[Of intense interest will be a Cassini determination of the periodicity in the appearance of spokes. This will require monitoring spoke activity from a variety of geometries over several years.] Cassini has found that the SKR period has changed since Voyager, which though hard to believe, may mean that the rotation of Saturn's interior has changed, ... That would be a finding of enormous consequence, so, we'll be looking very closely to see if the frequency of spoke activity has changed too. Carolyn Porco