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we're with uh expedition 65 flight

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engineer shane kimbrough of nasa aboard

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the international space station shane

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good day to you a big

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amount of work on the docket uh for you

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and tomah pesquet in the days ahead

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as you head out the quest airlock for a

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pair of spacewalks to begin upgrading

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and augmenting the station's power

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supply

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it they're called irosas iss roll up

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solar arrays give us a little preview of

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what these arrays are all about and what

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these space walks coming up are all

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yeah thanks rob taman and i are really

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looking forward to going outside of

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course there's a whole team of people

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here on board as well as on the ground

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that are going to take care of us and

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make sure we're doing the right thing

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these iroses as you mentioned the the

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new iss rollout solar arrays are pretty

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fantastic we got a chance to see them

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when we were at kennedy just before we

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launched a little over uh six weeks ago

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or so

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and it's pretty incredible to see the

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material they're made out of for one so

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they're this lightweight flexible

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composite blanket material

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that can get stowed very compactly but

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when it's rolled out and deployed it can

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bring in a lot of sunlight which in in

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our case will give us a lot of power on

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the space station

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we'll talk a little bit more about the

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arrays here in just a second you and

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tomah are in a very unique position

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you conducted a pair of spacewalks

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together back in 2017 to upgrade station

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batteries the power supply at that time

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and the replacement of batteries and

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also to

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set the stage for the installation

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of the docking port on the zenith or

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space-facing side of the harmony module

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so you and tomah really know each

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other's moves pretty well

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how

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uh

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important is all of that in creating the

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efficiencies you will need for these

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yeah that's a great point i was very

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fortunate to go out with tomah two other

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times like you mentioned and the

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choreography that you're that you're

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alluding to there is very important

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outside of course um this this one this

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these arose um evas are going to be very

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challenging very complex so we've got to

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make sure

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that we're both on the same page for

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every movement that we do

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whether that's to protect the solar

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arrays or to just protect the pallet

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that we're on or to connect you know one

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of the electrical connectors

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we've got to make sure we're step in

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step and make sure we know what we're

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doing

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and also make sure that we're tied into

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the ground so they know what we're doing

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so it's going to be

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a huge effort um jenny said he's going

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to be our capcom and our i mean our

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ground iv and she'll be you know leading

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us through the spacewalk so we're going

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to make sure we're in step with her as

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well so that we get these things

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installed and as long as the hardware

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behaves and get all the connections made

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we're going to have a lot a bigger new

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power source once we get done

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in all when it's all said and done there

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will be three pairs of these arrays six

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in all that will upgrade and augment six

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of the eight power channels on the

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station

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what

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arrays that are important to bringing

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the station back to its original power

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output capability for the rest of the

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well these solar rays are

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the density on them is very high which

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is you know just an upgrade so to speak

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just like all things even on earth as

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the years go by things get uh more

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efficient and smaller and and this is no

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exception to that because these arrays

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are much smaller than the original rays

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that we're going to go put these next to

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these arrays that we're going to put out

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there about 60 feet by 15 feet

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we're going to place them on the inboard

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side of an existing solar ray and of

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course they're not going to hit each

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other when they're going around so all

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that geometry has been worked out by the

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engineers

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but we're looking forward again to

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installing you know we're going to get a

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chance to do two of these arrays here

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in about a week and a half or so and

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looking forward to doing that to help

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the space station's power supply

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one social media question that we

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received asks how efficient are these

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new solar arrays and

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the temperature what temperature do they

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reach when they're exposed to direct

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yeah they're around 20 to 30 percent uh

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at least that's the boost we're gonna

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get on the space station when we get

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these installed and each one produces

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about 20 kilowatts of power and so once

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all six are installed we're gonna have

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about 120 kilowatts more of power for

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the space station so that's pretty

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amazing

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in itself

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and i forgot the last part of that

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question rob what was it

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uh it asks what temperature do they

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reach when they're exposed to direct

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yeah i assume they're going to reach the

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same temperature that everything outside

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does that's around 200 degrees c uh

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we're going to experience that same

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temperature in the spacesuits of course

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the spacesuits protect us

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but everything outside when the sun's

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out it's around 200 c

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now a larger version of these arrays are

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contemplated for the gateway program

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for deep space exploration application

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so how important not only for the

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current

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augmentation of power on the station but

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the future application to nasa's future

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space exploration efforts are these

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spacewalks that you and tomah will be

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well like i said we're the first two and

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there's gonna be several more of the

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next couple years to get all six

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installed and then that system you know

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hopefully it'll get proven uh before we

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take it to the lunar uh gateway uh which

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is where this you know similar design

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only bigger on the gateway but a similar

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irosa or excuse me a rosa

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will get installed on the gateway

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we're going to install them manually as

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you know and we're going to roll them

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out

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manually but the ones on the gateway

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will actually be automatic once they get

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onto orbit so a few differences there

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the the size for one and the way they're

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getting deployed but the same technology

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shane uh looking at the procedures

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timeline this is a tricky eva from a

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timing standpoint

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there's an eclipse issue that you have

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to be conscious of there's a certain

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inhibits that the ground controllers

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will be

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watching the clock very carefully as you

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and tomorrow go through your procedures

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if there's a pinch point something that

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concerns you the most about being able

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to execute the spacewalk what do you

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well there are a lot of complexities to

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this one like you mentioned um to me

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it's it's the hardware it's just if it

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behaves and this is on any spacewalk

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this is no different but this has got a

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few more complexities just due to the

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nature of what's going on

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um so as long as the hardware behaves

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you know it could be any bolt as we're

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taking the roses off the pallet if those

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don't work that's a problem right if

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we're installing it on the mounting

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brackets out on p6 if those don't go in

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then we have a problem so there's a

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bunch of little pinch points and i can't

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really nail down one that we're

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specifically concerned about uh maybe

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the ones during the eclipse i think

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definitely are on our radar so like you

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mentioned we have some actions during

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the eclipse where we hook up uh the

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power from these new solar arrays to the

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panels of the old solar rays and those

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it's not tricky we hope but again if we

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have some complications there due to the

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connectors or whatever then that's going

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to be a big deal and then if we can't

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get it done during the eclipse we'll

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have to wait till the next eclipse so

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another 45 or 15 minutes later so the

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timing like you mentioned is going to be

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very tricky

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and a final question shane uh these will

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be the seventh and eighth spacewalks of

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your career

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did you ever envision that you would

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have the opportunity to go outside

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that many times and do the variety of

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important work that you and tomorrow are

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yeah thanks for that question rob i

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never of course never envisioned that i

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was you know when i flew on shuttle many

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years ago and and got a chance to do a

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couple spacewalks i really thought that

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was probably going to be the only times

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i got outside

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and uh you know things have played out

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differently so that i've gotten the

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chance to do many more and i'm very

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blessed i feel very lucky and fortunate

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to do that

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and uh this time tamar is going to be

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leading the way on both of these

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spacewalks and i look forward to him

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being in that role and meet us being a

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good support person out there with them

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and we're just going to work together

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closely with the ground teams to make

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sure we get this job done

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well shane uh all the best of luck to

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you and tomah during these spacewalks

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and the rest of your mission aboard the