Small Mars Mission Architecture Study

Table 6

Preliminary mass budget information for the Mars Science Orbiter mission.

		Mass (kg)
Attitude, orbit, guidance, navigation control		8.0
Chemical propulsion		41.4
Communications (UHF proximity link, DTE link: X-band, 50 W TWTA, 1 m HGA)		34.3
Instruments		34.2
Power (310 W @Mars)		74.5
Structures		63.4
Thermal control		9.8
Data handling (730 Gb science data volume)		5.3
Harness		13.5
Dry mass SC		284.4
System margin	30%	85.3
Dry Mass SC incl. system margin		369.7
CPROP fuel mass (1370 m/s ΔV)		124.8
CPROP fuel margin	2%	2.5
CPROP oxidizer mass		97.7
CPROP oxidizer margin	2%	2.0
CPROP pressurant mass		1.0
CPROP pressurant margin	2%	0.0
Total wet mass SC		597.7
Launcher interface		64
Launched mass		661.7