Computer Science
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...72..359m&link_type=abstract
Space Science Reviews, Volume 72, Issue 1-2, pp. 359-364
Computer Science
3
Scientific paper
The intense solar activity centered in March and June 1991 produced some of the largest interplanetary disturbances over the past several solar cycles. For these events the Ulysses EPAC energetic particle observations near 3 AU are compared with those of the Voyager 2 CRS experiment near 35 AU. At Voyager 2 there is a single long-lived event extending over a period of some 6 months while the Ulysses data shows the imprint of individual events as well as the formative stages of the longer lived structure. The average intensity gradient is ˜ -17% AU between the 2 spacecraft. At both locations the energy spectra can be represented by an exponential in momentum. The characteristic momentum for protons, (Po)H is on the average 4 5 times larger at 35 AU than at 3 AU and there is a significant change in the (Po)He/(Po)H ratio. However the average H to He ratio is in the range 20 25 for both sets of measurements.
Keppler Erhard
McDonald Frank B.
Reuss M. K.
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