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The rising phase of solar cycle 23 as seen by Ulysses

Marsden, R. G.

Following its highly successful survey of the latitudinal structure of the heliosphere under near-minimum solar activity conditions, the Ulysses space-probe embarked in 1998 on a second out-of-ecliptic orbit of the Sun. This second high-latitude survey will culminate near solar maximum, offering a unique opportunity to study the polar regions of t…