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Hydrogen Balmer alpha intensity distributions and line profiles from multiple scattering theory using realistic geocoronal modelsThe H Balmer alpha nightglow is investigated by using Monte Carlo models of asymmetric geocoronal atomic hydrogen distributions as input to a radiative transfer model of solar Lyman-beta radiation in the thermosphere and atmosphere. It is shown that it is essential to include multiple scattering of Lyman-beta radiation in the interpretation of Balmer alpha airglow data. Observations of diurnal variation in the Balmer alpha airglow showing slightly greater intensities in the morning relative to evening are consistent with theory. No evidence is found for anything other than a single sinusoidal diurnal variation of exobase density. Dramatic changes in effective temperature derived from the observed Balmer alpha line profiles are expected on the basis of changing illumination conditions in the thermosphere and exosphere as different regions of the sky are scanned.
Document ID
19870060961
Document Type
Reprint (Version printed in journal)
Authors
Anderson, D. E., Jr. (Hulburt (E. O.) Center for Space Research Washington, DC, United States)
Meier, R. R. (U.S. Navy, E. O. Hulburt Center for Space Research, Washington DC, United States)
Hodges, R. R., Jr. (Hulburt (E. O.) Center for Space Research Washington, DC, United States)
Tinsley, B. A. (Texas, University Richardson, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1987
Publication Information
Publication: Journal of Geophysical Research
Volume: 92
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NGL-44-004-026
CONTRACT_GRANT: NSF ATM-84-04024
Distribution Limits
Public
Copyright
Other