Survey of MeV proton anisotropies measured by Ulysses

The Anisotropy Telescopes (ATs) instrument, part of the COSPIN experiment o n board Ulysses, measures fluxes and anisotropies of protons in the MeV ran ge. We survey data from this instrument throughout the Ulysses mission, wit h particular emphasis on solar maximum, when large particle intensities wer e measured. The only significant fluxes detected by the ATs during solar mi nimum are those associated with corotating interaction regions. We focus on events characterised by very large first-order anisotropies, indicating be am-like streaming along the magnetic field lines, and also on times of unus ually low and constant anisotropies. We describe the parameters associated with these events and put forward possible physical explanations of the ext reme anisotropies observed.