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

zubenelgenubi · « **Reply #41 on:** 12/22/2022 04:14 pm »

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

Joachim · « **Reply #42 on:** 12/22/2022 04:21 pm »

zubenelgenubi · « **Reply #43 on:** 12/22/2022 04:56 pm »

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:

zubenelgenubi · « **Reply #44 on:** 12/22/2022 05:03 pm »

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 it’s 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

Quote

[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.

Yellowstone10 · « **Reply #45 on:** 12/22/2022 05:18 pm »

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.

zubenelgenubi · « **Reply #46 on:** 12/22/2022 05:22 pm »

Earlier in the EVA, removing iROSA from its berth:

Yellowstone10 · « **Reply #47 on:** 12/22/2022 05:32 pm »

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

zubenelgenubi · « **Reply #48 on:** 12/22/2022 05:33 pm »

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

zubenelgenubi · « **Reply #49 on:** 12/22/2022 05:36 pm »

Quote from: Yellowstone10 on 12/22/2022 05:18 pm

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.

Yellowstone10 · « **Reply #50 on:** 12/22/2022 05:43 pm »

Quote from: zubenelgenubi on 12/22/2022 05:33 pm

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.

zubenelgenubi · « **Reply #51 on:** 12/22/2022 05:45 pm »

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

zubenelgenubi · « **Reply #52 on:** 12/22/2022 05:49 pm »

Orbital sunrise:

Yellowstone10 · « **Reply #53 on:** 12/22/2022 05:50 pm »

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.

Yellowstone10 · « **Reply #54 on:** 12/22/2022 05:53 pm »

iROSA is rolling out!

Edit - added Cassada's view.

Joachim · « **Reply #55 on:** 12/22/2022 05:55 pm »

Deployment

zubenelgenubi · « **Reply #56 on:** 12/22/2022 05:56 pm »

More deploy screencaps:

Yellowstone10 · « **Reply #57 on:** 12/22/2022 05:59 pm »

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.

Yellowstone10 · « **Reply #58 on:** 12/22/2022 06:11 pm »

Cassada drives the last couple of bolts to release the tensioners, and that should be it for iROSA deployment.

zubenelgenubi · « **Reply #59 on:** 12/22/2022 06:30 pm »

Work site cleanup, etc.