Results 91 to 100 of about 14,994 (266)

Limb imaging of the Venus O2 visible nightglow with the Venus Monitoring Camera

, 2013
We investigated the Venus O2 visible nightglow with imagery from the Venus Monitoring Camera on Venus Express. Drawing from data collected between April 2007 and January 2011, we study the global distribution of this emission, discovered in the late 70s ...
Hueso, R., Markiewicz, W. J., Muñoz, A. García, Opitz, A., Sánchez-Lavega, A., Titov, D. V., Witasse, O.   +6 more
core   +1 more source

FUSE observations of the HI interstellar gas of IZw18 [PDF]

, 2003
We present the analysis of FUSE observations of the metal-deficient dwarf galaxy IZw18. We measured column densities of HI, NI, OI, ArI, SiII, and FeII. The OI/HI ratio (log(OI/HI)=-4.7^{+0.8}_{-0.6}) is consistent with the O/H ratio observed in the HII ...
A. Lecavelier des Etangs, , A. Vidal-Madjar, Brown, D. Kunth, G. Callejo, G. Hébrard, Hébrard, Izotov, J.-M. Désert, Jenkins, Kunth, Kunth, Kunth, Lecavelier des Etangs, Lemoine, Lequeux, Levshakov, Moos, Pettini, Pettini, R. Ferlet, Sahnow, Savage, Sembach, Thuan, Thuan, Thuan, V. Lebouteiller, van Zee, van Zee, Vidal-Madjar, Wakker   +31 more
core   +2 more sources

Periodic waves in the lower thermosphere observed by OI630 nm airglow images

, 2016
. Periodic wave structures in the thermosphere have been observed at Sao Joao do Cariri (geographic coordinates: 36.5° W, 7.4° S; geomagnetic coordinates based on IGRF model to 2015: 35.8° E, 0.48° N) from September 2000 to November 2010 using OI630.0 nm
I. Paulino, A. Medeiros, S. Vadas, C. Wrasse, H. Takahashi, R. Buriti, D. Leite, S. Filgueira, J. Bageston, J. Sobral, D. Gobbi   +10 more
semanticscholar   +1 more source

First Coincident Radar and Optical Observations of a Meteor Radio Afterglow

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract It has been hypothesized that Meteor Radio Afterglows (MRAs) occur due to resonant transition radiation (RTR) where suprathermal electrons emit as they pass through electron density inhomogeneities in a turbulent plasma. Meteor trails are thought to produce suprathermal electrons through anion oxidation, which can be identified through meteor ...
K. S. Obenberger, J. L. Chau, J. Vierinen, D. Vida, L. E. Cordonnier, Z. Balint, M. Clahsen, E. Dao, J. Dowell, J. M. Holmes, R. F. Kelly, D. Kastinen, N. Pfeffer, K. Robinson, G. B. Taylor, J. M. Urco   +15 more
wiley   +1 more source

Upper atmosphere research at the Instituto Nacional de Pesquisas Espaciais of Brazil [PDF]

Geofísica Internacional, 2004
Upper atmosphere research at the Instituto Nacional de Pesquisas Espaciais of Brazil is concentrated in the areas of photochemistry and dynamics of the mesopause and lower thermosphere, middle atmosphere climatology, and stratospheric aerosols.
D. M. Simonich, A. F. de Medeiros, D. Gobbi, H. Takahashi, P. P. Batista, R. Clemesha   +5 more
doaj  

First observation of the Venus UV dayglow at limb from SPICAV/VEX

Geophysical Research Letters, 2012
We present the first limb observations of the dayglow emissions by the UV channel of SPICAV aboard Venus Express between October and December 2011. The CO Cameron bands between 180–260 nm and CO2+ doublet at 289 nm are clearly identified for the first ...
Jean‐Yves Chaufray, Jean‐Loup Bertaux, Francois Leblanc   +2 more
doaj   +1 more source

Observations of Diffuse Ultraviolet Emission from Draco

, 2010
We have studied small scale (2 arcmin) spatial variation of the diffuse UV radiation using a set of 11 GALEX deep observations in the constellation of Draco.
Boffi, Chatterjee, Fazio, Gordon, Hammer, Henry, Henry, Jayant Murthy, Kurucz, Lacy, Lilienthal, Lockman, Luciana Bianchi, Martin, Miville-Deschenes, Morrissey, Murthy, N. V. Sujatha, Park, Perryman, Rahul Suresh, Richard Conn Henry, Rieke, Sujatha, Sujatha, Sujatha, Wells, Werner, Xu   +28 more
core   +1 more source

Thermospheric Energy and Heating Due To Upward Propagating and in Situ Generated Tides During Solar Cycle 24

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We investigate vertical and horizontal energy transport and associated heating in the thermosphere due to both upward propagating and in situ generated migrating and nonmigrating diurnal and semidiurnal tides over the solar cycle 24 (2009–2019).
Mukta Neogi, Jens Oberheide, Xian Lu
wiley   +1 more source

Study on the Imaging Interference of a Vortex-Light-Modulated Gaussian Beam

Photonics
Combined with vortex light and airglow, some different physical phenomena are presented in this paper. Based on the ground-based airglow imaging interferometer (GBAII) made by our group, a liquid crystal on silicon (LCoS) device on one arm of a wide ...
Yanghe Liu, Yuanhe Tang, Jian Zhou, Cunxia Li, Ningju Hui, Yishan Zhang, Yanlong Wang   +6 more
doaj   +1 more source

Registering upper atmosphere parameters in East Siberia with Fabry–Perot Interferometer KEO Scientific “Arinae”

Solar-Terrestrial Physics, 2017
We describe the Fabry—Perot interfero-meter designed to study Earth’s upper atmosphere. We propose a modification of the existing data processing method for determining the Doppler shift and Doppler widening and also for separating the observed line ...
Vasilyev R.V., Artamonov M.F., Beletsky A.B., Zherebtsov G.A., Medvedeva I.V., Mikhalev A.V., Syrenova T.E.   +6 more
doaj   +1 more source