The 'EPAC' instrument on Ulysses is sensitive to relativistic cosmic r
ays when far from Jupiter and in the absence of energetic solar partic
les. Measurement of the latitude gradient of these particles, after co
rrection for time variations, has been made for the 1993-1994 south po
lar pass. The average magnitude of the gradient is about the same or s
maller than predicted by a model which includes full gradient drift. H
owever, the latitude dependence of the solar plasma output into interp
lanetary space (including fast-stream and magnetic turbulence effects)
seems to be important in determining the magnitude of modulation.