-
#40
by
psloss
on 10 Jun, 2007 16:02
-
JimO - 10/6/2007 11:52 AM
"Ti" -- you might be amused to learn that when I documented rendezvous crew procedures for the mission operations handbook back in the mid-1980s, people had already forgotten what "TI" stood for, and we had to make up a new meaning for it. "NC" and "NPC" and "NCC" -- those were easy. "Ti" was actually a puzzler, but we invented something that sounded credible.
They might be easy for mission ops people, but could you spell it out for sofa jockeys like me?
-
#41
by
Chris Bergin
on 10 Jun, 2007 16:03
-
JimO - 10/6/2007 4:52 PM
"Ti" -- you might be amused to learn that when I documented rendezvous crew procedures for the mission operations handbook back in the mid-1980s, people had already forgotten what "TI" stood for, and we had to make up a new meaning for it. "NC" and "NPC" and "NCC" -- those were easy. "Ti" was actually a puzzler, but we invented something that sounded credible.
Nice story Jim
RCS firings for phasing and height ahead of the TI burn now being initiated.
-
#42
by
psloss
on 10 Jun, 2007 16:03
-
Just completed.
-
#43
by
kneecaps
on 10 Jun, 2007 16:03
-
Thomas ESA - 10/6/2007 5:00 PM
Did anyone at NASA become concerned about RPM? It must have seemed risky in simulations with the orbiter losing sight of its target?
I don't see that it was of any concern for target sighting. The orbiter could spin about all day there (if it wasn't closing in on the station) and know EXACTLY where to turn to to resight the station.
-
#44
by
psloss
on 10 Jun, 2007 16:05
-
kneecaps - 10/6/2007 12:03 PM
Thomas ESA - 10/6/2007 5:00 PM
Did anyone at NASA become concerned about RPM? It must have seemed risky in simulations with the orbiter losing sight of its target?
I don't see that it was of any concern for target sighting. The orbiter could spin about all day there (if it wasn't closing in on the station) and know EXACTLY where to turn to to resight the station.
Actually, that's almost exactly how I recall someone expressing the concern...just can't recall who...
-
#45
by
kneecaps
on 10 Jun, 2007 16:08
-
The NCC RCS burn is completed by the commander or pilot making manual inputs to the THC (Translation Hand Controller). Whereas the OMS burns are under computer control.
-
#46
by
Chris Bergin
on 10 Jun, 2007 16:10
-
-
#47
by
kneecaps
on 10 Jun, 2007 16:11
-
RENDEZVOUS PRPLT PAD just copied up to Atlantis. Information of note. No Lo Z permitted when L or R RCS QTY < 55 or FRCS QTY < 17
-
#48
by
Felix
on 10 Jun, 2007 16:17
-
Good NCC burn. No trim required
-
#49
by
Do Shuttles Dream
on 10 Jun, 2007 16:26
-
I would post this in Shuttle Q&A but it's happening now and others may want to know. Orbiter is whizzing around the world, faster than the ISS, so catching up. So are all these burns slowing down the approach speed in stages?
-
#50
by
DaveS
on 10 Jun, 2007 16:28
-
Do Shuttles Dream - 10/6/2007 6:26 PM
I would post this in Shuttle Q&A but it's happening now and others may want to know. Orbiter is whizzing around the world, faster than the ISS, so catching up. So are all these burns slowing down the approach speed in stages?
Yes. Simple orbital mechanics. The higher the orbit, the slower you travel. This is how satellites in GEO appear fixed in the sky, they're in an orbit where the velocity relative to Earth is almost non-existant.
-
#51
by
kneecaps
on 10 Jun, 2007 16:37
-
MS2 configuring the KU antenna to incorporate its data into rendezvous guidance. PLT will be performing the Ti burn intermediate targeting procedures.
-
#52
by
Ford Mustang
on 10 Jun, 2007 16:40
-
NCC Burn Replay (Finally caught it, after two times..)
-
#53
by
Felix
on 10 Jun, 2007 16:41
-
Go for TI
-
#54
by
Chris Bergin
on 10 Jun, 2007 16:44
-
Beautiful shot of Altantis in the distance:
-
#55
by
Ford Mustang
on 10 Jun, 2007 16:45
-
Another wonderful shot off the ISS at the Earth and Atlantis
-
#56
by
kneecaps
on 10 Jun, 2007 16:46
-
PLT just completed final Ti burn targeting. MCC give a go to burn the onboard calculated solution.
-
#57
by
psloss
on 10 Jun, 2007 16:47
-
As PAO Kylie Clem just noted, the burn will be done with the left OMS engine; delta-V is 9.6 fps, duration is 12 seconds.
-
#58
by
Ford Mustang
on 10 Jun, 2007 16:49
-
Atlantis getting closer, you can start to see the shape of her from the ISS:
-
#59
by
Tony T. Harris
on 10 Jun, 2007 16:50
-
psloss - 10/6/2007 11:05 AM
kneecaps - 10/6/2007 12:03 PM
Thomas ESA - 10/6/2007 5:00 PM
Did anyone at NASA become concerned about RPM? It must have seemed risky in simulations with the orbiter losing sight of its target?
I don't see that it was of any concern for target sighting. The orbiter could spin about all day there (if it wasn't closing in on the station) and know EXACTLY where to turn to to resight the station.
Actually, that's almost exactly how I recall someone expressing the concern...just can't recall who...
Shuttle orbiter is a very flexible vehicle on orbit with the constants. I wouldn't of seen justification in now allowing for this RPM based on how it's executed.
