Physics – Optics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apopt..18.3390p&link_type=abstract
Applied Optics, vol. 18, Oct. 15, 1979, p. 3390-3393. NASA-supported research
Physics
Optics
12
Airglow, Atmospheric Optics, Emission Spectra, Hydroxyl Emission, Light Emission, Atmospheric Tides, Gravity Waves, Infrared Photography, Lunar Tides, Nitric Oxide
Scientific paper
During IR photographic airglow observations covering several years, three naked-eye events have been recorded. Two of these are moving luminous acoustic-gravity-wave groups of some 10-15-km wavelength, which occur near high lunar tide in the atmosphere. The events appear quickly, endure 0.5-1 h, then fade. Visible photos of two events appear enhanced, while little enhancement is present in the IR photos, although the structures are well correlated. If these events are due to OH, it is suggested that some unrecognized mechanism, perhaps a gravity wave interaction, enhances the visible transitions of the OH over the IR transitions. If the events are due to an unrecognized continuum emitter, perhaps NO, its emission must occur at the same height as the OH. Spectra seem to be the only reasonable approach to solving this problem.
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