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The behavior of the electron density and temperature 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
19900033679
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Richards, P. G.
(Alabama Univ. Huntsville, AL, United States)
Torr, D. G.
(Alabama, University Huntsville, United States)
Buonsanto, M. J.
(Haystack Observatory Westford, MA, United States)
Miller, K. L.
(Utah State University Logan, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
90A20734
Funding Number(s)
CONTRACT_GRANT: NSF ATM-87-16036
CONTRACT_GRANT: NSF ATM-87-13693
CONTRACT_GRANT: NSF ATM-87-14461
CONTRACT_GRANT: NSF ATM-87-15367
CONTRACT_GRANT: NSF ATM-88-08137
CONTRACT_GRANT: NAGW-922
CONTRACT_GRANT: NAGW-996
Distribution Limits
Public
Copyright
Other

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