Author Topic: LIVE: Expedition 35 US Spacewalk (EVA-21) - May 11, 2013 (Read 149546 times)

Chris Bergin · « **Reply #60 on:** 05/10/2013 08:12 pm »

Full court press for the teams involved.

Know it's the P6 array.

Have a timeline and know what they need to do.

Crew was very excited to know they would be doing an EVA.

Crew will go to bed at 16:30 Central. Wake up at 1am.

2:15am for prep.

7:15am hatch open.

Chris Bergin · « **Reply #61 on:** 05/10/2013 08:13 pm »

You guys saw these this morning via Pete's article, via L2

Chris Bergin · « **Reply #62 on:** 05/10/2013 08:15 pm »

Will temp stow the unit before going after the spare and replace that in place.

Chris Bergin · « **Reply #63 on:** 05/10/2013 08:17 pm »

Visual inspection of each other because there will be ammonia in the area. Bake up timer will be used. Another check at 5psi once back in the airlock.

ChrisC · « **Reply #64 on:** 05/10/2013 08:18 pm »

From earlier: Mike S said the leak flow rate prior to yesterday was around 5 pounds per year. Starting early yesterday it jumped up to 5 pounds per day. I'm not sure about the "per day" unit.

Chris Bergin · « **Reply #65 on:** 05/10/2013 08:23 pm »

Question time.

Robert - who I think is the only person there (short notice I guess) - asking about timeline EVA to Soyuz depart.

Suff notes the experience of the EVAers helped. Power system isn't the reason for the immediate EVA, it's the pressure they have in the system may allow them to see the leak right now.

Quick EVA prep work:

Experience and preliminary plans. Combined with the crew is very trained and know the area. One of the faster ones.

If they can't find the leak:

Will be another EVA and will replan. Plan right now is to changeout the pump as it's the most likely source. Might solve the problem in one EVA.

Should be able to operate nominal systems with the 7 of 8 channels working.

Chris Bergin · « **Reply #66 on:** 05/10/2013 08:33 pm »

Not a dramatic saving by turning the system off now, just providing the best chance to have enough ammonia in the system to see the leak.

System is in a passive state. Will take many days to leak the rest of the ammonia.

Unlikely to be a MMOD strike. Lot of opportunities to recover the system.

Below seven channels would mean they would not be able to operate everything as they would want to.

For Station during an increment this EVA is setting the fastest turnaround.

Three spare pumps on Station. HTV and Dragon can bring up more if needed.

Chris Bergin · « **Reply #67 on:** 05/10/2013 08:40 pm »

No problem with the crew size. They have seven out of eight channels.

6hrs 15mins PET for the EVA.

Recharge the system without having to deal with the nitrogen tanks would be a likely future plan.

They would not want to bring a leaking box into the ISS (for a potential return to Earth) because of the ammonia.

Unpress return can't be done.

Suff says it's more of an annoying problem (as opposed to serious, critical). Significant if they can't solve it as the next power channel to go down would cause power management challenges.

And that's over.

Chris Bergin · « **Reply #68 on:** 05/10/2013 08:41 pm »

Formal approval for EVA comes from the IMMT later.

psloss · « **Reply #69 on:** 05/10/2013 08:47 pm »

Quote from: Chris Bergin on 05/10/2013 08:41 pm

Formal approval for EVA comes from the IMMT later.

Mr. Navias also noted that if the EVA is approved for tomorrow, NASA TV coverage would begin at 6 am Central. (1100 GMT).

Edit: also that there would be a post-EVA status briefing.

John44 · « **Reply #70 on:** 05/10/2013 08:51 pm »

ISS Status Briefing - May 10
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&view=article&id=8255

Targeteer · « **Reply #71 on:** 05/10/2013 09:09 pm »

Quote from: Chris Bergin on 05/10/2013 08:09 pm

No change to crew departure.

This really surprised me. Losing two days of crew prep by Hadfield and Marshburn seemed to point to a delay.

psloss · « **Reply #72 on:** 05/10/2013 09:11 pm »

Quote from: John44 on 05/10/2013 08:51 pm

ISS Status Briefing - May 10
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&view=article&id=8255

I missed the beginning of the live broadcast, but the start in the clip is choppy -- was that as broadcast?

robertross · « **Reply #73 on:** 05/10/2013 09:16 pm »

Quote from: Chris Bergin on 05/10/2013 08:12 pm

7:15am hatch open.

Thanks for the coverage Chris.

Many will be glad (including me), that it's on a weekend and in a reasonable timeframe to watch live.

(so much for my regularly planned activities, but this is much better) hehe

robertross · « **Reply #74 on:** 05/10/2013 09:17 pm »

Quote from: Targeteer on 05/10/2013 09:09 pm

Quote from: Chris Bergin on 05/10/2013 08:09 pm
No change to crew departure.

This really surprised me. Chris Hadfield did pick up some activities scheduled for Chris Cassidey on Sunday but losing two days of crew prep by Hadfield and Marshburn seemed to point to a delay.

Yeah, I'm a bit bummed out by that. I would have really liked to see Chris Hadfield up for a few more days. I can't believe how fast the time has flown by!

rdale · « **Reply #75 on:** 05/10/2013 09:22 pm »

The toolkit config is pretty much done per the nighttime chat. Everything except putting serial numbers to paper. They will stay with 3 "wobble(?)" sockets. One on each PGT and one in crewlock bag 1.

Each side was pretty much set for tonight, so they'll leave them alone and let them read and sleep. They have an ammonia expert on console so if any questions they can call down.

"If wheels is on console, I wonder if he was the cause?"

"Chris gave a great crew brief so we're getting ourselves ready for tomorrow"

robertross · « **Reply #76 on:** 05/10/2013 09:24 pm »

The wobble sockets allow a certain degree of angular movement so that they don't have to be straight on with tool on a fastener.

John44 · « **Reply #77 on:** 05/10/2013 09:36 pm »

Quote from: psloss on 05/10/2013 09:11 pm

Quote from: John44 on 05/10/2013 08:51 pm
ISS Status Briefing - May 10
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&view=article&id=8255
I missed the beginning of the live broadcast, but the start in the clip is choppy -- was that as broadcast?

thanks

video has been replaced

Space Pete · « **Reply #78 on:** 05/10/2013 09:51 pm »

Some images of the EVA preparation now up in the ISS gallery:

http://spaceflight.nasa.gov/gallery/images/station/crew-35/inflight/ndxpage22.html

brahmanknight · « **Reply #79 on:** 05/10/2013 10:03 pm »

I don't recall ever seeing an image of a MMT meeting before that photo gallery.