Jupiter's four large moons, Io, Europa, Ganymede, and Callisto, are orbiting synchronously, and are all known as Galilean satellites after Galileo Galilei, who discovered them in 1610. NASA's Galileo spacecraft, which reached the Jupiter system in 1995, has deepened our understanding of Galilean satellites in the past few years. In this paper, we use the new geodetic data (see Table 1) to construct a series of models for the internal structure of Galilean satellites, and to calculate their parameters of equilibrium shape and the tidal dissipation factors .