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Detailed Reference Information
Hofer et al. 2002
Hofer, M.Y., Marsden, R.G., Sanderson, T.R. and Tranquille, C. (2002). Composition measurements above the Southern Solar Polar Region around the solar activity maximum by the Ulysses COSPIN/LET instrument. Geophysical Research Letters 29: doi: 10.1029/2002GL014944. issn: 0094-8276.

In November 2000, during the second southern polar passage (SPP), the Ulysses spacecraft reached its highest heliographic latitude (80.2¿) at a solar radial distance of ~2.27 AU. The first SPP in 1994 took place as the level of solar activity was approaching the minimum between the cycles 22 and 23. The recent high-latitude observations during the second SPP in 2000/2001 correspond to near-maximum activity conditions with a large number of transient phenomena. These heliospheric conditions are reflected in the energetic particle composition data covering the energy range 4--20 MeV/n recorded by the COSPIN/-LET instrument. Most of the particles observed at high heliographic latitudes had their origin in solar energetic particle events. Furthermore, the results suggest coronal mass ejection-driven shock acceleration of coronal material as the source.

BACKGROUND DATA FILES

Abstract

Keywords
Solar Physics, Astrophysics, and Astronomy, Energetic particles, Solar Physics, Astrophysics, and Astronomy, Corona, Space Plasma Physics, Shock waves
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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