The behavior of the electron density and temperature at Millstone Hill during the equinox transition study September 1984

Details The behavior of the electron density and temperature at Millstone Hill during the equinox transition study September 1984 The behavior of the electron density and temperature at Millstone Hill during the equinox transition study September 1984

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9416969r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 16969-16975. Previously announced in STAR as N89-205

Physics

29

Equinoxes, Ionospheric Electron Density, Ionospheric Temperature, Magnetic Storms, Solar Activity, Atmospheric Density, Atmospheric Models, Neutral Atoms, Oxygen Atoms

Scientific paper

The ionospheric electron density and temperature variations is simulated during the equinox transition study in September 1984 and the results are compared with measurements made at Millstone Hill. The agreement between the modeled and measured electron density and temperature for the quiet day (18 September) is very good but there are large differences on the day of the storm (19 September). On the storm day, the measured electron density decreases by a factor of 1.7 over the previous day, while the model density actually increases slightly. The model failure is attributed to an inadequate increase in the ratio of atomic oxygen to molecular neutral densities in the MSIS neutral atmosphere model, for this particular storm. A factor of 3 to 5 increase in the molecular to atomic oxygen density ratio at 300 km is needed to explain the observed decrease in electron density. The effect of vibrationally excited N sub 2 on the electron density were studied and found to be small.

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