The Ion and Neutral Mass Spectrometer (INMS) is collecting data to determine the composition and structure of positive ions and neutral particles in the upper atmosphere of Titan and the magnetosphere of Saturn. It is also measuring the positive ion and neutral environments of Saturn's rings and icy moons.

The instrument is capable of determining the chemical, elemental and isotopic composition of the gaseous and volatile components of the neutral particles and the low energy ions in Titan's atmosphere and ionosphere, Saturn's magnetosphere, and the ring environment.

For more information, read the engineering technical write-up.

INMS on the Cassini Spacecraft	INMS Instrument	INMS Diagram

At a Glance

Mass (current best estimate) = 9.25 kg Average Operating Power (current best estimate) = 27.70 W Average Data Rate (current best estimate) = 1.50 kilobits/s