The electron density increased over time by a factor of three in the Voyager epoch (1979) to the Galileo epoch (1995) and became significantly higher (_ 5 times) in the Cassini epoch (2001) (Steffl et al., 2006).
The electron density increased over time by a factor of three in the Voyager epoch (1979) to the Galileo epoch (1995) and became significantly higher (_ 5 times) in the Cassini epoch (2001) (Steffl et al., 2006).