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#480
by
ZeeNL
on 14 Jun, 2007 03:37
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jmjawors - 14/6/2007 5:34 AM
The mystery is in the cause not the possibilities.
I found this presser to be very interesting. Lots of finger pointing, but I'm sure they'll find the right solution.
I agree with the mystery about the cause. I really hope they will find the cause and fix it, but I feel a bit scared about it (just a personal feeling, not based on knowledge.)
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#481
by
Norm Hartnett
on 14 Jun, 2007 03:39
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What has changed.
Thats what I always look for when my networks start having issues, pretty much SOP. Power is obvious but they also ran that external data cable a couple of weeks ago. I wonder if there are deltas in how Atlantis is linked in. When you see the kind of issue they ran into with the DLAs it starts you thinking about the wireing/data out of the 3/4. First step: isolate the systems sounds reasonable to me.
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#482
by
Chris Bergin
on 14 Jun, 2007 03:43
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I think it was Jim Oberg with the question about possibily radar induced from the ground (did I hear it right, I was busy writing up quotes on the OMS pod).
Seemed to stump Mike S
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#483
by
stockman
on 14 Jun, 2007 03:45
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I know its a bit off topic but WOW.. I just saw the ISS/Shuttle pass to the north of me for about 4 minutes. This is from Southern Ontario at 11:35 pm. The last time I saw this was about 5 years ago and I am quite impressed with how bright it looked even though it was a relatively low elevation to me. I now am going to play a bit with my orbit predicter to see if I can get any overhead passes this week. I might need my sunglasses!!!
Great work here guys. I love this site!
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#484
by
jmjawors
on 14 Jun, 2007 03:46
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Norm Hartnett - 13/6/2007 10:39 PM
...about the wireing/data out of the 3/4. First step: isolate the systems sounds reasonable to me.
Me too.
stockman - 13/6/2007 10:45 PM
I know its a bit off topic but WOW.. I just saw the ISS/Shuttle pass to the north of me for about 4 minutes.
I believe it! Waiting for my first good look tomorrow night.
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#485
by
ZeeNL
on 14 Jun, 2007 03:48
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Norm Hartnett - 14/6/2007 5:39 AM
What has changed.
Thats what I always look for when my networks start having issues, pretty much SOP. Power is obvious but they also ran that external data cable a couple of weeks ago. I wonder if there are deltas in how Atlantis is linked in. When you see the kind of issue they ran into with the DLAs it starts you thinking about the wireing/data out of the 3/4. First step: isolate the systems sounds reasonable to me.
I think a lot of people are looking at pictures and diagrams of the newly installed part. Houston was asking Pat to look for a serial number on one of the motor housings. It would be a real shame if the new addition would have serious problems with the wiring etc.
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#486
by
ZeeNL
on 14 Jun, 2007 03:51
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stockman - 14/6/2007 5:45 AM
I know its a bit off topic but WOW.. I just saw the ISS/Shuttle pass to the north of me for about 4 minutes. This is from Southern Ontario at 11:35 pm. The last time I saw this was about 5 years ago and I am quite impressed with how bright it looked even though it was a relatively low elevation to me. I now am going to play a bit with my orbit predicter to see if I can get any overhead passes this week. I might need my sunglasses!!!
Great work here guys. I love this site!
The ISS is very bright indeed! I have seen a couple of passes even through some high clouds! For predicting passes, use
www.heavens-above.com or software like orbitron or STSplus or your own predictor
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#487
by
Earth_Bound_Misfit
on 14 Jun, 2007 03:51
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ZeeNL - 14/6/2007 2:32 PM
I don't think it is a mystery, it is very simple. If they can't get the Russian computers up, the ISS has to be evacuated, but that is the worst case scenario and that is why they would like another day to avert this scenario.
I suspect a power spike has damaged them. Hopefully they can be repaired, otherwise the STS program may be getting wound up early.
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#488
by
Norm Hartnett
on 14 Jun, 2007 04:02
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It depends on whether the crash was a "normal" crash or not. If it was a normal crash then they are looking at why the auto recovery did not work. Thats were the "what has changed" kicks in. They will have to look at what has changed since the last auto recovery which could cover a lot of ground.
If it was a non-normal crash then its possible they are looking at a one time event such as a spike, the thing is these are mil spec computers so they are pretty robust.
That new external data line bothers me. Too exposed, possibly unterminated, stuff like that is what I look for.
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#489
by
rcaron
on 14 Jun, 2007 04:07
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I'm assuming the data cable you're talking about is the one they ran during Russian EVA last week. Its an Ethernet cable - but only the Russian half of it. The side connecting the cable to the US segment is not hooked up yet, so my impression is that the cable is inert. As such, I doubt it had anything to do with the malfunctions the Russian computers are experiencing.
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#490
by
Earth_Bound_Misfit
on 14 Jun, 2007 04:07
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Norm Hartnett - 14/6/2007 3:02 PM
these are mil spec computers so they are pretty robust.
Good thing that. Fingers crossed here.
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#491
by
ZeeNL
on 14 Jun, 2007 04:10
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Earth_Bound_Misfit - 14/6/2007 5:51 AM
ZeeNL - 14/6/2007 2:32 PM
I don't think it is a mystery, it is very simple. If they can't get the Russian computers up, the ISS has to be evacuated, but that is the worst case scenario and that is why they would like another day to avert this scenario.
I suspect a power spike has damaged them. Hopefully they can be repaired, otherwise the STS program may be getting wound up early.
I think they are talking about SIX computers being in a non normal state and I am sure not all of those computers are on the same powersystem.
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#492
by
ZeeNL
on 14 Jun, 2007 04:12
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The crew video was awesome though!
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#493
by
Norm Hartnett
on 14 Jun, 2007 04:15
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rcaron - 13/6/2007 9:07 PM
I'm assuming the data cable you're talking about is the one they ran during Russian EVA last week. Its an Ethernet cable - but only the Russian half of it. The side connecting the cable to the US segment is not hooked up yet, so my impression is that the cable is inert. As such, I doubt it had anything to do with the malfunctions the Russian computers are experiencing.
I had an experienced contractor run an un-terminated Ethernet cable that brought down one of my networks. He had coiled it up and lashed it to a power line temporarily and it got induced low voltage surges that looked like bad data. Don't like stuff like this, took most of a day to ID and get the network back up.
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#494
by
jmjawors
on 14 Jun, 2007 04:18
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ZeeNL - 13/6/2007 10:51 PM
For predicting passes...
I've found NASA.gov's own tracker to be unfailingly accurate. Add it to the list as well.
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#495
by
Bubbinski
on 14 Jun, 2007 04:18
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I would hope the computers come back on line, and being in tech support I agree with Norm....what changed? I would also add, what error messages were they getting on boot up? Can they replicate it on the ground?
If ISS HAS to be evacuated, I would hope the program would at least proceed with the HST repair job and then they can call it quits. But it's a bit early to be thinking too much about that just yet. Let's see what happens.
ISS is entering sunrise, I'm attaching a pic.
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#496
by
ZeeNL
on 14 Jun, 2007 04:22
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Norm Hartnett - 14/6/2007 6:15 AM
rcaron - 13/6/2007 9:07 PM
I'm assuming the data cable you're talking about is the one they ran during Russian EVA last week. Its an Ethernet cable - but only the Russian half of it. The side connecting the cable to the US segment is not hooked up yet, so my impression is that the cable is inert. As such, I doubt it had anything to do with the malfunctions the Russian computers are experiencing.
I had an experienced contractor run an un-terminated Ethernet cable that brought down one of my networks. He had coiled it up and lashed it to a power line temporarily and it got induced low voltage surges that looked like bad data. Don't like stuff like this, took most of a day to ID and get the network back up.
Well, when I was a first year university student, we wanted access in the project room to the internet, so we just unscrewed the weird little bolt on coax cable
But on topic: I think it is either a software problem with the new mass of the ISS+shuttle+S3S4 truss or an EM issue with the shuttle (less likely).
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#497
by
jmjawors
on 14 Jun, 2007 04:22
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I guess I'm wrong, but I was under the impression that the Russian side was not really patched in to the US side's power grid... and that that was a project for a later date.
But I am such a novice on such things, and I'm sure I'm incorrect.
*shrug*
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#498
by
rdale
on 14 Jun, 2007 04:23
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Bubbinski - 14/6/2007 12:18 AM
I would hope the computers come back on line, and being in tech support I agree with Norm....what changed? I would also add, what error messages were they getting on boot up? Can they replicate it on the ground?
If you watched the presser they mentioned that the Russians need to wait for ISS to pass over Russia at the right times for them to get all the details down that they need. And it was mentioned that occurs overnight / early tomorrow morning. So they really haven't been able to fully troubleshoot - to even think to start mentioning a possible end to ISS and Space Shuttle missions is quite surprising to me...
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#499
by
rdale
on 14 Jun, 2007 04:25
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jmjawors - 14/6/2007 12:22 AM
I guess I'm wrong, but I was under the impression that the Russian side was not really patched in to the US side's power grid... and that that was a project for a later date.
In the press conference when they talked about some possibilities, it was mentioned that one of the first things they will probably try is taking the new power sources offline... It was also mentioned that the Russian side can run the computers on their own power, but that's only temporary.
12:30am EDT for SRB video.
