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#200
by
Ronsmytheiii
on 16 May, 2010 15:34
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ready for Auto on the DAP
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#201
by
Jorge
on 16 May, 2010 15:35
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In the maneuver to -XLV -ZVV. I didn't realize there is also a roll involved in the maneuver (if I'm looking at the graphic correctly).
It depends on how far out of the docking attitude the stack drifts before resuming attitude control. The maneuver is always a three-axis maneuver along the eigenaxis.
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#202
by
Ronsmytheiii
on 16 May, 2010 15:41
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Soichi working on PMA-2 CBM
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#203
by
GoForTLI
on 16 May, 2010 15:45
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In the maneuver to -XLV -ZVV. I didn't realize there is also a roll involved in the maneuver (if I'm looking at the graphic correctly).
It depends on how far out of the docking attitude the stack drifts before resuming attitude control. The maneuver is always a three-axis maneuver along the eigenaxis.
Thanks, Jorge.
I love this site. Now I'm off to learn about an eigenaxis.
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#204
by
GoForTLI
on 16 May, 2010 15:46
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PAO discussing the DAM that wasn't conducted. TCA of the debris was at 10:35 CDT (15:35 GMT). Miss distance was 9 km downtrack. PAO didn't have the vertical separation, but overall the object was safely outside the box.
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#205
by
arkaska
on 16 May, 2010 15:48
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Did PAO just say everybody on the Shuttle has been on ISS before? Good has never been there, his only prior flight was STS-125 to Hubble
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#206
by
kneecaps
on 16 May, 2010 15:50
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In the maneuver to -XLV -ZVV. I didn't realize there is also a roll involved in the maneuver (if I'm looking at the graphic correctly).
It depends on how far out of the docking attitude the stack drifts before resuming attitude control. The maneuver is always a three-axis maneuver along the eigenaxis.
Thanks, Jorge.
I love this site. Now I'm off to learn about an eigenaxis.
You'll love them!
The manuver is done on verniers and no doubt with a very slow rate with tight deadbands (don't want the stack getting to much momentum or torques).
Jorge: What was the cause of the c > 7 minute TIG slip on the early MC 2 burn solution? State vector issues at that time?
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#207
by
Ronsmytheiii
on 16 May, 2010 15:52
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Oleg Kotov is trying to take your picture
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#208
by
GoForTLI
on 16 May, 2010 15:55
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Working APAS hatch opening.
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#209
by
Ronsmytheiii
on 16 May, 2010 15:56
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seems to be a lot of CTB's in Node 2
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#210
by
Aobrien
on 16 May, 2010 15:59
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Am I correct that this will be the first time the SSRMS will be used from Cupola? Wasn't it moved to Cupola after STS-131?
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#211
by
Ronsmytheiii
on 16 May, 2010 15:59
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3 minutes to switch to station attitude control
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#212
by
Ronsmytheiii
on 16 May, 2010 16:00
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Am I correct that this will be the first time the SSRMS will be used from Cupola? Wasn't it moved to Cupola after STS-131?
Yes, there were interface issues but they were solved between STS-131 and STS-132
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#213
by
Ronsmytheiii
on 16 May, 2010 16:02
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orbiter in free drift now, Station in attitude control
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#214
by
Jorge
on 16 May, 2010 16:03
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In the maneuver to -XLV -ZVV. I didn't realize there is also a roll involved in the maneuver (if I'm looking at the graphic correctly).
It depends on how far out of the docking attitude the stack drifts before resuming attitude control. The maneuver is always a three-axis maneuver along the eigenaxis.
Thanks, Jorge.
I love this site. Now I'm off to learn about an eigenaxis.
You'll love them!
The manuver is done on verniers and no doubt with a very slow rate with tight deadbands (don't want the stack getting to much momentum or torques).
Jorge: What was the cause of the c > 7 minute TIG slip on the early MC 2 burn solution? State vector issues at that time?
I'll have to check since I wasn't on console at the time.
Usual contributing causes to late MC2 TIG slips are:
1) Overburn at Ti (-0.2 < VGO X < 0 at cutoff)
2) Start of maneuver back to -Z TGT TRK post-Ti uses aft down-firing jets
3) End of maneuver back to -Z TGT TRK post-Ti uses forward down-firing jets
4) MC1 underburn (0.2 > VGO X > 0 after crew finishes trimming)
5) Late ISS maneuver to docking attitude
which really just goes to show how sensitive MC2 TIG slip is to various trajectory factors. 2) and 3) are just a function of how the ALT DAP selects jets and 1) and 4) are functions of what the final VGO turns out to be when the crew finishes trimming. (There are ways that the crew can "game" the burn trims to force an early TIG slip but we don't typically train them).
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#215
by
Ronsmytheiii
on 16 May, 2010 16:04
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waiting on station to open hatch
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#216
by
GoForTLI
on 16 May, 2010 16:05
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ISS back in attitude control.
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#217
by
kneecaps
on 16 May, 2010 16:06
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I'll have to check since I wasn't on console at the time.
Usual contributing causes to late MC2 TIG slips are:
1) Overburn at Ti (-0.2 < VGO X < 0 at cutoff)
2) Start of maneuver back to -Z TGT TRK post-Ti uses aft down-firing jets
3) End of maneuver back to -Z TGT TRK post-Ti uses forward down-firing jets
4) MC1 underburn (0.2 > VGO X > 0 after crew finishes trimming)
5) Late ISS maneuver to docking attitude
which really just goes to show how sensitive MC2 TIG slip is to various trajectory factors. 2) and 3) are just a function of how the ALT DAP selects jets and 1) and 4) are functions of what the final VGO turns out to be when the crew finishes trimming. (There are ways that the crew can "game" the burn trims to force an early TIG slip but we don't typically train them).
Thanks as always. That is indeed sensitive! We must be talking DVs on the order of 0.1 induced by jet firings back to -Z tracking?
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#218
by
Ronsmytheiii
on 16 May, 2010 16:07
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station PMA hatch is open, go for equalization
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#219
by
Ronsmytheiii
on 16 May, 2010 16:15
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equalization complete
