Results 91 to 100 of about 9,625 (210)

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

A rocket-borne airglow photometer [PDF]

The design of a rocket-borne photometer to measure the airglow emission of ionized molecular nitrogen in the 391.4 nm band is presented. This airglow is a well known and often observed phenomenon of auroras, where the principal source of ionization is ...
Paarmann, L. D., Smith, L. G.
core   +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

OHS: OH-airglow Suppressor for the Subaru Telescope [PDF]

, 2000
This paper describes an OH-airglow Suppressor (OHS) for the infrared Nasmyth focus of the Subaru telescope. OHS has the capability of eliminating 224 airglow-lines in the $J$- and $H$-bands, which are major sources of background radiation at near ...
Harashima, T., Hata, R., Iwamuro, F., Maihara, T., Motohara, K.   +4 more
core   +4 more sources

Low latitude airglow

Journal of Earth System Science, 1983
Tropical airglow work during the last few years is reviewed. Airglow instrumentation is becoming more complex. Some of these sophisticated airglow experiments giving important information about the upper atmosphere such as ionospheric F region electron density, height of maximum electron density, dynamics of and irregularities in the F region ...
openaire   +1 more source

Morphology of the Excited Hydroxyl in the Martian Atmosphere: A Model Study—Where to Search for Airglow on Mars?

Remote Sensing
Monitoring excited hydroxyl (OH*) airglow is broadly used for characterizing the state and dynamics of the terrestrial atmosphere. Recently, the existence of excited hydroxyl was confirmed using satellite observations in the Martian atmosphere.
Dmitry S. Shaposhnikov, Mykhaylo Grygalashvyly, Alexander S. Medvedev, Gerd Reinhold Sonnemann, Paul Hartogh   +4 more
doaj   +1 more source

Impact of lower atmospheric scattering on ground-based optical thermospheric wind observations with spatially uneven airglow [PDF]

Atmospheric Measurement Techniques
Scattered airglow emissions in the lower atmosphere can bias ground-based interferometer observations of thermospheric winds, particularly when airglow brightness becomes spatially uneven due to auroras. During two geomagnetic storms with visible auroras
X. Wei, X. Wei, X. Wei, G. Jiang, G. Jiang, G. Jiang, Y. Zhu, Y. Zhu, Y. Zhu, J. Xu, J. Xu, W. Liu, W. Liu, T. Wang, T. Wang, T. Wang, G. Zhu, G. Zhu, W. Yuan, W. Yuan   +19 more
doaj   +1 more source

Resolving thermospheric vertical wind ambiguities and energy processes

Frontiers in Astronomy and Space Sciences
This study applies a generalized vertical coordinate system approach alongside thermodynamic control volume analysis to explore the nuanced interpretations of energy transfer processes associated with vertical motion in the thermosphere.
Jeffrey P. Thayer, Jeffrey P. Thayer, Austin Coleman   +2 more
doaj   +1 more source

Nightside Detection of a Large‐Scale Thermospheric Wave Generated by a Solar Eclipse

Geophysical Research Letters, 2018
The generation of a large‐scale wave in the upper atmosphere caused by a solar eclipse was first predicted in the 1970s, but the experimental evidence remains sparse and comprises mostly indirect observations. This study presents observations of the wind
B. J. Harding, D. P. Drob, R. A. Buriti, J. J. Makela   +3 more
doaj   +1 more source

Production of N2 Vegard-Kaplan and Lyman-Birge-Hopfield emissions on Pluto

, 2014
We have developed a model to calculate the emission intensities of various vibrational transitions of N$_2$ triplet band and Lyman-Birge-Hopfield (LBH) band emissions in the dayglow of Pluto for solar minimum, moderate, and maximum conditions.
Bhardwaj, Anil, Jain, Sonal Kumar
core   +1 more source