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The behavior of the electron density and temperatue at Millstone Hill during the equinox transition study September 1984The 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.
Document ID
19890011196
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Richards, P. G. (Alabama Univ. Huntsville., United States)
Torr, D. G. (Alabama Univ. Huntsville., United States)
Buonsanto, M. J. (Massachusetts Inst. of Tech. Westford., United States)
Miller, K. L. (Utah State Univ. Logan., United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Subject Category
Geophysics
Report/Patent Number
NAS 1.26:184737
NASA-CR-184737
Accession Number
89N20567
Funding Number(s)
CONTRACT_GRANT: NAGW-996
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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