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Coronal velocity measurements with Ulysses: multi-link correlation studies during two superior conjunctions

Pätzold, M.; Plettemeier, D.; Janardhan, P. +5 more

A well-known method for studying the solar wind very close to the Sun (heliocentric distances: 4 to 40 solar radii) is by radio sounding between a spacecraft at superior conjunction and the Earth. The Ulysses Solar Corona Experiment was performed at the spacecraft's two solar conjunctions in summer 1991 and winter 1995, during which dual-frequency…