Table 6 Specifications and performance of the spectrometers

From: Mars Mineralogical Spectrometer (MMS) on the Tianwen-1 Mission

Parameters V-NIR N-MIR
Spectral range 0.4–1.1 μm 1.0–3.4 μm
Spectrometer magnification −0.845× −0.8125×
Objective normal aperture 0.143 0.143
Slit scale 12.8 mm × 31 μm 12.8 mm × 31 μm
Groove lines 150 g/mm 30 g/mm
Smile (design/measure) 4.26 μm/15.85 μm 4.52 μm/25.00 μm
Keystone (design/measure) 12.88 μm/13.26 μm 5.04 μm/5.75 μm