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When Phoenix Lands..
climber
post May 24 2008, 11:06 PM
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From Twitter : A small dust storm blew over the landing site today, but now the weather looks clear for landing. 25 hours and 1 million miles til landing


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MahFL
post May 24 2008, 11:39 PM
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Less than 24 hours now..........
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dvandorn
post May 24 2008, 11:45 PM
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Actually, no, it's right now just a touch more than 24 hours to landing.

Landing time tomorrow is 4:53 pm Pacific Daylight Time. PDT is 7 hours behind London time, and two hours behind my time.

So, the landing tomorrow will be at 6:53 pm my time (CDT), and it is 8 minutes until then -- 6:45 -- right now. So, we're 24 hours and eight minutes away... smile.gif

-the other Doug


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dmuller
post May 24 2008, 11:47 PM
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QUOTE (dvandorn @ May 25 2008, 09:45 AM) *
Landing time tomorrow is 4:53 pm Pacific Daylight Time. PDT is 7 hours behind London time, and two hours behind my time.

Well that depends if you are an ERT or SCET kind of guy. In any way, you will be munching peanuts in 24 hours ... either already, or still ...


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MahFL
post May 25 2008, 12:02 AM
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I went by the Phoenix site countdown...........
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gndonald
post May 25 2008, 12:37 AM
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Going by the 'Touchdown' clock on the website Phoenix should reach Mars at approximately 7:40am (+/- 10 min) on the 26th of May 2008 (West Australian) time.
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dvandorn
post May 25 2008, 01:07 AM
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I was calling out the time based on the NASA Phoenix site. So, NASA are ERT kind of guys and Tucson are SCET kind of guys?

Besides, I still insist that nothing occurs until someone is aware of it... rolleyes.gif

-the other Doug


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climber
post May 25 2008, 02:14 AM
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QUOTE (dvandorn @ May 25 2008, 03:07 AM) *
Besides, I still insist that nothing occurs until someone is aware of it... rolleyes.gif
-the other Doug

So, you don't beleive in Martian beings ?


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climber
post May 25 2008, 03:15 AM
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Good news from Twitter : Navigation is looking good. Yay!! Team waived off tonight's opportunity for a flight path adjustment. May do one tomorrow am if needed


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Tman
post May 25 2008, 08:24 AM
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Great job guys!

QUOTE (Stu @ May 24 2008, 07:32 PM) *
For those who haven't seen it yet, Emily has a link to an excellent NASA TV portal site on the TPS Blog... very high quality... I've just been watching some great footage shot onboard ISS...

Afraid that the streaming quality could suffer from too many users unsure.gif rolleyes.gif I will make no secret of it - There's a site from a nice guy (Neil Walker) that provides NASA TV up to 1200 kbits (or 2300 by using Microsoft Silverlight).

http://www.neil-online.com/nasa/

Maybe some nice e-mails to him could help to keep that great site/service alive for a long time.


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Stu
post May 25 2008, 08:42 AM
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QUOTE (Tman @ May 25 2008, 09:24 AM) *
There's a site from a nice guy (Neil Walker) that provides NASA TV up to 1200 kbits (or 2300 by using Microsoft Silverlight).


Wow, that IS good quality... thanks for the heads-up.

Off out to buy some peanuts now. I forgot four times yestetrday!!!


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climber
post May 25 2008, 08:57 AM
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QUOTE (Stu @ May 25 2008, 10:42 AM) *
Off out to buy some peanuts now. I forgot four times yestetrday!!!

I'm already eating right now!
Good you're there Stu, I felt was left alone for over two hours (Tman's there too now) on UMSF mad.gif
GO PHOENIX and don't forget the Cacahuètes this time


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imipak
post May 25 2008, 09:06 AM
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oDoug - I'm working on the times given on dmuller's realtime simulation page for spacecraft event time and earth received time:

EDL interface (s/c time): 23:31
touchdown(s/c time): 23:38
EDL (Earth time): 23:46
touchdown (Earth time): 23:53

Phoenix is perceiving those events, so there IS an observer[1]. So, will you really not be thinking about anything different at 23:31? Confess! ;p

[1] (semi-seriously) -- what counts as an observer?


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dmuller
post May 25 2008, 09:39 AM
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QUOTE (imipak @ May 25 2008, 07:06 PM) *
[1] (semi-seriously) -- what counts as an observer?

Anything and everybody (every human, particle, planet ...) is an observer. So for Phoenix the landing happens at 23:38. So does it for Mars or any Martians watching. For the Sun the landing is perceived as happening at 23:52. Earth 23:53 etc. No piece of information can travel faster than light (not sure about the story of gravity 'information' and gravity waves, since that forms the space-time itself). So that's what relativity says.

Of course, once it happened on Mars, it will irreversably get to be perceived on Earth (unless the Universe ends in the meantime), so on a philospohical 'sphere' you can follow SCET or ERT. Or be like me, I follow both, so I can watch it twice!

Daniel


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Stu
post May 25 2008, 09:55 AM
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My head hurts...

How would you explain it, Doctor?

Ah. Got it now. Thanks! smile.gif


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