It studies studies Saturn itself, the magnetic field, weather, the moons, and the rings.
It has a lot of instruments on board:
- a radar mapper
- a CCD camera
- a visible/infrared mapping spectrometer
- a composite infrared spectrometer
- a cosmic dust analyzer
- a radio and plasma wave experiment
- a plasma spectrometer
- an ultraviolet imaging spectrograph
- a magnetospheric imaging instrument
- a magnetometer
- an ion/neutral mass spectrometer
It will also use the telemetry from the communications antenna and other special transmitters to observe the atmospheres of Titan and Saturn, and to measure the gravity fields of Saturn and its moons.