Physics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84....1h&link_type=abstract
Journal of Geophysical Research, vol. 84, Jan. 1, 1979, p. 1-9.
Physics
4
Atmospheric Composition, Atmospheric Models, Atmospheric Temperature, Mass Spectroscopy, Satellite Observation, Thermosphere, Data Bases, Diurnal Variations, Exosphere, Gas Spectroscopy, Geomagnetism, Incoherent Scattering, Oxygen Atoms, Synoptic Measurement, Time Dependence, Universal Time
Scientific paper
Measurements of N2, O, He, and Ar densities from neutral gas mass spectrometers on four satellites and inferred O2 and H densities from an ion mass spectrometer have been combined to produce a model of longitude/UT variations in thermospheric neutral composition and temperature. The longitude/UT model is an extension of the mass spectrometer-incoherent scatter thermospheric model (Hedin et al., 1977) and uses spherical harmonic terms dependent on geographic latitude, longitude, and UT. The combined longitude and UT variations reflect the influence of the geomagnetic field but indicate that the variations may not simply be represented in magnetic coordinates.
Brinton Henry C.
Hedin Alan E.
Kayser David C.
Reber Carl A.
Spencer Nelson W.
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