The ALICE ultraviolet imaging spectrometer analyses gases in the coma and tail and measures the comet’s production rates of water and carbon monoxide/dioxide. Also provides information on the surface composition of the nucleus.
The orbiter's scientific payload includes 11 experiments, in addition to the Lander. Scientific consortia from institutes across Europe and the United States have provided these state-of-the-art instruments. All of them are located on the side of the spacecraft that will permanently face the comet during the main scientific phase of the mission.