The Composite Infrared Spectrometer (CIRS) is a major science instrument aboard NASA's Cassini mission to Saturn. It measures the infrared energy from Saturn, its rings and its moons, especially Titan, in order to study their thermal structure and composition.
CIRS was built and is managed at NASA's Goddard Space Flight Center. As part of a joint mission between NASA and the European Space Agency, significant hardware contributions were made by Oxford University in England and the Meudon Observatory in France.
