments. The depletion extended down to latitudes of 10\textdegree and -5 ...

Zhang, Y.; Paxton, L.; Morrison, D.; Wolven, B.; Kil, H.; Meng, C.-I.; Mende, S.; Immel, T.;

Published by: Journal of Geophysical Research Published on: 10/2004

YEAR: 2004 DOI: 10.1029/2004JA010441

Magnetic storm; thermospheric composition change

Double dayside detached auroras: TIMED/GUVI observations

On August 19, 2003, TIMED/GUVI detected, for the first time, two separated (double) dayside detached auroras (D-DDA) simultaneously in all the GUVI channels, 121.6 nm, 135.6 nm, LBHS, and LBHL. The D-DDA was located at magnetic latitudes around -57\textdegree and -63\textdegree (L shell 3.4 and 4.9) in the 0900\textendash1030 MLT region. The high-latitude part of the D-DDA is much brighter than the low-latitude part. DMSP particle observation indicates that the source of the D-DDA is energetic (\~10 keV) precipitating pro ...

Zhang, Y.; Paxton, L.; Meng, C.-I.; Morrison, D.; Wolven, B.; Kil, H.; Christensen, A.;

Published by: Geophysical Research Letters Published on: 05/2004

YEAR: 2004 DOI: 10.1029/2003GL018949

F -region plasma distribution seen from TIMED/GUVI and its relation to the equatorial spread F activity

The OI 135.6-nm nightglow images from GUVI on board the TIMED satellite provide a unique opportunity to investigate the global plasma distribution in the F region. We report that there exist large seasonal-longitudinal variations in the F-region plasma density which may explain some aspects of the equatorial spread F (ESF) morphology. We suggest that an occurrence of high plasma density is responsible for the strong ESF activity during equinox periods at most longitudes, whereas an occurrence of ...

Kil, Hyosub; DeMajistre, Robert; Paxton, L.;

Published by: Geophysical Research Letters Published on: 03/2004

YEAR: 2004 DOI: 10.1029/2003GL018703

GUVI/TIMED Observations of the auroral inputs and thermospheric response during the October and November 2003 Superstorms

Zhang, Y; Paxton, LJ; Kozyra, JU; DeMajistre, R; Kil, H; Morrison, D; Wolven, B; Brandt, PC; Mitchell, DG; Talaat, E;

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YEAR: 2004 DOI:

Statistical Analysis of Equatorial Spread F Activity Seen From TIMED/GUVI

Comberiate, JM; Krekeler, JM; Kamalabadi, F; Paxton, LJ; Kil, H;

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YEAR: 2004 DOI:

A climatology of the nighttime ionosphere acquired by the TIMED/GUVI instrument and the changes associated with storm time

DeMajistre, R; Kil, H; Paxton, LJ;

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YEAR: 2004 DOI:

Observational and Modeling Analysis of the Coupling Between Neutral Winds and the Low-Latitude Ionosphere

Talaat, ER; DeMajistre, R; Yee, J; Paxton, LJ; Crowley, G; Palo, S; Christensen, AB; Azeem, I; Roble, R; Kil, H; , others;

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YEAR: 2004 DOI:

Observations of the Ionospheric and Thermospheric Response During the October and November 2003 Storms

Paxton, L; Crowley, G; Zhang, Y; DeMajistre, R; Kil, H; Morrison, D; Wolven, B; Straus, P; Christensen, A;

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YEAR: 2004 DOI:

Far Ultraviolet Imaging of the low-Latitude Nightside Ionosphere with the GUVI Instrument on TIMED

Paxton, LJ; Kil, H; DeMajistre, R; Morrison, D; Straus, P; Talaat, E; Christensen, A; Wolven, B; Zhang, Y; Crowley, G; , others;

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YEAR: 2004 DOI:

F-region plasma distribution seen from TIMED/GUVI and its relation to the equatorial spread F activity

Kil, Hyosub; DeMajistre, Robert; Paxton, Larry;

Published by: Geophysical research letters Published on:

YEAR: 2004 DOI:

The nighttime F-region climatology during magnetically quiet periods seen from TIMED/GUVI and DMSP

Kil, H; Paxton, L; Zhang, Y; Wolven, B; Morrison, D;

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YEAR: 2004 DOI:

Storm-time modifications of the mid-latitude nighttime ionosphere measured by the TIMED/GUVI instrument

Eichert, J; DeMajistre, R; Paxton, LJ; Kil, H; Talaat, E;

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YEAR: 2004 DOI:

GUVI: a hyperspectral imager for geospace

The Global Ultraviolet Imager (GUVI) is an imaging spectrometer on the NASA TIMED spacecraft which was launched on December 7, 2001. This instrument produces a far ultraviolet (FUV) data cube of spatial and spectral information at each step of a scan mirror - that scan mirror covers 140 deg in the cross track direction - a span that includes on limb. GUVI produces simultaneous monochromatic images at five "colors" (121.6 nm, 130.4 nm, 135.6 nm, and in broader bands at 140-150 nm and 165-180 nm) as its field of view is sca ...

Paxton, L.; Christensen, Andrew; Morrison, Daniel; Wolven, Brian; Kil, Hyosub; Zhang, Yongliang; Ogorzalek, Bernard; Humm, David; Goldsten, John; DeMajistre, Robert; Meng, Ching-I.;

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YEAR: 2004 DOI: 10.1117/12.579171

2003

The use of far ultraviolet remote sensing to monitor space weather

This paper discusses the connection between changes in Earth\textquoterights thermosphere and ionosphere induced by changes in the Earth\textquoterights local space environment (or \textquotedblleftspace weather\textquotedblright) and the phenomena observed in far ultraviolet images of the Earth. Two new experiments, the Global Ultraviolet Imager (GUVI) and the Special Sensor Ultraviolet Imager (SSUSI), will provide a new capability for monitoring changes in thermospheric composition and ionospheric density as they change ...

Paxton, L.; 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

Case study of the 15 July 2000 magnetic storm effects on the ionosphere-driver of the positive ionospheric storm in the winter hemisphere

The ionospheric response to the magnetic storm of 15 July 2000 is investigated using the global total electron content (TEC) maps provided by global positioning system and the measurements of ion density, composition, and drift velocity from the Defense Meteorological Satellite Program (DMSP) F13 and F15 spacecraft. The global TEC maps showed clear seasonal effects that can be characterized by a dominance of a negative ionospheric storm (decrease in plasma density) in the summer (northern) hemisphere and the pronounced po ...

Kil, Hyosub; Paxton, L.; Pi, X.; Hairston, M.; Zhang, Y.;

Published by: Journal of Geophysical Research Published on: 11/2003

YEAR: 2003 DOI: 10.1029/2002JA009782

ionosphere-thermosphere coupling; Ionospheric storm; thermospheric disturbance

The first coordinated ground- and space-based optical observations of equatorial plasma bubbles

We report on ionospheric optical emissions detected by the GUVI instrument on the TIMED satellite. As the satellite crosses the equatorial zone the bright Appleton Anomaly region is imaged. Often these bright zones are interrupted by regions slanted from west to east as the equator is approached forming a backwards \textquoteleftC\textquoteright-shape in the image. To explain this feature we use simultaneous ground-based observations looking equatorward from Hawaii using the 777.4-nm emission. We also compare these optica ...

Kelley, Michael; Makela, J.; Paxton, L.; Kamalabadi, F.; Comberiate, J.; Kil, H.;

Published by: Geophysical Research Letters Published on: 07/2003

YEAR: 2003 DOI: 10.1029/2003GL017301

Automatic Detection of Equatorial Plasma Bubbles in GUVI Data

Henderson, S; Swenson, C; Straus, P; Kil, H; Christensen, A; Paxton, L; Morrison, D; Crowley, G; Meier, R; Craven, J; , others;

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YEAR: 2003 DOI:

Space Weather Effects of the April 15-23 2002 Geomagnetic Storm

Hackert, C; Crowley, G; Paxton, L; Christensen, A; Kil, Y; Zhang, Y; Morrison, D; Goncharenko, L; Makela, J; Sahai, Y; , others;

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YEAR: 2003 DOI:

TIMED instruments

Yee, Jeng-Hwa; Talaat, Elsayed; Christensen, Andrew; Killeen, Timothy; Russell, James; Woods, Thomas;

Published by: Johns Hopkins APL Technical Digest Published on:

YEAR: 2003 DOI:

TIMED science: First light

Talaat, Elsayed; Yee, Jeng-Hwa; Christensen, Andrew; Killeen, Timothy; Russell, James; Woods, Thomas;

Published by: Johns Hopkins APL technical digest Published on:

YEAR: 2003 DOI:

F-Region Plasma Distribution seen from TIMED/GUVI and its Effect on the Equatorial Spread F Activity

Kil, H; DeMajistre, R; Paxton, L; Zhang, Y; Wolven, B; Morrison, D; Meng, C;

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YEAR: 2003 DOI:

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

Hsieh, Syau-Yun; Paxton, Larry; Zhang, Yongliang; Schaefer, Robert; DeMajistre, Robert; Wolven, Brian; Morrison, Daniel; Comberiate, Joseph; Kil, Hyosub;

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YEAR: 2003 DOI:

GUVI nighttime observations of the equatorial and mid-latitude ionosphere

Straus, PR; Paxton, LJ; Crowley, G; Henderson, S; Kil, H; Morrison, D; Swenson, C; Christensen, AB;

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YEAR: 2003 DOI:

Studies on the coupling between the neutral winds and the ionosphere at low latitudes

Talaat, ER; DeMajistre, R; Kil, H; Yee, JH; Paxton, L; Azeem, SM; Crowley, G; Christensen, A; Roble, RG;

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YEAR: 2003 DOI:

Retrieval of thermospheric temperature and N2, O, and O2 concentrations from GUVI limb scans

Meier, RR; Strickland, DJ; Picone, JM; Christensen, AB; Paxton, LJ; Morrison, D; Kil, H; Bishop, J; Drob, D; Craven, JD; , others;

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YEAR: 2003 DOI:

Space Weather in the ITM: The May-June 2003 Storm and NASA TIMED/GUVI Observations and TIMEGCM Model Results

Paxton, LJ; Zhang, Y; Crowley, G; DeMajistre, R; Kil, H; Kusterer, T; Morrison, D; Wolven, B; Meng, C; Christensen, AB; , others;

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YEAR: 2003 DOI:

FUV Spectroscopy of the Dayglow and Aurora from the TIMED/GUVI Sensor

Wolven, B; Morrison, D; Paxton, L; Zhang, Y; Kil, H; Meng, CI; Christensen, AB;

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YEAR: 2003 DOI:

Low-Latitude Ionospheric Plasma Depletions: Imaging, Modeling, and Interpretation Using Space-Based Ultraviolet Measurements

Comberiate, JM; Kamalabadi, F; Paxton, L; Kil, H;

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YEAR: 2003 DOI:

Detection and Mapping of Plasma Bubbles With the Global Ultraviolet Imager

Kamalabadi, F; Comberiate, J; Paxton, L; Kil, H;

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YEAR: 2003 DOI:

The first coordinated ground-and space-based optical observations of equatorial plasma bubbles

Kelley, Michael; Makela, Jonathan; Paxton, Larry; Kamalabadi, Farzad; Comberiate, Joseph; Kil, Hyosub;

Published by: Geophysical Research Letters Published on:

YEAR: 2003 DOI:

Initial observations with the Global Ultraviolet Imager (GUVI) in the NASA TIMED satellite mission

The Global Ultraviolet Imager (GUVI) instrument carried aboard the NASA TIMED satellite measures the spectral radiance of the Earth\textquoterights far ultraviolet airglow in the spectral region from 120 to 180 nm using a cross-track scanning spectrometer design. Continuous operation of the instrument provides images of the Earth\textquoterights disk and limb in five selectable spectral bands. Also, spectra at fixed scanning mirror position can be obtained. Initial results demonstrate the quantitative functionality of the ...

Christensen, AB; Paxton, LJ; Avery, S; Craven, J; Crowley, G; Humm, DC; Kil, H; Meier, RR; Meng, C-I; Morrison, D; , others;

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

YEAR: 2003 DOI: 10.1029/2003JA009918

airglow; AURORA; ultraviolet; imaging; satellite; atmosphere

Negative ionospheric storms seen by the IMAGE FUV instrument

Data from the IMAGE SI-13 instrument are used to study depletions in the OI 135.6 nm dayglow intensity due to two magnetic storms observed on 8 June and 15 July 2000. Results show that the SI-13 instrument is sensitive to changes in the 135.6 nm dayglow caused by depletion of the O/N₂\ column density ratio. It is found that depletion levels in the SI-13 images are weaker than those in the true O/N₂\ values or electron density parameters, such as NmF2 (peak F2 electron density) due to the N< ...

Zhang, Y.; Paxton, L.J.; Kil, H.; Meng, C.-I.; Mende, S.~B.; Frey, H.~U.; Immel, T.~J.;

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

YEAR: 2003 DOI: 10.1029/2002JA009797

Atmospheric Composition and Structure: Airglow and aurora; Atmospheric Composition and Structure: Thermosphere-composition and chemistry; atmospheric composition change; depletion of OI 135.6 nm dayglow; Ionosphere: Ionospheric disturbances; Ionosphere: Plasma temperature and density; Magnetospheric Physics: Storms and substorms; negative ionospheric storms

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

2002

Characterization of Low Latitude Ionospheric Plasma Depletions Using Space-Based Ultraviolet Imaging

Comberiate, JM; Kamalabadi, F; Paxton, LJ; Kil, H;

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YEAR: 2002 DOI:

TIMED/GUVI observations of the equatorial anomaly: first-principles model comparisons

Straus, P; Crowley, G; Paxton, L; Christensen, A; Morisson, D; Kil, H;

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