Small Mars Mission Architecture Study

Table 5

Science payload suite and associated objectives for the Mars Science Orbiter.

Instrument		Heritage	FOV (°)	Spatial res. at 320 km altitude (m)	Science objective	Ref.
Thermal IR radiometer/Imaging spectrometer, imaging spectrometer, radiometer		MERTIS (BepiColombo)		<200 (imaging spectrometer), ≤2000 m (radiometer)	Surface composition, temperature, thermal inertia, rock abundance, atmospheric science	[26, 27]
Visible imaging system		CaSSIS (TGO)		3.2	High resolution colour imaging of the surface, change detection, stereo imaging, geological context	[28]
NIR spectrometer		MacrOmega (Mars Moon explorer) MicrOmega (Phobos-Grunt, Hayabusa-2, ExoMars 2022 rover),			Mineralogy	[29, 30]

The satellite also includes a data relay capability. An orbital version of MicrOmega would need a different optical design as it would be focussed at infinity and use solar illumination; specification of the FOV and spatial resolution would depend on instrument-level design trade-offs.