NASA has been involved with this international mission since 1995.
NASA contributed three instruments (ALICE, MIRO, and IES) to Rosetta, and part of the electronics package for the Double Focusing Mass Spectrometer, one of two detectors on the Swiss ROSINA instrument. NASA is also providing science investigators for selected non-U.S. instruments. In all, NASA is involved to a greater or lesser degree in ALICE, MIRO, IES, OSIRIS, Radio Science, ROSINA, and VIRTIS experiments. NASA's Deep Space Network provides support for ESA's Ground Station Network used in spacecraft tracking and navigation.