|
Notice:
|
Found 140 entries in the Bibliography.
Showing entries from 51 through 100
| 2005 |
|
SSUSI and GUVI limb scans of thermospheric neutral density changes during a geomagnetic storm
Stephan, AW; Picone, JM; Meier, RR; Emmert, JT; Paxton, LJ; Morrison, D; Wolven, B; Kil, H; Published by: Published on: |
|
Paxton, LJ; Kozyra, J; Demajistre, B; Kil, H; Morrison, D; Wolven, B; Mitchell, D; Brandt, P; Zhang, Y; Meng, C; Published by: Published on: |
|
A Virtual Metadata Generator for the TIMED Program
Morrison, D; Weiss, M; Daley, R; Immer, E; Hashemian, M; Nylund, S; Skura, J; Published by: Published on: |
| 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 |
|
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 |
|
Height-integrated Joule and auroral particle heating in the night side high latitude thermosphere Energy deposited at high latitudes by Joule and auroral particle heating perturbs the chemistry and dynamics of the neutral thermosphere. Height-integrated heating rates can be calculated by combining Super Dual Auroral Radar Network (SuperDARN) measurements with TIMED spacecraft Global Ultraviolet Imager (GUVI) auroral images. Spatial maps of heating rates are examined during two TIMED orbits and statistical averages are presented for quiet to moderate levels of geomagnetic activity. Joule heating dominates in the evenin ... Baker, JBH; Zhang, Y; Greenwald, RA; Paxton, LJ; Morrison, D; Published by: Geophysical research letters Published on: 05/2004 YEAR: 2004 DOI: 10.1029/2004GL019535 |
|
In this work we will present a method for retrieving nighttime electron density profiles from OI 135.6 nm limb emissions measured by the Global Ultraviolet Imager (GUVI) aboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission spacecraft. The primary mechanism for 135.6 nm radiance in the nighttime thermosphere is recombination of O+ ions, and the volume emission rate is approximately proportional to the square of the electron density. Herein we describe a two-step inversion method ... DeMajistre, R.; Paxton, L.; Morrison, D.; Yee, J.-H.; Goncharenko, L.; Christensen, A.; Published by: Journal of Geophysical Research Published on: 04/2004 YEAR: 2004 DOI: 10.1029/2003JA010296 Electron density; inversion; low-latitude ionosphere; TIMED/GUVI |
|
Quiet-time seasonal behavior of the thermosphere seen in the far ultraviolet dayglow The TIMED/GUVI instrument is a far ultraviolet spectrograph that obtains images in five spectrally resolved wavelength channels. These images yield information on the dayside composition, temperature, solar EUV flux, large-scale wave structures, and auroral processes. In this paper we present an overview analysis of Earth-disk images for four seasons (March, July, and September 2002 and January 2003). Days were selected during geomagnetically quiet periods when the Sun was nearly in the orbital plane (noon orbits). Two of ... Strickland, D.; Meier, R.; Walterscheid, R.; Christensen, A.; Paxton, L.; Morrison, D.; Craven, J.; Crowley, G.; Published by: Journal of Geophysical Research Published on: 01/2004 YEAR: 2004 DOI: 10.1029/2003JA010220 far ultraviolet; remote sensing; seasonal behavior; thermosphere |
|
Zhang, Y; Paxton, LJ; Kozyra, JU; DeMajistre, R; Kil, H; Morrison, D; Wolven, B; Brandt, PC; Mitchell, DG; Talaat, E; Published by: Published on: |
|
Hecht, JH; Strickland, DJ; Conde, MG; Morrison, MD; Published by: Published on: |
|
Retrievals of nighttime electron density from TIMED Global Ultraviolet Imager (GUVI) measurements
DeMajistre, R; Paxton, LJ; Morrison, D; Yee, JH; Goncharenko, L; Christensen, A; Published by: J. Geophys. Res Published on: |
|
Evidence for bimodal particle distribution from the spectra of polar mesospheric clouds
Carbary, JF; Morrison, D; Romick, GJ; Published by: Geophysical research letters Published on: |
|
A Comparison of LORAAS and GUVI Observations of the Low-Latitude Ionosphere
McDonald, SE; Makela, JJ; Meier, RR; Dymond, KF; Thonnard, SE; Budzien, SA; Christensen, AB; Paxton, LJ; Morrison, D; McCoy, RP; Published by: Published on: |
|
Paxton, L; Crowley, G; Zhang, Y; DeMajistre, R; Kil, H; Morrison, D; Wolven, B; Straus, P; Christensen, A; Published by: Published on: |
|
Effect of The October-November 2003 Super-storms On Thermospheric Density and Composition
Crowley, G; Tapley, B; Bettadpur, S; Cheng, M; Paxton, LJ; Zhang, Y; Morrison, D; Christensen, A; Meier, R; Strickland, DJ; Published by: Published on: |
|
Global Thermosphere-Ionosphere Response to the October-November 2003 Storms
Bronn, J; Crowley, G; Hackert, C; Meier, R; Paxton, L; Strickland, D; Christensen, A; Morrison, D; Zhang, Y; Straus, P; , others; Published by: Published on: |
|
Looking at the November 20, 2003 super storm with TIMED/GUVI: Comparison with the TIMEGCM
Meier, RR; Crowley, G; Strickland, DJ; Christensen, A; Paxton, L; Morrison, D; Published by: Published on: |
|
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; Published by: Published on: |
|
DeMajistre, R; Paxton, LJ; Morrison, D; Yee, JH; Goncharenko, LP; Christensen, AB; Published by: Journal of Geophysical Research-Part A-Space Physics Published on: |
|
The Need for an Integrated Ionosphere-Thermosphere Data System: Lessons Learned from the GUVI DP POC
Holland, D; Weiss, MB; Morrison, DD; Paxton, LJ; Eichert, J; Published by: Published on: |
|
O/N2 Changes During 1\~ 4 October 2002 Storms: IMAGE SI δΈ€ 13 and TIMED
Zhang, Y; Paxton, LJ; Morrison, D; , others; Published by: GUVI Observations [J1. Journal of Geophysical Research, 2004, 109 (A10308): 1-16 Published on: |
|
TIMED GUVI and SEE Observations of Solar Irradiance Variations and the Terrestrial Airglow Response
Wolven, B; Paxton, L; Morrison, D; Woods, T; Published by: Published on: |
|
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; Published by: Published on: |
|
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.; Published by: Published on: YEAR: 2004 DOI: 10.1117/12.579171 |
|
Solar EUV irradiance variability derived from terrestrial far ultraviolet dayglow observations Remotely sensed ultraviolet emissions from the Earth s upper atmosphere are shown to mirror fluctuations in solar EUV irradiance during July 2002, including the overall increase and decrease as the Sun rotated, and episodic increases associated with multiple solar flares. The TIMED/GUVI dayglow observations are used to derive a new quantity, QEUVGUVI, which is a measure of integrated solar EUV electromagnetic energy shortward of 45 nm. Both the absolute QEUVGUVI values and their modulation by solar rotation agree well with t ... Strickland, D.J.; Lean, J.L.; Meier, R.R.; Christensen, A.B.; Paxton, L.J.; Morrison, D.; Craven, J.D.; Walterscheid, R.L.; Judge, D.L.; McMullin, D.R.; Published by: Geophysical research letters Published on: YEAR: 2004 DOI: 10.1029/2003GL018415 |
| 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 |
|
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; Published by: Published on: |
|
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; Published by: Published on: |
|
Height-integrated Joule and particle heating rates determined by TIMED GUVI and SuperDARN
Baker, JB; Zhang, Y; Greenwald, RA; Paxton, LJ; Morrison, D; Published by: Published on: |
|
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; Published by: Published on: |
|
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; Published by: Published on: |
|
Ultraviolet imaging and spectrographic imaging of polar mesospheric clouds
Carbary, JF; Morrison, D; Romick, GJ; Published by: Advances in Space Research Published on: |
|
Craven, JD; Strickland, DJ; Meier, RR; Crowley, G; Christensen, AB; Paxton, LJ; Morrison, D; Avery, SK; Meng, C; Straus, PR; , others; Published by: Published on: |
|
Maps of polar mesospheric clouds
Carbary, JF; Morrison, Danny; Romick, GJ; Published by: Journal of Geophysical Research: Atmospheres Published on: YEAR: 2003 DOI: 10.1029/2002JD002255 |
|
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; Published by: Published on: |
|
Strickland, DJ; Hecht, JH; Meier, RR; Conde, M; Christensen, AB; Morrison, D; Published by: Published on: |
|
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; Published by: Published on: |
|
Paxton, LJ; Zhang, Y; Crowley, G; DeMajistre, R; Kil, H; Kusterer, T; Morrison, D; Wolven, B; Meng, C; Christensen, AB; , others; Published by: Published on: |
|
The Hump in the Ultraviolet Spectra of Polar Mesospheric Clouds
Morrison, D; Carbary, J; Yee, J; Published by: Published on: |
|
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; Published by: Published on: |
|
Auroral Energy and Energy Flux Measurements using GUVI
Holley, KE; McHarg, MG; Paxton, L; Zhang, Y; Morrison, D; Published by: Published on: |
|
Weiss, M; Morrison, D; Paxton, L; Barnes, R; Published by: Published on: |
|
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 |
|
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: 2455 Particle precipitation; 2704 Auroral phenomena (2407); 2724 Magnetopause; and boundary layers; cusp |
| 2002 |
|
Products Derived From GUVI Dayglow and Auroral Data
Strickland, DJ; Christensen, A; Meier, R; Paxton, L; Morrison, D; Craven, J; Crowley, G; Waltersheid, R; Avery, S; Meng, C; Published by: Published on: |
|
Global Ultaviolet Imager (GUVI): on-Orbit Performance and Initial Results
Christensen, AB; Strickland, D; Paxton, L; Morrison, D; Crowley, G; Meier, R; Craven, J; Meng, C; Swenson, C; Walterscheid, R; , others; Published by: Published on: |
|
Craven, JD; Strickland, DJ; Meier, RR; Crowley, G; Christensen, AB; Paxton, LJ; Morrison, D; Avery, SK; Meng, C; Straus, PR; , others; Published by: Published on: |
|
Thermospheric composition derived from TIMED/GUVI limb scans
Meier, RR; Strickland, DJ; Christensen, AB; Paxton, LJ; Morrison, MD; Craven, JD; Crowley, G; Walterscheid, RL; Avery, SK; Meng, CI; Published by: Published on: |
|
Particle characteristics from the spectra of polar mesospheric clouds
Carbary, JF; Morrison, D; Romick, GJ; Published by: Journal of Geophysical Research: Atmospheres Published on: |