Results 21 to 30 of about 9,625 (210)

Simplified Relations for the Martian Night-Time OH* Suitable for the Interpretation of Observations

open access: yesRemote Sensing, 2022
Observations of excited hydroxyl (OH*) emissions are broadly used for inferring information about atmospheric dynamics and composition. We present several analytical approximations for characterizing the excited hydroxyl layer in the Martian atmosphere ...
Mykhaylo Grygalashvyly   +4 more
doaj   +1 more source

Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network

open access: yesAtmosphere, 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
doaj   +1 more source

On the Origin of Near-Infrared Extragalactic Background Light Anisotropy [PDF]

open access: yes, 2014
Extragalactic background light (EBL) anisotropy traces variations in the total production of photons over cosmic history, and may contain faint, extended components missed in galaxy point source surveys.
Arai, Toshiaki   +15 more
core   +4 more sources

Characterization of a Double Mesospheric Bore Over Europe [PDF]

open access: yes, 2017
Observations of a pair of mesospheric bore disturbances that propagated through the nighttime mesosphere over Europe are presented. The observations were made at the Padua Observatory, Asiago (45.9\ub0N, 11.5\ub0E), by the Boston University all-sky ...
Baumgardner, Jeffrey L.   +11 more
core   +1 more source

The global O2 airglow field as seen by the MATS satellite: strong equatorial maximum and planetary wave influence [PDF]

open access: yesAtmospheric Chemistry and Physics
The 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
doaj   +1 more source

Analysis of 2D airglow imager data with respect to dynamics using machine learning [PDF]

open access: yesAtmospheric 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
doaj   +1 more source

Optical Night-Sky Brightness at Mauna Kea over the Course of a Complete Sunspot Cycle [PDF]

open access: yes, 1997
We have produced a data base of V-band and B-band night-sky brightness measurements rather evenly spread out over the course of a whole sunspot cycle from September 1985 to August 1996.
Krisciunas, K.
core   +3 more sources

Spatial and Temporal Stability of Airglow Measured in the Meinel Band Window at 1191.3 nm [PDF]

open access: yes, 2015
We report on the temporal and spatial fluctuations in the atmospheric brightness in the narrow band between Meinel emission lines at 1191.3 nm using an R=320 near-infrared instrument.
Battle, John   +6 more
core   +2 more sources

The airglow layer emission altitude cannot be determined unambiguously from temperature comparison with lidars [PDF]

open access: yes, 2018
I investigate the nightly mean emission height and width of the OH*(3-1) layer by comparing nightly mean temperatures measured by the ground-based spectrometer GRIPS 9 and the Na lidar at ALOMAR.
Dunker, Tim
core   +2 more sources

Studying a Long-Lasting Meteor Trail from Stereo Images and Radar Data

open access: yesAtmosphere, 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
doaj   +1 more source

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