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Home / Science / The spacecraft carrying the persistence switches to “safe mode” after the failure, but NASA says it is not worried

The spacecraft carrying the persistence switches to “safe mode” after the failure, but NASA says it is not worried



The beginning of the Mars 2020 mission, with the ship's perseverance at the helm.

Mars 2020 mission launch, with a perseverance rover on board.
View: NASA / Joel Kowski

True, in this grueling year, 2020, NASA’s persistence Mars was launched yesterday Rover was not without problems.

As planned, the ULA Atlas V missile carrying Perseverance roveris and Ingenuity helicopter raised from Cape Canaveral Air Force Sterm in Florida yesterday morning. In space, the Mars 2020 mission is now expected to reach the Red Planet in 2021. February.

Everything looked like a picture perfect, but NASA said a couple of lustful things happened during the launch, none of which should jeopardize the mission.

When Atlas V turned toward space, telemetry signals sent to terrestrial antennas failed to receive incoming data. The spacecraft was apparently too close to NASA’s deep space network, a system of terrestrial antennas to communicate with deep space, causing signal saturation on ground receivers that prevented proper reception of telemetry data, NASA says.

“This is a known problem we have faced in other planetary missions, including the 2011 Opening NASA’s Curiosity Rover, NASA explained Matt Wallace, NASA’s Deputy Mars 2020 Mission Project Manager. statement. “The perseverance team worked on developing mitigation strategies that included moving the receivers and directing the antennas slightly away from the lens away from the spacecraft to keep the signal within acceptable range. After these steps, we wait for telemetry. ”

Okay, that’s not a big deal, but the second issue, while not serious, is still work to be done: The spacecraft is currently operating in safe mode after a temperature anomaly.

The system uses a liquid freon loop in which heat is transferred from the core of the spacecraft to the radiators during the cruise stage – the part of the vehicle that transfers the rover to Mars. SizDue to the proper temperature difference between the warm radiator inlet and the cooler outlet from the radiators, the precautionary software mode was activated.

“As the spacecraft entered the shadow of the earth, the Sun was temporarily blocked by the earth and the exit temperature dropped,” Wallace said. “This has widened the gap between the heater and cooler outlets. This short-lived differential triggered the alarm and caused the spacecraft to enter a standby mode called “safe mode.” “

Calling it a “short-term event,” Wallace said turning on safe mode “is not a Mars 2020 problem at this time.”

NASA says it has the problem, and mission controllers are now taking the necessary steps to move the spacecraft to normal cruise mode.

Phew. Glad that these are minor issues. The main failure of the Mars 2020 mission is exactly what we do not need now.


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