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Latitudinal variation of thermospheric hydrogen near solstice from AE-D observationsVariations of thermospheric neutral atomic hydrogen with latitude during a solstice season near solar minimum were investigated using data acquired with the polar-orbiting AE-D satellite. Hydrogen concentrations at low latitude were found to be comparable to those found from observations with the AE-E satellite, but were slightly higher than concentrations derived from the 1983 mass spectrometer incoherent scatter atmospheric model. Results confirm the general summer-to-winter density increase, large latitudinal gradients in the summer hemisphere, and the winter enhancement of hydrogen observed in AE-C nighttime measurements. The AE-D data, however, show a small polar depression in hydrogen concentration at high winter latitudes, attributed to atmospheric dynamics following auroral heating. The density gradients observed by AE-D in the summer hemisphere were in sharp contrast to the more constant horizontal daytime profiles reported from OGO-6 and previous AE-C measurements, indicating the possibility of local time effects.
Document ID
19880066232
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sanatani, S.
(Texas Univ. at Dallas Richardson, TX, United States)
Breig, E. L.
(Texas, University Richardson, United States)
Date Acquired
August 13, 2013
Publication Date
September 1, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
88A53459
Funding Number(s)
CONTRACT_GRANT: NGR-44-004-120
CONTRACT_GRANT: NSF ATM-85-02516
CONTRACT_GRANT: NSF ATM-86-13599
Distribution Limits
Public
Copyright
Other

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