Results 31 to 40 of about 3,254 (234)
Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network
Atmosphere, 2020 An algorithm has been developed to isolate the gravity waves (GWs) of different scales from airglow images. Based on the discrete wavelet transform, the images are decomposed and then reconstructed in a series of mutually orthogonal spaces, each of which
Chang Lai +6 more
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Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic [PDF]
, 2005 International audienceHigh-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial optical emissions identical to ...
F. T. Djuth +17 more
core +1 more source
The global O2 airglow field as seen by the MATS satellite: strong equatorial maximum and planetary wave influence [PDF]
Atmospheric Chemistry and PhysicsThe Mesospheric Airglow/Aerosol Tomography and Spectroscopy (MATS) satellite was launched in November 2022, carrying as its main instrument a limb-viewing telescope with six spectral channels designed to image atmospheric O2 airglow and noctilucent ...
B. Linder +3 more
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Analysis of 2D airglow imager data with respect to dynamics using machine learning [PDF]
Atmospheric Measurement Techniques, 2023 We demonstrate how machine learning can be easily applied to support the analysis of large quantities of excited hydroxyl (OH*) airglow imager data. We use a TCN (temporal convolutional network) classification algorithm to automatically pre-sort images ...
R. Sedlak +7 more
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Nature, 1970 Atmospheric Emissions Edited by Billy M. McCormac and Anders Omholt. (Proceedings of the NATO Advanced Study Institute held at the Agricultural College of Norway, As, Norway, July 29–August 9, 1968.) Pp. xi + 563. (Van Nostrand Reinhold: New York and London, November 1969.) 234s.
openaire +2 more sources
Studying a Long-Lasting Meteor Trail from Stereo Images and Radar Data
Atmosphere, 2021 Unique observation of a long-lasting meteor trail of about half an hour duration is described. The trail resulted from a burning meteor from the Leonid storm flux in the middle latitudes over eastern Siberia.
Roman V. Vasilyev +6 more
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Simulation of high energy tail of electron distribution function [PDF]
, 2004 P(論文)This report presents Monte Carlo simulations of the electron energy distribution for alow ionized plasma interacting with the F-region neutral gas.
Aso, Takehiko +4 more
core +1 more source
Space-Based Limb-Imaging Spectrometer for Atmospheric O2 Airglow Detection
AtmosphereThis paper presents a space-based limb-imaging spectrometer (LIS) for detecting atmospheric O2 airglow; it scans the atmosphere with a vertical range of 10–100 km and has a vertical resolution of 2 km. The LIS’s detection performance needs to be examined
Minjie Zhao +14 more
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Earth and Space Science, 2023 Equatorial plasma bubbles (EPBs) are regions of depleted plasma within the ionosphere that form during post‐sunset hours near the magnetic equator. EPBs tend to align with local geomagnetic field lines, extend hundreds of kilometers along geomagnetic ...
V. J. Adkins, S. L. England
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Variability of the Brunt–Väisälä frequency at the OH∗-airglow layer height at low and midlatitudes [PDF]
Atmospheric Measurement Techniques, 2020 Airglow spectrometers, as they are operated within the Network for the Detection of Mesospheric Change (NDMC; https://ndmc.dlr.de, last access: 1 November 2020), for example, allow the derivation of rotational temperatures which are equivalent to the ...
S. Wüst +5 more
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