Other
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..383...13b&link_type=abstract
Workshop on the Earth's trapped particle environment. AIP Conference Proceedings, Volume 383, pp. 13-18 (1996).
Other
6
Energetic Trapped Particles, Magnetosphere Interactions
Scientific paper
We examine Los Alamos energetic electron data from 1979 through the present to show long term trends in the trapped relativistic electron populations at geosynchronous-earth-orbit (GEO). Data is examined from several CPA and SOPA instruments to cover the interval from 1979 through June, 1994. It is shown that the higher energy electrons fluxes (E>300 keV) displayed a cycle of ~=11 years. In agreement with other investigators, we also show that the relativistic electron cycle is out of phase with the sunspot cycle. We compare the occurrences of relativistic electrons and solar wind high speed streams and determine that on the time scale of 15 years the two do not correlate well. The long-term data set we provide here shows a systematic change of the electron energy spectrum during the course of the solar cycle. This information should be useful to magnetospheric scientists, model designers and space flight planners.
Belian Richard D.
Cayton Thomas E.
Christensen Rod A.
Ingraham J. C.
Lazarus Andrew J.
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