[Valdes-Galicia 1988 a]
Modulation cosmic rays in the GV range by a recurrent high speed stream in the
southern polar coronal hole
H. Kunow, W. Dröge, B. Heber, R. Müller-Mellin,
K. Röhrs, H. Sierks, G. Wibberenz, R. Ducros,
P. Ferrando and C. Rastoin.
Modulation cosmic rays in the GV range by a recurrent high speed stream in the
southern polar coronal hole.
Advances in Space Research 16, (9)351. 1995
Contents
The excursion of the ULYSSES spacecraft to higher latitudes is characterized
by the entry into the unipolar magnetic field region of the southern coronal
hole, accompanied by a solar wind structure different from low solar latitudes.
The resulting corotating interaction region has a pronounced influence on the
daily averaged counting rates of nuclei in the rigidity range of several GV.
During this part of the trajectory, intensities averaged over one solar
rotation increase continuously with time (apart from a plateau-like period).
To which extent this is due to latitudinal effects or to temporal and radial
variation will be discussed in an accompanying paper.
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