Density patterns induced by small moonlets in Saturn's rings?

An extension of the model of the gravitational scattering by moonlets in pl anetary rings to collisional diffusion is presented. The resulting typical propeller-shaped structures bear the chance to deduce the existence of larg er(> 100 meter) embedded bodies in planetary rings. Their spatial extension s provide estimates for the size of the embedded bodies and they contain in formation about the physical properties of the surrounding ring-material li ke the kinematic viscosity, mass-density, mean free path and collision freq uency. The induced structures lie in the range of the resolution of the Cas sini Imaging experiment, and thus, could be observed in near future.