Results 101 to 110 of about 3,254 (234)

Heater‐induced ionization inferred from spectrometric airglow measurements

, 2014
Spectrographic airglow measurements were made during an ionospheric modification experiment at High Frequency Active Auroral Research Program on 12 March 2013. Artificial airglow enhancements at 427.8, 557.7, 630.0, 777.4, and 844.6 nm were observed.
Bernhardt, P. A., Pedersen, T. R., Hysell, D. L., E. A. Kendall, R. H. Varney, Kendall, E. A., Miceli, R. J., B. J. Watkins, D. L. Hysell, P. A. Bernhardt, N. M. Schlatter, Varney, R. H., Schlatter, Nicola Manuel,, T. R. Pedersen, Watkins, B. J., Huba, J. D., R. J. Miceli, J. D. Huba   +17 more
core   +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

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

Simultaneous measurements of high-frequency pump-enhanced airglow and ionospheric temperatures at auroral latitudes [PDF]

, 2000
P(論文)Simultaneous measurements of enhanced airglow at 6300 A and plasma temperatures from transmitting a powerful high frequency electromagnetic pump wave from the EISCAT-Heating facility into the ionospheric F region at auroral latitudes are reported ...
Brändström, B., Steen, AA., Steen, Å., Aso, Takehiko, Leyser, T. B., Aso, T., Honary, F., Rietveld, M. T., Ejiri, Masaki, Gustavsson, B., Ejiri, M., Leyser, T., Rietveld, M., Brändström, B. U. E.   +13 more
core   +1 more source

A Dual-Channel Passive Limb Imaging System (DUALIS) for Mars with UV Airglow-Based CO₂ Retrieval and 557.7 nm Doppler Wind Imaging Interferometry

Remote Sensing
Characterizing both the CO2 distribution and wind dynamics in the Martian mesosphere and lower thermosphere is vital for planetary atmospheric science and mission planning. In this work, we propose a novel dual-channel passive limb-viewing imaging system
Yanqiang Wang, Shun Zhou, Tingyu Yan, Shiping Guo, Zeyu Chen, Yifan He, Yao Lu   +6 more
doaj   +1 more source

Disentangling Stellar and Airglow Emission Lines from HST-COS Spectra

, 2023
H I Ly$\alpha$ (1215.67 \r{A}) and the O I triplet (1302.17, 1304.86, and 1306.03 \r{A}) are bright far-ultraviolet (FUV) emission lines that trace the stellar chromosphere.
France, Kevin, Bourrier, Vincent, Aguirre, Fernando Cruz, Youngblood, Allison   +3 more
core  

Airglow observations from ELOISE

, 2016
In August and September 2015, the Defence Science and Technology Group (DST Group) undertook the Elevation-scanned Oblique Incidence Sounder Experiment (ELOISE): a unique campaign to observe and characterise mid-latitude ionospheric disturbances across ...
Pederick, L., Cervera, M., Cool, A., Harris, T., Unewisse, A.   +4 more
core  

Spectroscopy of a mesospheric ghost reveals iron emissions. [PDF]

Nat Commun, 2023
Passas-Varo M, Van der Velde O, Gordillo-Vázquez FJ, Gómez-Martín JC, Sánchez J, Pérez-Invernón FJ, Sánchez-Ramírez R, García-Comas M, Montanyà J.   +8 more
europepmc   +1 more source

Airglow monitoring by one-pixel detector

, 2019
International audienceThe night time airglow is a dynamic phenomenon that acts as a background for the detection of the extensive air shower (EAS) fluorescence. It is a mandatory task to monitor this background for the ground-based telescopes and for the
Gorodetzky, P., Putiš, M., Mackovjak, Š., Baláž, J., Bobík, P., Strhárský, I.   +5 more
core   +1 more source