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MahFL
Posted on: Feb 14 2011, 12:27 PM


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I know, just being lazy, also I don't actually frequent the nasa site much, and would have had to guess where the tv schedule was......

Bottom line is it's on too late for me....I need to be zzzzzzzzz at 11:30 EST. Oh well.
  Forum: Cometary and Asteroid Missions · Post Preview: #170570 · Replies: 247 · Views: 287244

MahFL
Posted on: Feb 14 2011, 12:10 PM


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What time does the NASA tv coverage start ?
  Forum: Cometary and Asteroid Missions · Post Preview: #170568 · Replies: 247 · Views: 287244

MahFL
Posted on: Feb 11 2011, 11:25 AM


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Stardust NExT 'Live' module is up and running on Eyes on the Solar System.
  Forum: Cometary and Asteroid Missions · Post Preview: #170497 · Replies: 247 · Views: 287244

MahFL
Posted on: Feb 10 2011, 12:55 AM


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QUOTE (djellison @ Feb 8 2011, 03:59 PM) *
So your point of post 178 was.....?


I was just pointing out that the forces on bouncing were not 40 G but a relatively benign 3 or 4 G's. That was probably due to the excellent performance and timing of the of the retro rockets. So in future it might be argued that airbags work well, within the limits of thier design. Of course there is always going to be a day when your not so lucky.
  Forum: MSL · Post Preview: #170441 · Replies: 414 · Views: 203792

MahFL
Posted on: Feb 10 2011, 12:47 AM


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QUOTE (Gsnorgathon @ Feb 9 2011, 10:35 PM) *
Doug, you just freakin' made my freakin' day. Really. Thank you.



I just noticed it too. Cool.
  Forum: Forum News · Post Preview: #170440 · Replies: 199 · Views: 445799

MahFL
Posted on: Feb 8 2011, 11:21 AM


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QUOTE (djellison @ Feb 7 2011, 03:54 PM) *
Those low G forces were unexpectedly at the soft end of a bell curve that extended to 40G. You have to design with the 40G in mind, because next time you might not be so lucky on the combined performance of chute / airbags / radar / surface / wind etc.

The MSL landing technique reduces the size of that bell-curve drastically.


I know you have to design with 40 G in mind, cause if it went to 4 G's and broke, you'd be kicking yourself in the backside for ever.
Also NASA HQ would not accept 4 G........
  Forum: MSL · Post Preview: #170370 · Replies: 414 · Views: 203792

MahFL
Posted on: Feb 7 2011, 02:53 PM


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QUOTE (nprev @ Feb 3 2011, 02:24 AM) *
....The advantages are the ability to land a much heavier load than what is possible with airbags, plus spare the payload the shocks of bouncing (which are pretty rough, BTW...on the order of 40g's.)...


I seem to recall the landing shock of the MER's was only 1 or 2 G's as per the engineering assesment. I believe everything was tested to 40 or so G's but the landing profile was not meant to impart that much force.
On second thoughts I might be getting mixed up with Phoenix Lander, which touched drown pretty softly....



  Forum: MSL · Post Preview: #170325 · Replies: 414 · Views: 203792

MahFL
Posted on: Jan 31 2011, 12:40 PM


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Yawn...that peice has enough, "proberblies, coulds, don't knows, virtualy no", to make it a waste of time reading.
  Forum: MSL · Post Preview: #170078 · Replies: 414 · Views: 203792

MahFL
Posted on: Jan 20 2011, 11:38 AM


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It would have been more embarassing to have samples and a non built clean room back on Earth......
  Forum: Venus · Post Preview: #169781 · Replies: 736 · Views: 1262518

MahFL
Posted on: Dec 27 2010, 02:32 PM


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I wonder what the preliminary analysis consisted of ?
  Forum: Cometary and Asteroid Missions · Post Preview: #168709 · Replies: 258 · Views: 304493

MahFL
Posted on: Dec 27 2010, 02:29 PM


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Thats odd, having a one time operation valve, not reversable by a command.
  Forum: Venus · Post Preview: #168708 · Replies: 736 · Views: 1262518

MahFL
Posted on: Dec 23 2010, 02:00 PM


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Have any of the original core mission team died ?
  Forum: New Horizons · Post Preview: #168589 · Replies: 1628 · Views: 1114094

MahFL
Posted on: Dec 13 2010, 02:57 PM


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From the BBC....
"The Geminids consist of tiny particles ranging in size from a grain of sand to a pea shed by 3200 Phaethon, an object thought to be an extinct comet."

If only they would check thier facts before publishing.....shame. For those that don't know, it's an extint asteroid not comet.

  Forum: Chit Chat · Post Preview: #167918 · Replies: 549 · Views: 459727

MahFL
Posted on: Dec 13 2010, 02:31 PM


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Well if you look at a rainforest from the air it looks mostly boring old green.........
  Forum: Lunar Exploration · Post Preview: #167915 · Replies: 6 · Views: 26280

MahFL
Posted on: Dec 8 2010, 12:54 PM


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QUOTE (marsbug @ Dec 8 2010, 12:07 PM) *
....it seems a shame to throw a healthy spacecraft away.



Not 100 % healthy though, as it did not make orbit.....
  Forum: Venus · Post Preview: #167641 · Replies: 736 · Views: 1262518

MahFL
Posted on: Dec 2 2010, 02:12 PM


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The old saying "hit it with a hammer" comes to mind...... :rolleyes
Needless to say a 1 million yen hammer.........
  Forum: Cometary and Asteroid Missions · Post Preview: #167314 · Replies: 258 · Views: 304493

MahFL
Posted on: Nov 23 2010, 05:55 PM


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It looks like a mini Victoria, nothing new....., drive right on by it !
  Forum: Opportunity · Post Preview: #166963 · Replies: 548 · Views: 280127

MahFL
Posted on: Nov 19 2010, 05:27 PM


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The pyro is a small explosive, it pushes a sharp shear edge to cut the cables. Remember if they were not cut the rover would have been a lander, so the system have to be very very reliable.


http://exploration.nasa.gov/documents/repo..._From_Pyros.pdf

I had never seen that before....boom !
  Forum: Mars · Post Preview: #166843 · Replies: 466 · Views: 366856

MahFL
Posted on: Nov 4 2010, 01:41 PM


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When will the pictures be sent back ?
  Forum: Cometary and Asteroid Missions · Post Preview: #166150 · Replies: 378 · Views: 339596

MahFL
Posted on: Nov 4 2010, 12:16 PM


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I installed the Eyes on the Solar System s/w at work tongue.gif.

Watches over shoulder for bosses........ unsure.gif
  Forum: Cometary and Asteroid Missions · Post Preview: #166144 · Replies: 378 · Views: 339596

MahFL
Posted on: Sep 24 2010, 12:36 PM


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I was indeed referring to the red straps in the clean room, I saw 2 of them.
  Forum: MSL · Post Preview: #164477 · Replies: 414 · Views: 203792

MahFL
Posted on: Sep 23 2010, 11:18 AM


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Wow they have some big wheel tie downs on Curiosity.
  Forum: MSL · Post Preview: #164432 · Replies: 414 · Views: 203792

MahFL
Posted on: Aug 23 2010, 01:24 PM


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Truely amazing.
  Forum: Image Processing Techniques · Post Preview: #163404 · Replies: 5 · Views: 7102

MahFL
Posted on: Aug 20 2010, 04:25 PM


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QUOTE (Lunik9 @ Aug 20 2010, 04:41 PM) *
What would the one-way signal delay time be at Pluto, which will always be 5 billion kilometers away?
blink.gif


Pluto's orbit is elliptical.

"Light takes between from 4.1 hours and 6.8 hours to travel from the Sun to Pluto" depending on the orbital position of Pluto.
  Forum: New Horizons · Post Preview: #163312 · Replies: 211 · Views: 277886

MahFL
Posted on: Aug 13 2010, 01:59 PM


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The trick of course is to have the intact wheels still attatched to a 100 % functioning rover smile.gif .
  Forum: MSL · Post Preview: #163151 · Replies: 177 · Views: 205349

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