We report on measurements of the angular
size of Jovian radio sources measured by
the URAP instrument on the Ulysses
spacecraft. The angular size is found to
be substantially larger than the
geometric size of the source as seen
from Ulysses due to the scattering of the
radio waves by fluctuations in the
electron density along the path of the
radiation. The
angular size varies with wavelength as expected for
such scattering, and the magnitude of
the scattering is consistent with
estimates using a statistical theory.  
The magnitiude of the
scattering is found to vary
substantially for different radio
events, most likely due to changes in
the density and/or fluctuation level
along the path of the radiation.