Computer Science – Sound
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37..915c&link_type=abstract
(IAU, IUGG, URSI, IUPAP, COSPAR, and SCOSTEP, International Solar-Terrestrial Physics Symposium, 4th, Sao Paulo, Brazil, June 17
Computer Science
Sound
2
Atmospheric Density, Diurnal Variations, Ionospheric Sounding, Reference Atmospheres, Satellite Observation, Thermosphere, Atmospheric Models, Committee On Space Research, Exosphere, Ionospheric Composition, Turbulent Diffusion
Scientific paper
The COSPAR International Reference Atmosphere (CIRA) 1972 provides both a Mean International Reference Atmosphere of the thermosphere and also a parametric set of models for this region. These models are based on knowledge of the thermosphere as of mid-1971. The problem of the differences in the diurnal variation of atmospheric density scale height from satellite drag studies and temperature from incoherent radar scatter observations is probably due to different diurnal variations of density and temperature and not due to systematic discrepancies in the measurements. The answer to this question should be provided by data from the recent satellites ESRO4, AEROS and AE-C. The second major area of interest involves the absolute number densities and variation with time of day, latitude and season of the major and minor constituents of the thermosphere. Recent data obtained with mass spectrometers and optical instruments are reviewed in addition to the results of theoretical composition calculations which include turbulence and other transport effects. The new density, temperature, and composition results could lead to the development of a new generation of thermospheric models.
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