Astronauts complete NASA spacewalk to prepare for International Space Station
During the walk, Hoshide and Pesquet installed a modification kit, or support bracket, to prepare the outside of the station for future Roll-Out Solar Array installation work.
In its spacewalk commentary, NASA said the astronauts had completed all their primary tasks for the day as well as “one get ahead task,” which was replacing a part in the station’s airlock.
The two astronauts worked on the inward port side of the station’s backbone truss structure called P4. This is close to the space station’s living space.
When new solar arrays are sent to the space station, the modification kit will allow astronauts on a future spacewalk to install the third new Roll-Out Solar Array (which arrive rolled up like carpet).
The solar array upgrades will help upgrade the station’s power channels.
Sunday’s spacewalk was the first conducted out of the orbiting laboratory’s Quest airlock by two international partner astronauts at the space station, according to NASA.
A 360-degree virtual reality camera filmed Hoshide and Pesquet during their spacewalk.
During the spacewalk, Hoshide was extravehicular crew member one, wearing the spacesuit with red stripes, and Pesquet was extravehicular crew member two in a white unmarked suit.
It was the fourth career spacewalk for Hoshide and the sixth spacewalk for Pesquet. It was the 244th spacewalk to help assemble, maintain and upgrade the station.
Upgrading solar power
While the current solar arrays on the space station are still functioning, they have been supplying power there for more than 20 years and are showing some signs of wear after long-term exposure to the space environment. The arrays were originally designed to last 15 years.
Erosion can be caused by thruster plumes, which come from both the station’s thrusters as well as the crew and cargo vehicles that come and go from the station, said Dana Weigel, deputy manager of the International Space Station Program.
“The other factor that affects our solar arrays is micrometeorite debris. The arrays are made of a lot of small power strings, and over time those power strings can degrade if they’re hit by debris,” she said.
“The exposed portion of the old arrays will still be generating power in parallel with the new arrays, but those new Iris arrays have solar cells on them that are more efficient than our original cells,” Weigel said.
“They have a higher energy density and together in combination may generate more power than what our original array, when it was new, did on its own.”
The new arrays will have a similar 15-year expected life span. However, since the degradation on the original arrays was expected to be worse, the team…
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