The gravity fields of Jupiter and Saturn as determined by Juno and Cassini

This Doctoral Thesis reports on the analysis procedure for the data acquired by Juno and Cassini in the last year with the aim of determining, respectively, Jupiter and Saturn’s gravity fields. The radio science investigation exploits the Doppler shift of a microwave signal to precisely determine the Earth-Spacecraft radial velocity and to estimate the gravity field harmonic coefficients, along with other dynamical parameters. The basic concepts of Doppler data and orbit determination are reported. A discussion on the esti- mated gravity fields is presented, as well as the implications for the interior structure of the Solar System’s gas giants.