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Thermospheric hydrogen - The long-term solar influenceAtmospheric Explorer C and E satellite data are employed for a long-term analysis of the behavior of thermospheric hydrogen with respect to the 11 yr solar cycle. The data covered the period 1974-79 (increasing solar activity) and comprised in situ ionospheric (F region) and neutral atmospheric data. The data were analyzed statistically to characterize low latitude hydrogen behavior, e.g., the diurnal variation and mean concentration over the 5 yr data sampling period. Both the mean and daily maximum/minimum ratio (DMMR) varied with the solar F index. The escaping flux of H ions became a contant around 1000 K. Increasing thermospheric temperatures lowered the DMMR value. However, the DMMR values calculated were consistently large enough to require inclusion of neutral winds and/or diurnal variations in charge exchange fluxes moving in and out of the plasmasphere in any model for thermospheric hydrogen behavior.
Document ID
19850054015
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Breig, E. L.
(Texas Univ. at Dallas Richardson, TX, United States)
Sanatani, S.
(Texas Univ. at Dallas Richardson, TX, United States)
Hanson, W. B.
(Texas, University Richardson, TX, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A36166
Funding Number(s)
CONTRACT_GRANT: NSF ATM-83-12170
CONTRACT_GRANT: NGR-44-004-120
Distribution Limits
Public
Copyright
Other

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