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Calculated ionization rates, ion densities, and airglow emission rates due to precipitating electrons in the nightside ionosphere of MarsThe calculations presented in this paper clearly establish that the electron fluxes measured by the HARP instrument, carried on board Phobos 2, could cause significant electron impact ionization and excitation in the nightside atmosphere of Mars, if these electrons actually do precipitate. The calculated peak electron densities were found to be about a factor of 2 larger than the mean observed nightside densities, indicating that if a significant fraction of the measured electrons actually precipitate, they could be the dominant mechanism responsible for maintaining the nightside ionosphere. The calculated zenith column emission rates of the O I 5577-A and 6300-A and CO Cameron band emissions, due to electron impact and dissociative recombination mechanisms, were found to be significant.
Document ID
19920064840
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Haider, S. A.
(Banaras Hindu University Varanasi, India)
Kim, J.
(Michigan, University Ann Arbor; Korean Aerospace Research Institute, Taejon, Republic of Korea, United States)
Nagy, A. F.
(Michigan, University Ann Arbor, United States)
Keller, C. N.
(Kansas, University Lawrence, United States)
Verigin, M. I.
(NASA Headquarters Washington, DC United States)
Gringauz, K. I.
(NASA Headquarters Washington, DC United States)
Shutte, N. M.
(Rossiiskaia Akademiia Nauk Institut Kosmicheskikh Issledovanii, Moscow, Russia)
Szego, K.
(NASA Headquarters Washington, DC United States)
Kiraly, P.
(Hungarian Academy of Sciences Central Research Institute for Physics, Budapest, Hungary)
Date Acquired
August 15, 2013
Publication Date
July 1, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: A7 J
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
92A47464
Funding Number(s)
CONTRACT_GRANT: NAGW-2533
CONTRACT_GRANT: NAGW-631
CONTRACT_GRANT: NAG2-491
Distribution Limits
Public
Copyright
Other

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