Author Topic: ISS US EVA 83 - 4A Channel IROSA Install - 22 Dec 2022 [Rubio, Cassada]  (Read 18426 times)

Offline Joachim

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Offline zubenelgenubi

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From today's media teleconference:
Installation circa 1 pm (CST?).
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Offline Joachim

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Offline zubenelgenubi

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4.5 hours into EVA: iROSA is bolted to the installation bracket, some electrical connections made.  The rest will be completed in orbital nighttime.  Prep for this is currently underway.

Some screen captures:
« Last Edit: 12/22/2022 05:01 pm by zubenelgenubi »
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Offline zubenelgenubi

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https://twitter.com/Space_Station/status/1605947348370087936?cxt=HHwWgICjudmmvMksAAAA
Quote
Earth views as Rubio on the right and Cassada on the left are seen working together to release iROSA from itís holding location so that they can relocate it for installation, with the @csa_asc #Canadarm2 seen above! 🔧🌍🦾

https://twitter.com/Space_Station/status/1605964971489120266?cxt=HHwWlMCi9b-oxMksAAAA
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[email protected]_Josh
 and the 750-lb iROSA get a lift to the installation site from the Canadarm2 robotic arm, flown by
@AstroDuke and @Astro_Wakata
 from inside the station. Rubio makes his way to the work site where he prepped the power connection cables earlier in the spacewalk.
« Last Edit: 12/22/2022 05:05 pm by zubenelgenubi »
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Offline Yellowstone10

Station is now in eclipse, and the astronauts are working to disconnect the cables to the legacy arrays / reconnect them to new Y-cables that will splice in the iROSAs.
« Last Edit: 12/22/2022 05:29 pm by Yellowstone10 »

Offline zubenelgenubi

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Earlier in the EVA, removing iROSA from its berth:
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Offline Yellowstone10

All power cable connections have been completed. Astronauts are now tidying up the slack in the cables.

Offline zubenelgenubi

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Some simultaneous screencaps to Yellowstone's.
What are the red and blue dots--bad camera pixels?
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Offline zubenelgenubi

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Station is now in eclipse, and the astronauts are working to disconnect the cables to the legacy arrays / reconnect them to new Y-cables that will splice in the iROSAs.
Doing this in eclipse, as well as powered down, so the astronauts do not electrocute themselves.

I believe the same reason is why they must not be touching circuits, etc at orbital sunrise.
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Offline Yellowstone10

What are the red and blue dots--bad camera pixels?

Yep - pixels in the sensor that have taken radiation hits while in orbit.

Lots of Santa hats in mission control, while we wait for sunrise and some power checkouts by SPARTAN before they unroll the array.

Offline zubenelgenubi

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From earlier, some iROSA mechanical bolting and iROSA side electrical connecting:
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Offline zubenelgenubi

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Orbital sunrise:
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Offline Yellowstone10

And here's Josh Cassada's view as he waits to unbolt the last couple restraints.

Update - first bolt out, PGT in place on the second.
« Last Edit: 12/22/2022 05:52 pm by Yellowstone10 »

Offline Yellowstone10

iROSA is rolling out!

Edit - added Cassada's view.
« Last Edit: 12/22/2022 05:55 pm by Yellowstone10 »

Offline Joachim

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Deployment

Offline zubenelgenubi

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More deploy screencaps:
« Last Edit: 12/22/2022 06:00 pm by zubenelgenubi »
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Offline Yellowstone10

The unrolling end of iROSA is now in view of a hi-def station camera:

Edit - added a view from Rubio's helmet cam showing the cross-section of the boom rolling up as it extends. Astronauts are commenting on the size of the huge winter storm currently over the United States.
« Last Edit: 12/22/2022 06:02 pm by Yellowstone10 »

Offline Yellowstone10

Cassada drives the last couple of bolts to release the tensioners, and that should be it for iROSA deployment.
« Last Edit: 12/22/2022 06:12 pm by Yellowstone10 »

Offline zubenelgenubi

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Work site cleanup, etc.
« Last Edit: 12/22/2022 06:43 pm by zubenelgenubi »
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