Nadir and Occultation for Mars Discovery
Nadir and Occultation for MArs Discovery (NOMAD) is a 3-channel spectrometer on board the ExoMars Trace Gas Orbiter (TGO) launched to Mars orbit on 14 March 2016. NOMAD is designed to perform high-sensitivity orbital identification of atmospheric components, concentration and temperature, their sources, loss, and cycles.
Source: Wikipedia — Nadir and Occultation for Mars Discovery (CC BY-SA 4.0)