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Observation of low energy particle precipitation at low altitude in the equatorial zonePrecipitation of protons in the equatorial zone was investigated by the Phoenix-1 experiment on the S81-1 mission from May to November, 1982. The protons show a precipitation peak along the line of minimum magnetic field strength with a FWHM of 13 deg. The index of equatorial pitch angle distribution is about 19. The peak proton flux shows a fifth-power altitude dependence, and the proton flux shows approximately a factor of 3 times increase in 1982 compared to that in 1969 due, possibly, to the stronger solar maximum conditions of 10.7-cm radiation in 1982.
Document ID
19900025060
Document Type
Reprint (Version printed in journal)
Authors
Miah, M. A. (Arkansas, University Pine Bluff, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Journal of Atmospheric and Terrestrial Physics
Volume: 51
ISSN: 0021-9169
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS2-24430
CONTRACT_GRANT: N00014-83-K-0365
Distribution Limits
Public
Copyright
Other