Dropping power levels threaten InSight mission | WHAT REALLY HAPPENED

Dropping power levels threaten InSight mission

Dust accumulation on the solar panels of NASA’s InSight Mars lander is reducing the power to the spacecraft and could force the mission to end within a year.

At a June 21 meeting of NASA’s Mars Exploration Program Analysis Group, Bruce Banerdt, principal investigator for the InSight mission at NASA’s Jet Propulsion Laboratory, said dust accumulating on the lander’s two solar panels has drastically reduced the amount of power they produce, requiring some instruments to be turned off at least temporarily.

“The dust accumulation on the solar arrays has been considerable. We have about 80% obscuration of the arrays,” he said. The amount of energy available to the lander per Martian day, or sol, has dropped from nearly 5,000 watt-hours shortly after its November 2018 landing to less than 700 watt-hours now, according to data Banerdt presented at the meeting.

The decline in energy was expected, and the mission was designed to have enough power for its prime mission, which lasted one Martian year or 687 days. The continued decline in power, though, is becoming an issue as InSight operates in an extended mission funded through the end of 2022 to collect additional seismic data.