Results 71 to 80 of about 12,606 (256)

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

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

Where is the best site on Earth? Domes A, B, C and F, and Ridges A and B [PDF]

, 2009
The Antarctic plateau contains the best sites on earth for many forms of astronomy, but none of the existing bases was selected with astronomy as the primary motivation.
Ashley, Michael C. B., Kato, Seiji, Kulesa, Craig, Lawrence, Jon S., Liu, Guiping, Minnis, Patrick, Saunders, Will, Storey, John W. V., Winker, David M.   +8 more
core   +1 more source

Evidence and Causes of an Unusual Super Plasma Bubble Occurrence During Weak Geomagnetic Conditions Over Europe

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Using data from a cluster of ground‐based global navigation satellite system, we observed spatially extended enhanced ROTI over the European longitudes during a weak geomagnetic storm (Dst ≈ ${\approx} $ −50 nT) on 4 November 2023. The enhanced ROTI is extended over an extensive geographical latitudinal range of 46°N.
Chandan Kapil, Mani Sivakandan, Jorge Chau, Gopi K. Seemala, David Altadill   +4 more
wiley   +1 more source

Statistical Characteristics of High‐Frequency Gravity Waves Observed by an Airglow Imager at Andes Lidar Observatory

Earth and Space Science, 2022
The long‐term statistical characteristics of high‐frequency quasi‐monochromatic gravity waves are presented using multi‐year airglow images observed at Andes Lidar Observatory (ALO, 30.3°S, 70.7°W) in northern Chile.
Bing Cao, Alan Z. Liu
doaj   +1 more source

Observations of the SW Sextantis star DW Ursae Majoris with the Far Ultraviolet Spectroscopic Explorer

, 2003
We present an analysis of the first far-ultraviolet observations of the SW Sextantis-type cataclysmic variable DW Ursae Majoris, obtained in November 2001 with the Far Ultraviolet Spectroscopic Explorer.
Biro I. B., Casares J., Christian Knigge, Cynthia S. Froning, D. W. Hoard, Dhillon V. S., Dickinson R. J., Knox S. Long, Koester D., Norton A. J., Paula Szkody, Rosen S. R., Rosen S. R., Rutten R. G. M., Vogt N., Zhang E.   +15 more
core   +1 more source

Spatial sampling of the thermospheric vertical wind field at auroral latitudes [PDF]

, 2011
Results are presented from two nights of bistatic Doppler measurements of neutral thermospheric winds using Fabry!Perot spectrometers at Mawson and Davis stations in Antarctica.
Anderson, Aruliah, Aruliah, Aruliah, Biondi, Burnside, C. Anderson, Chun, Conde, Conde, Conde, Conde, Conde, Conde, Cooper, Greet, Greet, Guo, Hunsucker, Innis, Innis, Innis, Ishii, Ishii, Ishii, Jones, Kosch, M. Conde, M. J. Kosch, P. Dyson, Picone, Price, Rees, Rishbeth, Sipler, Smith, Smith, Smith, Smith, Spencer, Spencer, T. Davies, Wardill, Østgaard   +43 more
core   +1 more source

Rapid Reversal of Hemispheric Asymmetry in the Intensity of EIA Crests During the Geomagnetic Storm of 23 April 2023: A Unique Observation From GOLD

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract This study, using the peak electron density of Ionospheric F‐region from the Global‐scale Observations of the Limb and Disk reports, for the first time, a unique phenomenon: the rapid reversal of the intensity of the Equatorial Ionization Anomaly (EIA) crests between the hemispheres during the main phase of 23 April 2023, geomagnetic storm ...
K. Shimna, R. K. Archana, C. Vineeth, Gang Lu, T. K. Pant, M. S. M. Vijayan   +5 more
wiley   +1 more source

Long-lived meteor trails

Solar-Terrestrial Physics, 2019
The paper presents data on long-lived (~20–40 min) meteor trails. We describe a group of soliton-type meteor trails expanding at transonic speeds. Radio sounding data evidences that the latter include ~7–8 min ionization trails.
Mikhalev A.V., Beletsky A.B., Vasilyev R.V., Eselevich M.V., Ivanov K.I., Komarova E.S., Podlesnyi A.V., Podlesny S.V., Syrenova T.E.   +8 more
doaj   +1 more source

Multi‐Source Perturbations in the Evolution of a Low‐Latitudinal Equatorial Plasma Bubble Event Occurred Over China

Space Weather, 2023
In this paper, multi‐source perturbations during the evolution of an equatorial plasma bubble (EPB) event at low latitudes in China are studied by means of multi‐ground‐based instruments, including an all‐sky airglow imager, a very high frequency (VHF ...
Longchang Sun, Jiyao Xu, Yajun Zhu, Wei Yuan, Hong Gao, Chunxiao Yan   +5 more
doaj   +1 more source