Fig. 17 | Space Science Reviews

Fig. 17

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

Fig. 17

a) The thermal control setting of MMS during the heat balance test of the EQM in the simulation orbiter platform. MMS installed on the bottom plate of the orbiter by thermal installation, and three extra heat pipes connected to the radiation surface of the orbiter. b) Temperature of MMS in vacuum heat balance test with the orbiter in FM stage. The optical frame and N-MIR channel’s fore-optics heat up with the activation of cryocooler. The temperature rises from 242 K to 248 K during the 26 minutes period of nadir observation, and slowly returns to storage status as the cryocooler switch off or turn to low-power mode

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