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

Abstract The Mars Mineralogical Spectrometer (MMS) is a hyperspectral imager onboard the orbiter of Tianwen-1, China’s first exploration mission. MMS consists 4 subassemblies: an Optical Sensor Unit (OSU), Electronics (EU), Calibration (CU), and Thermal Control Accessories (TCA). With 0.5 mrad IFOV 416-sample cell array for nadir observation, can map spectral spatial information Martian surface through push-broom scanning, it transmit scientific data by mode or multispectral imaging combination. perform multi-sample at full resolution (0.379–1.076 μm with 2.73 nm/band, 1.033–3.425 7.5 both ranges 2.1 km/pixel 265 km). For wavelength region interest, mapping provides additional options, subset 72 bands that are binned to minimum pixel footprints m/pixel. major objective analyze compositions distributions minerals on surface, in order characterize its evolution.