Results 31 to 40 of about 14,994 (266)
Global imaging of polar cap patches with dual airglow imagers
Geophysical Research Letters, 2014 K. Hosokawa +5 more
exaly +2 more sources
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
doaj +1 more source
Skycorr: A general tool for spectroscopic sky subtraction [PDF]
, 2014 Airglow emission lines, which dominate the optical-to-near-IR sky radiation, show strong, line-dependent variability on various time scales. Therefore, the subtraction of the sky background in the affected wavelength regime becomes a problem if plain sky
Barden, M. +7 more
core +2 more sources
Atmospheric Chemistry and Physics, 2019 . Based on the zero-dimensional box model Module Efficiently Calculating the Chemistry of the Atmosphere/Chemistry As A Box model Application (CAABA/MECCA-3.72f), an OH airglow model was developed to derive night-time number densities of atomic oxygen ...
T. Fytterer +3 more
semanticscholar +1 more source
Optical Night-Sky Brightness at Mauna Kea over the Course of a Complete Sunspot Cycle [PDF]
, 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
Automatic Extraction of Gravity Waves from All-Sky Airglow Image Based on Machine Learning
Remote Sensing, 2019 With the development of ground-based all-sky airglow imager (ASAI) technology, a large amount of airglow image data needs to be processed for studying atmospheric gravity waves. We developed a program to automatically extract gravity wave patterns in the
Chang Lai +6 more
semanticscholar +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
doaj +1 more source
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
doaj +1 more source
On the Origin of Near-Infrared Extragalactic Background Light Anisotropy [PDF]
, 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
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
doaj +1 more source