CHACE-2 on Chandrayaan-2

CHACE-2 along with the power module (from Das et al, 2020, Current Science).

The CHandra’s Atmospheric Composition Explorer-2 (CHACE-2) experiment aboard Chandrayaan-2 orbiter was aimed to study in situ, the composition of the lunar neutral exosphere in the mass range 1–300 amu. CHACE-2 was on neutral gas mass spectrometer. CHACE-2 was sequel to CHACE on Chandrayaan-1 and MENCA on Mars Orbiter Mission. CHACE-2 observations will address the spatial and temporal variations of the lunar exosphere, and examine water vapour as well as heavier species in it. The observations have shown the first global distribution of Argon-40, which is an important noble gas, in the lunar exosphere.