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#360
by
TheFallen
on 18 Nov, 2013 18:34
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#361
by
sdsds
on 18 Nov, 2013 18:34
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The display showed negative the radius of the earth in nautical miles, so apparently when you reach escape velocity, it just uses the center of the earth instead of messing with infinities.
The value to start watching at that point (or before) is eccentricity, which is passing through 1.0, as opposed to apogee which is passing through infinity.
So what happens to the Centaur?
It's on a heliocentric trajectory that will miss Mars. Maven will perform trajectory corrections to get "on target."
So incredibly smooth.
Almost like they really know what they're doing.
Congratulations to all involved!
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#362
by
douglas100
on 18 Nov, 2013 18:38
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That was great. Congratulations to ULA and another successful Atlas launch!
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#363
by
Jim
on 18 Nov, 2013 18:44
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Jim, doesn't it also help force the cryogenic propellant toward the bottom of their tanks? I thought prop settling referred to that
I think he was referring RCS firings during main engine burn vs the prop settling burns
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#364
by
AJA
on 18 Nov, 2013 18:45
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#365
by
Star One
on 18 Nov, 2013 18:45
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The display showed negative the radius of the earth in nautical miles, so apparently when you reach escape velocity, it just uses the center of the earth instead of messing with infinities.
The value to start watching at that point (or before) is eccentricity, which is passing through 1.0, as opposed to apogee which is passing through infinity.
So what happens to the Centaur?
It's on a heliocentric trajectory that will miss Mars. Maven will perform trajectory corrections to get "on target."
So incredibly smooth.
Almost like they really know what they're doing.
Congratulations to all involved!
Will all these stages in Heliocentric orbit just keep going on & on unless they hit something in the meantime?
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#366
by
BrightLight
on 18 Nov, 2013 18:46
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97.5%
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#367
by
Jim
on 18 Nov, 2013 18:47
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Perhaps related, why the nearly 6 minute delay between Rl-10 burn number 2 and spacecraft sep?
To let the stage settled down and to get into the proper attitude.
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#368
by
Lars_J
on 18 Nov, 2013 18:47
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Jim, doesn't it also help force the cryogenic propellant toward the bottom of their tanks? I thought prop settling referred to that
I think he was referring RCS firings during main engine burn vs the pro settling burns
Yes I was - thanks for the answer.
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#369
by
Star One
on 18 Nov, 2013 18:48
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#370
by
Antares
on 18 Nov, 2013 18:48
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did I hear the burn went 4 seconds long?
Yes heard that as well.
Not too big of a deal as long as the target injection was met. Less of a deal if it was just a thrust problem with good Isp (low flow, minor gravity losses). More of a deal if the Isp was low as that means propellant reserves were eaten into.
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#371
by
Jim
on 18 Nov, 2013 18:48
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Will all these stages in Heliocentric orbit just keep going on & on unless they hit something in the meantime?
yep
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#372
by
Targeteer
on 18 Nov, 2013 18:49
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NASA_LSP @NASA_LSP 18s
Spacecraft batteries are charging #MAVEN (NASA Integration Engineer reported to NASA Chief Engineer)
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#373
by
Star One
on 18 Nov, 2013 18:50
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Will all these stages in Heliocentric orbit just keep going on & on unless they hit something in the meantime?
yep
Is it possible to track them, I just wondered if there was any science to be had from studying the stages in this kind of orbit?
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#374
by
Targeteer
on 18 Nov, 2013 18:53
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did I hear the burn went 4 seconds long?
Yes heard that as well.
Not too big of a deal as long as the target injection was met. Less of a deal if it was just a thrust problem with good Isp (low flow, minor gravity losses). More of a deal if the Isp was low as that means propellant reserves were eaten into.
There was mention early in the second burn of a mixture issue (O2 I think) which was corrected so maybe there was a performance loss that had to be made up?
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#375
by
Targeteer
on 18 Nov, 2013 18:55
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NASA_LSP @NASA_LSP 14s
#MAVEN reports a good solar array deploy
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#376
by
Targeteer
on 18 Nov, 2013 18:56
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Charlie Bolden congratulating the team on the NASA TV feed
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#377
by
AJA
on 18 Nov, 2013 18:57
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Is it possible to track them, I just wondered if there was any science to be had from studying the stages in this kind of orbit?
Higher albedo, as well as closer than the Asteroid belt. So, yeah, I'd assume you can track them. (Might be too small though) qualify as NEOs. Science? There's always something
Bolden on the loop?!
Talking to the FICRs
Complimenting the team for being on team and on schedule, and saying that they've set a standard for future missions to imitate.
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#378
by
JimO
on 18 Nov, 2013 19:04
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Where can I find the initial ground track that shows where over the ground the Centaur-2 burn occurred? I do want to get ahead of youtube UFO reports.
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#379
by
belegor
on 18 Nov, 2013 19:08
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Talking to the FICRs