Author Topic: RS EVA VKD-60 - Workpost transfer, MMOD shielding - Aug 9 (Prokopyev, Petelin)  (Read 12216 times)

Offline Yellowstone10

https://www.nasa.gov/press-release/nasa-sets-coverage-of-roscosmos-spacewalk-outside-space-station

Quote
NASA will provide live coverage beginning at 10:15 a.m. EDT Wednesday, Aug. 9, as two Roscosmos cosmonauts conduct a spacewalk to upgrade the International Space Station. The spacewalk is expected to begin about 10:45 a.m., and last up to seven hours.

Coverage will air on NASA Television, the NASA app, and the agency’s website.

Expedition 69 crewmates Sergey Prokopyev and Dmitri Petelin will venture outside the station’s Poisk airlock to attach three debris shields to the Rassvet module. They also will test the sturdiness of a work platform that will be affixed to the end of the European robotic arm attached to the Nauka multipurpose laboratory module.

The spacewalk will be the eighth for Prokopyev, who will wear an Orlan spacesuit with red stripes, and the sixth for Petelin, who will wear a spacesuit with blue stripes.

Offline Yellowstone10

Here's the animation laying out the expected tasks for tomorrow's spacewalk:



Rough sequence of events:
 - Exit Poisk airlock with MMOD shield bundles
 - Translate along Strela-2 forward to Zarya module, then nadir to Rassvet module
 - Install 2 MMOD shields where the ShK airlock was previously stowed
 - Install 1 MMOD shield where the RTOd radiator was previously stowed
 - Remove portable workstation from Rassvet and install on the European Robotic Arm
 - ERA moves to a position near Nauka
 - Retrieve launch restraints that were removed from workstation and translate to Poisk, temporarily stowing restraints on the Strela-1 operator's post
 - Retrieve crew lock bags from airlock
 - Translate via Strela-1 nadir to Nauka to meet up with ERA / portable workstation
 - Prokopyev ingresses the workstation, Petelin positions himself to take imagery of robotic operations
 - ERA performs lengthy test maneuver, returns back to ingress point
 - Prokopyev egresses the workstation, spacewalkers translate zenith via Strela-1 to Poisk
 - Retrieve protective shroud bundle from airlock (shrouds were removed from RSPI-M after installation during VKD-59)
 - Prokopyev ingresses Strela-1 operator's post and jettisons shroud bundle and portable workstation launch restraints
 - Return to airlock, tool inventory, suit inspection
 - Enter airlock, end spacewalk.
« Last Edit: 08/08/2023 04:30 pm by Yellowstone10 »

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Offline Yellowstone10

NASA TV coverage has begun. Rob Navias providing commentary.
« Last Edit: 08/09/2023 02:20 pm by Yellowstone10 »

Offline Yellowstone10

Depressurization is underway.

Offline Yellowstone10

Hatch is open as of 14:45Z / 10:45 Eastern Time.

Offline Yellowstone10

Tethers are secured, sublimators on, egressing the airlock. We also have our first views of one of the cosmonauts.

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Both cosmonauts now outside the airlock, and they're activating the helmet cameras.

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Hooking up to the Strela translation ring. Note the flat panel MMOD shielding to be installed on Rassvet.

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Heading on over to Rassvet...

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Helmet cam views of a rather grimy Zarya. Also, the work platform they'll be working with later in the EVA.

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Earth! Looks like a pretty nice place to live.

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Getting ready to install the MMOD shields. (Interesting to see how they handle the connectors without a PGT!)

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First panel is on, working on the second.

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50 minutes elapsed time. The cosmonauts have been told to rest for a bit.

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A good view of Cygnus NG-19 - and behind it, France. They're commenting on the lack of snow in the Alps.

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Getting things tool-tight with the ratchet wrench.

Offline Yellowstone10

So that's what those white flaps are for - to cover the attachment fittings.

Offline Yellowstone10

The cosmonauts had a little difficulty translating to the next worksite due to some awkwardly long reaches between handrails, but they seem to have gotten it figured out.

Helmetcam view with the Cupola in sight - bet the USOS crew will get some good pictures. Also, an external camera view of the two cosmonauts and the ERA to which they'll be attaching the work platform.

Station has just gone into an orbital night.
« Last Edit: 08/09/2023 03:59 pm by Yellowstone10 »

Offline Yellowstone10

They're in a loss-of-signal on the video, but the audio feed from the translator suggests they've got the third panel in place and are working on tightening the fasteners.

Offline Yellowstone10

Yep, there's the third MMOD panel. I'd be interested to see the risk-mitigation math that calls for adding such a small piece of shielding!

Offline Yellowstone10

Now at the portable workstation worksite.

Also, a couple views of the cosmonauts from each other's helmetcams.

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Removing some launch restraint bars that were on the portable workstation.

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Restraints have been removed, and Petelin is going to stash them somewhere temporarily. Now entering an orbital daytime.

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Space knife time! (They're cutting the locking wires that ensured the latches holding the portable work platform remained closed.)

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Opening the locks...

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The portable workstation is now up and off of Rassvet. It's a bit spindly, but you can see it in the external camera view.

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Fedyaev sent commands to the ERA to move the end closer to Rassvet - the adapter to which they'll attach the work platform is visible at left.

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Still getting things lined up with the arm.

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Working to get the platform lined up and installed on the adapter, but apparently the labeling is not particularly clear on how exactly to do that.

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Seems to be more or less connected, but they're now working to get it rotated into the proper orientation.

Offline Yellowstone10

There's the alignment they were looking for.

Offline Yellowstone10

Incidentally, per Anatoly Zak, the Russian term for the portable work platform (which the Russian translator keeps calling the PRM) is Переносное Рабочее Место, or ПРМ. (Perenosnoye Rabocheye Mesto, to transliterate.)

Offline Yellowstone10

Debating tether placement.

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Back from an extended LOS as they reach 3 hours 0 minutes of elapsed time on the EVA.

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Still waiting to get everyone in position to move the ERA to its next location. Interestingly, they mentioned closing their visors as a precaution against some laser equipment on the ERA.

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The cosmonauts are now heading back zenith on Rassvet to retrieve the PRM launch restraints and eventually head over to Nauka for the PRM testing component of the spacewalk.

Offline Yellowstone10

Back to the Strela translation ring to head towards Poisk.
« Last Edit: 08/09/2023 06:08 pm by Yellowstone10 »

Offline Yellowstone10

Launch restraint bundle has been stowed at the Strela operator's post.

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A view inside the open airlock hatch of Poisk as the cosmonauts retrieve crew lock bags - you can see the metal shrouds from the radio block that was installed on VKD-59, which will be jettisoned towards the end of this spacealk.

Offline Yellowstone10

Tethererd to the other Strela translation ring, to head down to Nauka.

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Translating down Nauka - got a good view of one of the main thrusters (now deactivated) as they passed by.

Offline Yellowstone10

One of the cosmonauts is cutting a wire tie near the anchor point where they'll board the Portable Work Platform - no helmetcam, though, so I'm not quite sure where that is. Seems to be on the foot restraints of the PRM?

Edit - so there actually is a helmetcam view on the "Live Video from the International Space Station" feed, but it's very, very pixelated. Wonder if that's a function of poor wifi coverage down at the nadir end of Nauka?
« Last Edit: 08/09/2023 06:46 pm by Yellowstone10 »

Offline Yellowstone10

They're waiting until after an upcoming eclipse to have Prokopyev board the platform, presumably for more even lighting. In the meanwhile, here's Prokopyev's view of the foot restraints, and Petelin's view of Prokopyev.

Ooh, and another neat view from Prokopyev looking back up at the station.

Offline Yellowstone10

Orbital night now, but they've got some ratty comms and are going to wait about another 10 minutes to resume with the planned work.

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Prokopyev is now securing tethers to the work platform and will be stepping into the foot restraint shortly.

Offline Targeteer

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TDRS-8 has been in constant contact with Canberra on S Band, apparently providing at least near continuous voice comms. Interesting because at least one recent US EVA had both Ku and S band outages during TDRS-Z passes requiring an onboard US crew member to assume EVA support responsibilities.  How does a Russian EVA get better US comm network support?
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Yellowstone10

Getting feet installed, with a little bit of difficulty - it occurs to me that the Russian cosmonauts don't have quite as much practice entering APFRs as their USOS counterparts.

Edit - the issue was that the heel stops hadn't been moved back far enough before Prokopyev stepped in. He got out, reset them - seems to be working now.
« Last Edit: 08/09/2023 07:32 pm by Yellowstone10 »

Offline Yellowstone10

Successfully in the foot restraint. It's interesting to note that there's a physical stop for the ERA to rest against while a spacewalking astronaut boards the portable work platform - reduces the play in the system, I assume.

Wider-angle views of the cosmonauts as we enter an orbital daytime.

Offline Yellowstone10

Petelin's POV as the sun comes up. About 5 minutes until arm movement starts.

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Arm movement is underway, and it is very slow.

Offline Yellowstone10

About 1 meter of motion so far.

Offline Yellowstone10

Translating continues...
« Last Edit: 08/09/2023 07:57 pm by Yellowstone10 »

Offline Yellowstone10

Continuing...

Offline russianhalo117

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Yep, there's the third MMOD panel. I'd be interested to see the risk-mitigation math that calls for adding such a small piece of shielding!
The dual purpose thermal and mmod shielding had to be omitted to attached and fly the radiator and the SrK Airlock to provide the necessary mating interface and orbiter payload bay safety clearances with Nauka components stowed in their launch configuration. The panels have been waiting with Rassvet since the module arrived on station. The radiator and SrK provides the MMOD and thermal protection while they were stowed on Rassvet.
« Last Edit: 08/09/2023 08:04 pm by russianhalo117 »

Offline Yellowstone10

Coming back in to "dock" at the ingress / egress point. Total movement took a little less than 30 minutes, vs. 40 minutes originally mentioned.

Offline Yellowstone10

Prokopyev is back out of the portable work station, and the spacewalkers will start heading back up towards Poisk.

The radiator and SrK provides the MMOD and thermal protection while they were stowed on Rassvet.

What I was more curious about was the size - the new MMOD shield covers a much smaller area than the radiator did.

Offline Yellowstone10

Translating along Nauka.

Does anyone happen to know - I'd assume the PRM would get in the way for certain ERA operations if it were left attached. Can it be stored back in that spot on Rassvet when it's not being used, or does it go somewhere on Nauka?

Offline Yellowstone10

Crew is back at Poisk. Prokopyev is stowing the crew lock bag and picking up the bundle with the shrouds that will be jettisoned.

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Here are the shrouds and launch restraint poles that are to be jettisoned. Sounds like the cosmonauts want to wait for an orbital day for the toss, but they've just gone into a night pass.

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And... toss!

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Now that they're using foot restraints, the boots become part of the pre-entry contamination check.

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No video, but one of the cosmonauts reports that he just jettisoned a bundle of towels.
« Last Edit: 08/09/2023 08:56 pm by Yellowstone10 »

Offline Yellowstone10

Tools and tethers inventory underway.

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Prokopyev is in the airlock, Petelin's still finishing up. Seems a lot roomier than Quest, that's for sure...

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Cosmonauts have removed and stowed the protective ring (that guards the hatch seal).

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Hatch is closed at 6 hours 35 minutes of elapsed time on the EVA.

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200 millibars of pressure.

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Around 260 millibars, and they're into a 10-minute stabilization period.

The obligatory "Spacewalk By The Numbers" slide.

Offline Yellowstone10

NASA TV coverage has wrapped up, but we've still got the audio feed over on the Live Video from the ISS stream. (Edit - but unfortunately, it's untranslated.)
« Last Edit: 08/09/2023 09:35 pm by Yellowstone10 »

Offline centaurinasa

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NASA TV coverage has wrapped up, but we've still got the audio feed over on the Live Video from the ISS stream.

And thanks Yellowstone10 for your awesome coverage !
To boldly go where no human has gone before !

Offline russianhalo117

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Prokopyev is back out of the portable work station, and the spacewalkers will start heading back up towards Poisk.

The radiator and SrK provides the MMOD and thermal protection while they were stowed on Rassvet.

What I was more curious about was the size - the new MMOD shield covers a much smaller area than the radiator did.
They are installed only where the previously stowed elements physically touched the Rassvet module itself. The areas where they touched are the same size as the MMOD panels installed today.
Translating along Nauka.

Does anyone happen to know - I'd assume the PRM would get in the way for certain ERA operations if it were left attached. Can it be stored back in that spot on Rassvet when it's not being used, or does it go somewhere on Nauka?
The PRM Adapter was installed on Nauka's UFP2 Passive Attachment Pointby during an earlier spacewalk is also PRM's operational stowage location.
« Last Edit: 08/09/2023 10:10 pm by russianhalo117 »

Offline Yellowstone10

The PRM Adapter was installed on Nauka's UFP2 Passive Attachment Pointby during an earlier spacewalk is also PRM's operational stowage location.

Ah, I see my error - I was assuming the adapter was something attached to the side of the ERA end effector (like the mounting points for an APFR on the Canadarm2 LEEs), but it's actually a totally separate unit that the ERA grapples when needed, and that's left on the UFP2 point when not in use.

Offline SMS

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NASA ISS EVAs stats:
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SMS ;-).

Offline space_19771999

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NASA photos.

Offline Yellowstone10

https://twitter.com/planet4589/status/1690132164023586816

Quote
An object released from ISS and cataloged as 1998-067VY / 57599 is probably the RSPI-M cover bundle jettisoned during the VKD-60 spacewalk on Aug 9. The towel bundle jettisoned during the same EVA has not been cataloged.

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