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Beating The Ever-Growing Odds, Voyager 1 Phones Home From 24.9 Billion Kilometers Away

November 28, 2024 by Deborah Bloomfield

NASA’s aging Voyager 1 spacecraft has resumed regular operations, sending useful science data back home from about 24.9 billion kilometers (15.4 billion miles) away.

The Voyager probes, launched in 1977, have performed spectacularly well over nearly half a century, flying past various planetary bodies and studying them on their way to the outer reaches of the Solar System. But time, and a diminishing supply of fuel, have taken their toll on the spacecrafts in recent years, forcing NASA to shut down scientific instruments in order to keep them running.

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Several glitches have taken place over the last year too, with Voyager 1 sending back nonsense for six months before NASA was able to sort the issue. In the latest error to hit the probe, on October 19 it stopped sending signals back to Earth at all. 



However, the impressive spacecraft’s onboard computer was able to solve the situation by switching to using a transmitter that had not been used since 1981.

“The flight team suspected that Voyager 1’s fault protection system was triggered twice more and that it turned off the X-band transmitter and switched to a second radio transmitter called the S-band,” NASA’s Tony Greicius explained in the Voyager Blog soon after the transmitter was confirmed to be working.

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“While the S-band uses less power, Voyager 1 had not used it to communicate with Earth since 1981. It uses a different frequency than the X-band transmitters signal is significantly fainter. The flight team was not certain the S-band could be detected at Earth due to the spacecraft’s distance, but engineers with the Deep Space Network were able to find it.”

Though the transmitter was working, Voyager was still not fully operational. But in an update, NASA has confirmed that they were able to reactivate the X-band transmitter, and the spacecraft resumed collecting data with its four remaining powered-up science instruments in the week of November 18. The team is now attempting to return the spacecraft to the condition it was in before the error arose, including doing a reset of the system that synchronizes Voyager 1’s onboard computers.

With a little luck, there’s a few more years of life in the old dog yet.

Deborah Bloomfield
Deborah Bloomfield

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Source Link: Beating The Ever-Growing Odds, Voyager 1 Phones Home From 24.9 Billion Kilometers Away

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