Joint Ulysses and ACE observations of a magnetic cloud and the associated solar energetic particle event

On day 49 of 1999 a strong interplanetary shock was observed by the ACE spa cecraft located at 1 AU from the Sun. This shock was followed 10 hours late r by a magnetic cloud (MC). A large solar energetic particle (SEP) event wa s observed in association with the arrival of the shock and the MC at ACE. The Ulysses spacecraft, located at 22 degrees S heliolatitude and nearly th e same ecliptic longitude as ACE, observed a large SEP event beginning on d ay 54 that peaked with the arrival of a solar wind and magnetic field distu rbance on day 61. A magnetic cloud was observed by Ulysses on days 63-64. W e suggest a scenario in which both spacecraft intercepted the same MC, alth ough sampling different regions of it. We describe the effects that the MC produced on the streaming of energetic particles at both spacecraft.