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There has never been a radio silence like this. After long months with no way of making contact with Voyager 2, NASA has finally re-established communications with the record-breaking interstellar probe.
The communications disruption – which lasted since March, nearly eight months and an entire pandemic ago – was not due to some rogue malfunction, nor to an encounter with interstellar space oddities (though there is that too).
In this case, it was more of a routine maintenance. Yet when you are one of the most distant spaceships in history, leaving the Earth and even the entire solar system behind, nothing is ever truly routine.
In March, NASA announced that Deep Space Station 43 (DSS-43) in Australia, the only antenna on Earth capable of sending commands to Voyager 2, needed critical updates and would have to shut down for about 11 months to complete. the job. .
During this window, Voyager 2, which is currently over 18.7 billion kilometers (11.6 billion miles) from Earth and further and further away, would not be able to receive any communication from Earth, although its own transmissions to we would still have it received by scientists.
At present, the refurbishment of the DSS-43 is still ongoing and is expected to be finalized in February 2021, but a sufficient number of updates have been installed to start preliminary tests.
Last week, mission operators sent their first communications to Voyager 2 since March, issuing a series of commands, and NASA reports that Voyager 2 returned a signal confirming that it received the instructions and executed the commands without any problems.
Over the past 8 months, Deep Space Station 43 has undergone updates. @ NASAVoyager-2 was waiting for us to send the commands again. On Friday, October 30th, we sent those commands and after a round trip of 34 hours and 48 minutes, a “hi” returned! # DSS43 @CSIRO pic.twitter.com/qyMEc9JkxcNovember 2, 2020
Successful pings between radio antennas and spacecraft are not usually noteworthy events, but Voyager 2 is such a legendary and historic probe (NASA’s longest-running space mission in fact), that it rightfully receives special attention , especially in situations like this, which involves such a long period of one-way radio silence, is actually unprecedented.
According to NASA, the DSS-43 hasn’t been offline for that long in over 30 years. The old radio antenna that needed to be replaced – the only one in the world capable of transmitting on Voyager 2 – had been in use for over 47 years.
As part of the refurbishment, DSS-43 is getting two new antennas, upgraded heating and cooling equipment, power supply equipment, and other electronic devices to support the new transmitters. When the work is complete, the updates will provide longevity to a cornerstone of an already legendary structure.
“What makes this task unique is that we are working at all levels of the antenna, from the pedestal at ground level to the feedcones in the center of the dish that extend above the edge,” says NASA Deep Space Project Manager. Brad Arnold network.
“This test communication with Voyager 2 definitely tells us that things are in line with the work we are doing.”
As for why the DSS-43 is the only platter in the world that can reach Voyager 2, the reason is not purely technological. As a result of the Neptune Triton moon probe overflight in 1989, the trajectory of Voyager 2 has significantly veered south from the plane of the Solar System’s planets, meaning terrestrial antennas in the Northern Hemisphere have no way of reaching it.
For Down Under antennas, however, that’s not a problem, unless you’re taken offline for nearly a year of critical updates. Even then, however, scientists never stopped thinking about Voyager 2 and kept an eye on its vital organs.
“We always talked to the spacecraft. We did it every day,” Suzanne Dodd, project manager for the Voyager Interstellar Mission, told CNN.
“We can see the health of it. If it weren’t healthy, we would have known.”
This article was originally published by ScienceAlert. Read the original article Here.
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