Results 31 to 40 of about 4,801 (223)

AURORA AND AIRGLOW [PDF]

open access: yesNature, 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

Airglow

open access: yesEos, Transactions American Geophysical Union, 1971
The past 4 years have seen the continuation of considerable activity in airglow research. Patterns of changing emphasis are becoming clear, observations are tending to become more selective, and changes in technique have led to regular observations of dayglow, line widths in the nightglow, and observations in the middle and far ultraviolet, detection ...
openaire   +1 more source

Daily Variability in the Terrestrial UV Airglow

open access: yesAtmosphere, 2020
New capability for observing conditions in the upper atmosphere comes with the implementation of global ultraviolet (UV) imaging from geosynchronous orbit. Observed by the NASA GOLD mission, the emissions of atomic oxygen (OI) and molecular nitrogen (N2)
Thomas J. Immel   +6 more
doaj   +1 more source

Low latitude airglow

open access: yes, 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 ...
Kulkarni, P. V., P. V. Kulkarni
core   +1 more source

Scientific goals of optical instruments of the National Heliogeophysical Complex

open access: yesSolar-Terrestrial Physics, 2020
Studies of the upper atmosphere have to be performed using optical photometric and spectrometric means. Modern devices allow precise photometry of the glow of the night atmosphere — airglow — with high temporal spatial and spectral resolution.
Vasilyev R.V.   +11 more
doaj   +1 more source

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

Application of tomographic inversion in studying airglow in the mesopause region [PDF]

open access: yesAnnales Geophysicae, 1998
It is pointed out that observations of periodic nightglow structures give excellent information on atmospheric gravity waves in the mesosphere and lower thermosphere.
T. Nygrén   +3 more
doaj   +1 more source

Seasonal and Diurnal Variability of Thermospheric Metastable Helium Observed by Multi‐Platform Observations and Numerical Modeling

open access: yesGeophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Metastable helium (He∗ ${\text{He}}^{\ast }$) in the thermosphere emits at 1,083 nm and provides a powerful diagnostic of thermospheric composition, solar radiation, and transport. Its detection remains challenging because of its extremely low density and high‐altitude.
Zhenwei Liu   +12 more
wiley   +1 more source

Unusual Enhancement in He(23S) Airglow Brightness Associated With Interplanetary Magnetic Field Northward Turnings During the 2025 New Year's Day Storm

open access: yesGeophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract The upper thermosphere is important in the context of space weather, but continuous monitoring of the thermosphere at high latitudes remains limited despite its strong variations associated with geomagnetic activity. Orthohelium, He(23S), is found from the upper thermosphere to lower exosphere, and is a promising tracer of atmospheric dynamics.
Takanori Nishiyama   +6 more
wiley   +1 more source

Variability of the Brunt–Väisälä frequency at the OH∗-airglow layer height at low and midlatitudes [PDF]

open access: yesAtmospheric 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
doaj   +1 more source

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