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NASA’s Mars Reconnaissance Orbiter, in space now for fifteen years, will undergo a two week computer software upgrade.
The maintenance work involves updating battery parameters in the spacecraft’s flash memory – a rare step that’s been done only twice before in the orbiter’s 15 years of flight. This special update is necessary because it was recently determined that the battery parameters in flash were out of date and if used, would not charge MRO’s batteries to the desired levels.
In addition to the battery parameters, engineers will use this opportunity to update planetary position tables that also reside in flash. The spacecraft will go into a precautionary standby mode, called safe mode, three times over the course of the update. It will also swap from its primary computer, called its Side-A computer, to its redundant one, called Side-B.
During these two weeks the spacecraft will suspend its science and communications operations.