Geophys. Res. Lett., 24, 3101-3104, 1997
Abstract:
After passing through the northern polar regions of the heliosphere during
the summer of 1995, the Ulysses spacecraft has been gradually returning
towards lower equatorial latitudes, reaching 30°N in August 1996 at about
which time low speed solar wind from the streamer belt was once again
observed. This paper reports on the Ulysses magnetic field observations,
beginning from this time, concentrating on encounters with the heliospheric
current sheet. These encounters restarted at a latitude of 25.5°N, a higher
latitude than might be expected at solar activity minimum. We show that this
early reappearance was due to a northward deflection of the current sheet
caused by a long-lived active region at the corresponding heliographic
longitude in the photosphere.
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