Atmospheric Chemistry Suite: MIR and NIR spectrometers
The MIR and NIR instrument models, with covers removed, during quality control checks at IKI, the Space Research Institute, Russian Academy of Sciences.
MIR and NIR are Echelle-spectrometers for middle and near-infrared bands respectively. Along with TIRVIM, a Fourier-spectrometer for the thermal infrared band, they form the Atmospheric Chemistry Suite (ACS).
ACS is one of four science instruments on the ExoMars 2016 Trace Gas Orbiter.