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#460
by
RafaelCE
on 07 Feb, 2008 00:17
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From the same thread,
Thanks to Jim!!
Jim - 6/2/2008 7:10 PM
They are on the RSS and provide a seal between the orbiter(payload bay) anf RSS (PCR)
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#461
by
SiameseCat
on 07 Feb, 2008 01:12
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What would happen if a sequence such as OPS 202 PRO was entered into one of the keyboards and the corresponding CRT was off? Would the OPS change still occur?
Also, what would happen if something such as OPS followed by ITEM was entered? Would this cause an error?
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#462
by
Jorge
on 07 Feb, 2008 02:48
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SiameseCat - 6/2/2008 8:12 PM
What would happen if a sequence such as OPS 202 PRO was entered into one of the keyboards and the corresponding CRT was off? Would the OPS change still occur?
The short answer is that the OPS transition will not occur, with a caveat.
Terminology has changed under MEDS. The CRTs and dedicated displays have been replaced by MDUs and the DEUs have been replaced by IDPs. The IDPs communicate between the keyboards and the GPCs. Therefore, if the IDP assigned to a keyboard is powered off, the OPS transition will not occur because there is no way for the command to get to the GPC. Of course, the forward keyboards can be switched between IDPs. The CDR keyboard can talk to IDPs 1 and 3, and the PLT keyboard can talk to IDPs 2 and 3. The aft keyboard is hardwired to IDP 4.
The IDPs also drive the MDUs. The term CRT is still used to refer to the MDUs located in the slots where the CRTs used to be, but an IDP can drive a DPS display on any MDU assigned to that IDP - there is no one-to-one relationship between IDPs and MDUs as there was between the DEUs and CRTs. However, an IDP will not process keyboard inputs unless it is driving a DPS display on one of its MDUs. So if the crew powers off the CRT MDU for that IDP, the OPS transition will not occur. The caveat, of course, is that the crew can simply assign another MDU from that IDP to drive a DPS display.
Also, what would happen if something such as OPS followed by ITEM was entered? Would this cause an error?
It won't cause an error. Pressing an initiator key (OPS, ITEM, SPEC, I/O RESET, GPC/IDP, etc) while a partial command is on the scratch pad will erase the partial command and start a new one.
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#463
by
MKremer
on 07 Feb, 2008 03:08
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Thanks, Jorge...
I understood everything you said, but...
I think your two paragraphs could be at the top of the list of modern 'technobabble' explanations.
(even including some of the best Star Trek technobabble quotes)
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#464
by
Jorge
on 07 Feb, 2008 03:42
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#465
by
psloss
on 07 Feb, 2008 08:48
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MKremer - 6/2/2008 11:08 PM
I think your two paragraphs could be at the top of the list of modern 'technobabble' explanations.
I think we should keep the point deductions to a minimum given that the question was asked in technobabble. I can speak in some dialects of technobabble (even if I don't know what I'm saying too often
), but given the widening audience here, I guess the answers have to be in English, too.
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#466
by
Bejowawo
on 07 Feb, 2008 11:35
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I just noticed that the thrusters on the front of the Shuttle are covered with some type of sheet-material.
Can anybody tell what type of material that is and at what point in the ascent / flight those covers become loose and how?
Thanks in advance!
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#467
by
psloss
on 07 Feb, 2008 11:42
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#468
by
psloss
on 07 Feb, 2008 11:54
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Listening to George Diller talking about the Eastern Test Range communications and wondering about the receiver for the ET camera video during the STS-125, which is due-east/28.5 inclination...is the late second stage period going to be relayed through Bermuda for STS-125 (as opposed to Wallops for all these high-inclination launches)?
Thanks.
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#469
by
ChrisC
on 07 Feb, 2008 21:47
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In today's live STS-122 thread, somebody said:
... The concern is there are thunderstorms [that] may move into the 20 naut. mile circle of the RTLS SLF zone during the liftoff or at the RTLS time (about 30 - 45 minutes after launch)
Is the RTLS landing REALLY 30-45 minutes after launch? I can't imagine that they'd be that far away and gliding that long. I am aware of the engine deceleration task that's part of an RTLS abort. Can someone point me to a timeline on that abort sequence? I did some googling/wikipediaing, which only resulted in some vague mentions of 25 minutes and 35 minutes ...
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#470
by
rdale
on 07 Feb, 2008 21:56
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The shuttle goes pretty far before they say "negative return"
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#471
by
psloss
on 07 Feb, 2008 22:05
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ChrisC - 7/2/2008 5:47 PM
Is the RTLS landing REALLY 30-45 minutes after launch? I can't imagine that they'd be that far away and gliding that long. I am aware of the engine deceleration task that's part of an RTLS abort. Can someone point me to a timeline on that abort sequence? I did some googling/wikipediaing, which only resulted in some vague mentions of 25 minutes and 35 minutes .
A TAL abort landing would be in the 45 minutes after liftoff range. RTLS would be in the 20-25 minutes after liftoff range. The durations would vary somewhat...
A couple of specific working scenarios are in documents on L2.
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#472
by
Austin
on 07 Feb, 2008 22:21
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ChrisC - 7/2/2008 5:47 PM
In today's live STS-122 thread, somebody said:
... The concern is there are thunderstorms [that] may move into the 20 naut. mile circle of the RTLS SLF zone during the liftoff or at the RTLS time (about 30 - 45 minutes after launch)
Is the RTLS landing REALLY 30-45 minutes after launch? I can't imagine that they'd be that far away and gliding that long. I am aware of the engine deceleration task that's part of an RTLS abort. Can someone point me to a timeline on that abort sequence? I did some googling/wikipediaing, which only resulted in some vague mentions of 25 minutes and 35 minutes ...
Please do not rely on wikipedia for accurate information about the space program...or much else for that matter. I have seen a great deal of info there that was simply false.
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#473
by
psloss
on 08 Feb, 2008 00:23
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#474
by
ZeeNL
on 08 Feb, 2008 00:43
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#475
by
Do Shuttles Dream
on 08 Feb, 2008 02:58
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On the launch thread, Chris posted during launch....
"In the bucket. SSMEs at 2/3rds." then "Three at 104"
So is "in the bucket" representative of what the engine thrust would look like on a graph as they throttle down then back up again?
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#476
by
Jim
on 08 Feb, 2008 03:02
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Do Shuttles Dream - 7/2/2008 10:58 PM
On the launch thread, Chris posted during launch....
"In the bucket. SSMEs at 2/3rds." then "Three at 104"
So is "in the bucket" representative of what the engine thrust would look like on a graph as they throttle down then back up again?
correct
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#477
by
Susan27
on 08 Feb, 2008 11:09
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Hi,
on NASA-TV they say that the OBSS will inspect the "Starboard wing" or so...
Could you therefore describe where I can find this "Starboard (wing) section" of the shuttle? Where is it exactly located?
Thanks in advance!
Kind regards
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#478
by
Susan27
on 08 Feb, 2008 11:12
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Hi,
while watching (partyl) NASA-TV with current STS-122 coverage I am wondering how the shuttle crew will exactly perform the closing/approach ("hunting the ISS") towards the ISS to finally dock tomorrow...
Do you know how this prcoedure is performed?
I heard about different stages of rendezvous:
1. Alligning orbits
2. Alligning planes
3. Synchronizing Orbits
4. Create an "intersection" of the ISS/shuttle`s orbit by lowering/raising current orbit
5. Final docking maneuver
Question:
1) Is this the way NASA will do it in reality? I doubt because it seems that those maneuvers will need much, much fuel, so there must be a method to rendezvous with less fuel consumtion...So could you briefly decribe how the procedure is performed?
2) Yesterday I heard something about Rendezvous Maneuver NC-1 (bytheway: what does NC stand for?). What is this maneuver exactly about? ANd what is the NC-2 burn they will do today?
3) And what is the TI-burn (Terminal insertion)?
Thanks very much!
Kind regards
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#479
by
Jim
on 08 Feb, 2008 11:16
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Starboard wing is the right wing of the orbiter
