Physics – Optics
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37..927b&link_type=abstract
(IAU, IUGG, URSI, IUPAP, COSPAR, and SCOSTEP, International Solar-Terrestrial Physics Symposium, 4th, Sao Paulo, Brazil, June 17
Physics
Optics
Airglow, Atmospheric Optics, Optical Emission Spectroscopy, Thermosphere, Aerology, Atmospheric Chemistry, Atmospheric Composition, Atmospheric Temperature, Auroral Arcs, Earth Atmosphere, Earth Magnetosphere, Photoelectrons
Scientific paper
Optical studies of the thermosphere (above 120 km) are reviewed which have been conducted in the last three years to extract information on general properties of the atmosphere. Observational methods are described together with the emission mechanisms of the atomic lines in the airglow. Data are presented on photoelectron-induced emissions and magnetospheric phenomena such as stable auroral arcs and equatorial hydrogen emission. Mapping of the plasmasphere using the 304-A line of ionized helium is described along with observations of the dayside magnetospheric cusp. Results are discussed for optical measurements of the temperature of neutral components in the thermosphere, wind measurements, and the determination of electron density and the concentration of molecular oxygen. Tropical and equatorial emissions are described together with measurements of the hydrogen, neutral helium, and ionized magnesium constituents of the thermosphere.
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