The Imaging Ultraviolet Spectrograph (IUVS) is part of the MAVEN spacecraft, and measures global characteristics of the upper atmosphere and ionosphere via remote sensing. Its main goal is to provide global-scale measurements of major molecules, atoms, ions and isotopes in the Mars atmosphere & corona, while deriving key properties such as exobase and ionosphere altitudes. IUVS also provides major constraints on escape processes and measures the lower atmosphere. IUVS takes heritage from the The UltraViolet Imaging Spectrograph (UVIS) instrument on the Cassini mission.
Remote Sensing: Ultraviolet