Author Topic: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION  (Read 633907 times)

Offline Space Pete

One thing to keep an eye on is the two SIGIs (Space Integrated GPS/INS), since both of those being operational is a LCC (Launch Commit Criteria) for a Dragon launch, and one of the SIGIs failed close to the previous Dragon launch. Dragon uses the SIGIs for RGPS (Relative GPS) navigation with the ISS.

You can keep track of the two SIGI's status on ISSLive! here, where they are noted as GPS-1 and GPS-2. Their nominal state is "DOING POSIT".
http://spacestationlive.jsc.nasa.gov/displays/adcoDisplay4.html

Just an update, but the SIGIs look like they're holding up!

So that's in violation of the old engineering rule "If anything can go wrong, it will do so at the most inopportune time". ;)
« Last Edit: 10/07/2012 07:22 pm by Space Pete »
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Offline Space Pete

L-6 hours, so the most inopportune times are still ahead.

After the scrub, we can look back at this post as the moment Pete jinxed it. :)

*Disclaimer: Pete reserves the right not to be held liable for any Dragon launch scrubs due to SIGI failure(s). :D
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Offline Space Pete

L-6 hours, so the most inopportune times are still ahead.

L-1h 15m, and they're still going strong.

Come on, little SIGIs! :D
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Offline simonbp

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #323 on: 10/07/2012 11:37 pm »
Down to 20% unfavorable!

Offline Space Man Spiff

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #324 on: 10/07/2012 11:40 pm »
Is this an instantaneous launch window, or could they recycle?

Online Chris Bergin

Is this an instantaneous launch window, or could they recycle?

Instant.
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Offline Jason1701

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #326 on: 10/07/2012 11:43 pm »
Is this an instantaneous launch window, or could they recycle?

It's short enough that they can't recycle in time after a hold, so effectively instantaneous.

Offline krytek

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #327 on: 10/08/2012 12:16 am »
Any idea whose the dragon catcher this time?
*edit* Never mind, they just answered it. It's Sunita Williams and Akihiko Hoshide.
« Last Edit: 10/08/2012 12:26 am by krytek »

Offline Space Pete

L-6 hours, so the most inopportune times are still ahead.

After the scrub, we can look back at this post as the moment Pete jinxed it. :)

Well, those SIGIs held up! They must have got the good vibes I sent them. ;D
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Offline AS-503

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #329 on: 10/08/2012 01:10 am »
Why did the second stage roll control thruster only fire (repeatedly) in one direction?

Normally you see it burn aprox. equally amount of times (about 45 degrees left/right).

Any thoughts?
 
« Last Edit: 10/08/2012 01:11 am by AS-503 »

Offline QuantumG

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #330 on: 10/08/2012 01:11 am »
Why did the roll control thruster only fire (repeatedly) in one direction?

Normally you see it burn aprox. equally amount of times (about 45 degrees left/right).

Any thoughts?

Gwynne said in the preflight press conference that they're going to a different orbit this time.
Human spaceflight is basically just LARPing now.

Offline krytek

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #331 on: 10/08/2012 01:13 am »
Anyone knows why Falcon's engines shine in the form of a six pointed star?

Offline Robotbeat

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #332 on: 10/08/2012 01:17 am »
Anyone knows why Falcon's engines shine in the form of a six pointed star?
That is an artifact from the camera (diffraction about a hexagonal aperture).
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Offline JBF

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #333 on: 10/08/2012 01:17 am »
do we have a timeline for the orbcomm deployment?
"In principle, rocket engines are simple, but thatís the last place rocket engines are ever simple." Jeff Bezos

Offline QuantumG

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #334 on: 10/08/2012 01:19 am »
do we have a timeline for the orbcomm deployment?

I've not seen anything reliable about it at all.

Human spaceflight is basically just LARPing now.

Offline Robotbeat

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #335 on: 10/08/2012 01:21 am »
do we have a timeline for the orbcomm deployment?

I've not seen anything reliable about it at all.


It is supposed to happen at 937pm et, so in about 15 minutes.
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

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Offline krytek

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #336 on: 10/08/2012 01:28 am »
Anyone knows why Falcon's engines shine in the form of a six pointed star?
That is an artifact from the camera (diffraction about a hexagonal aperture).
i.e lens flare. Thank you. 

Offline Robotbeat

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #337 on: 10/08/2012 01:35 am »
Anyone knows why Falcon's engines shine in the form of a six pointed star?
That is an artifact from the camera (diffraction about a hexagonal aperture).
i.e lens flare. Thank you. 
Not caused by lenses, really. ;) caused by the shape of the aperture iris.
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Offline corrodedNut

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #338 on: 10/08/2012 01:42 am »
"Corner"? Something seems to disintegrate right at +1:20. MaxQ, "vehicle is supersonic" then poof. Looks too rough to be a shock ring type effect.


Offline StephenB

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Re: SpaceX Falcon 9/Dragon CRS SpX-1 MISSION GENERAL DISCUSSION
« Reply #339 on: 10/08/2012 01:43 am »
Wow. Fortunately the first stage seems to have been robust enough.

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