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  • SpaceX and NASA are teaming up again to launch their 22d Commercial Resupply Services mission to the ISS...

  • but this time, they're bringing along tools to give it a makeover!

  • Onboard the Dragon cargo capsule is a massive solar array system that's set to transform the power capabilities of Earth's only international orbiting outpost.

  • And in the process, it just may bring us one step closer to developing a viable power system for deep space missions.

  • This new power is going to help not only extend the existing life support systems that are out there, but just enable new

  • stations and modules to come in and kind of extend the life of the station in general for everything.

  • So, how does one get power 350 kilometers above Earth anyway?

  • Well, right now, the ISS has four pairs of solar arrays that convert sunlight into electricity.

  • Together, they cover more than half the area of a football field and generate 160 kilowatts of power during the day,

  • half of which they store in the station's batteries for when the ISS isn't in sunlight.

  • The first pair was deployed in 2000, with the rest following suit over the next couple of years.

  • And while the arrays are still working okay, they were only designed to have a 15-year service life...and as a result, aren't as efficient as they used to be.

  • In fact, they're lagging at just 14-something percent. So yeah, it's time for an upgrade!

  • Known as the International Space Station Roll-Out Solar Array, or iROSA, these lightweight and flexible solar arrays were designed by Redwire

  • in partnership with Boeing to become the station's next generation power system.

  • Using multijunction solar cells, these arrays run at more than 30% efficiency and are about half the length of the legacy arrays.

  • So ROSA is a new, innovative flex blanket solar array technology that utilizes these tiny slit tube booms.

  • And so that's pretty unique. It allows us to keep the design a lot simpler, a lot less parts, lower complexity.

  • And it's really scalable.

  • On their own, each new solar array produces more than 28 kilowatts of power.

  • But the plan is to send up six new arrayswhich when combined with the existing ones, will supply the ISS with up to 215 kilowatts.

  • The best part? This modular design makes it super easy for the arrays to be packed in and out of a cargo capsule.

  • The arrays use high-tech composite booms to roll out a solar cellblanket,” just like a party horn unfurls.

  • A famous video, or at least famous for us, of the original ISS arrays deploying,

  • where they were kind of sticking as they were deploying.

  • It's a little scary to watch. Part of the array actually ripped and they had to go out and repair it.

  • So, when we developed ROSA, we eliminated a lot of those problems with power rolling the array.

  • After years of development, iROSA is finally ready to be installed on the ISS.

  • Earlier this year, NASA astronauts Kate Rubins and Victor Glover, as well as JAXA astronaut Soichi Noguchi, prepared the solar array site with a modification kit.

  • This means that the site is all ready to go for when the first two iROSA wings arrive in early June onboard SpaceX's Falcon 9 rocket.

  • We'll be there for about two weeks or so. And then the crew will come out on a spacewalk.

  • And then the fun part begins where they translate this big solar array, you know, all the way out on the truc structure.

  • They'll kind of slide it into place and we kind of snap it in with some pins. And then there's a handful of bolts that they'll install that will rigidly secure it down.

  • And then they'll unfold the arrays, release a couple other bolts and the whole thing unfolds.

  • With ROSA, there's no motors or anything like that.

  • As soon as the tie downs are released, it's going to start rolling out all on its own.

  • If all goes well, the remaining four iROSA arrays will be sent up next year.

  • But the iROSA arrays aren't heading up to the ISS alonethey'll be joined by a whole cast of interesting cargo companions.

  • A team from the University of Wyoming will be sending up tardigrades to see how they respond to the stress of living in space,

  • while another team from the University of Wisconsin will be volunteering some cotton plants to study how microgravity affects their growth.

  • After all, one of the main goals of the ISS is to support scientific exploration!

  • Thankfully, the iROSA arrays will be there to make sure the lights stay on for many more experiments in the future.

  • I think the ISS is one of humanity's greatest achievements is having this massive floating lab in space.

  • It's really opening the doors for a lot of new innovative technologies and innovations.

  • But that's just the start for these solar arrays.

  • In just a few months, Redwire will be supplying two arrays for NASA's DART mission.

  • You know, the one that's colliding a craft into the double asteroid Didymos.

  • Check out our video on that here! Make sure to subscribe to Seeker for more rocket launch news and as always, thanks for watching.

  • I'll see you next time!!

SpaceX and NASA are teaming up again to launch their 22d Commercial Resupply Services mission to the ISS...

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