Phoenix Mars Lander To Touch Down In 2 Hours

AFP has a good summary of the pre-touchdown jitters the Phoenix Mars Lander crew is living through. The spacecraft has been under way for 10 months. If the landing goes according to plan — and only about half of the three dozen such attempts have — mission controllers at the University of Arizona will receive radio signals from the Martian surface at 23:53 GMT. Here's the Mars mission home. You can (in theory) track the lander here, but at the moment the JPL Solar System Simulator is "experiencing technical difficulties."

oh sure

[compro01 (777531)]

As if they don't have enough to worry about, now we /. them!

Re:oh sure

[LostCluster (625375)]

The site was slashdotted well before the story was posted for subscribers... nice try JPL, but you'll have to do more to get through a Memorial Day Weekend slashdotting.

geeky video here

[by Anonymous Coward]

http://www.jpl.nasa.gov/videos/phoenix/phx20080327/

no photos, planet not available at this time

[spazdor (902907)]

Way to go guys, we slashdotted Mars!

Re:no photos, planet not available at this time

[LostCluster (625375)]

I think the interplanetary cable got severed when it got run through the Sun.

I wonder

[Daimanta (1140543)]

Is that Imperial hours or metric hours?

Re:

[Kjella (173770)]

Technically (yes, I know you're joking) there's no metric hour since the SI unit is a second and anything else should be described as kiloseconds etc. using prefixes, while the imperial system never made any rules like that. In fact, they tended to have a ton of oddly named units with various conversion factors so if you had to choose I'd say it's an imperial hour. That said, the hour is recognized in all metric countries as 3600 seconds just like we measure temperature in degrees celsius rather than kelvin

Re:

[Tango42 (662363)]

Please, wait until it's down before you joke... it's too painful...

Re:I wonder

[Tango42 (662363)]

Oh, I have no doubt it will land - Newton hasn't failed us yet. I'm just concerned about how many pieces it will be in afterwards...

(I say that - what do you think the odds are of them missing Mars entirely? That would be pretty impressive, especially at this late stage...)

Re:I wonder

[Kjella (173770)]

(I say that - what do you think the odds are of them missing Mars entirely? That would be pretty impressive, especially at this late stage...)

Well from what I've understood you don't want to hit a planet dead on, you actually aim for the edge so you have a long burn "sideways" in the athmosphere to slow you down. There's actually a fairly small approach angle, come in too steep and you'll hit the ground at too high speed, but come in too flat and you'll bounce off the athmosphere and continue out into space again. So it's not quite so unlikely as you might think, not that I have any odds to give you but with a thruster malfunction in early stages of decent it can happen.

Re:

[servognome (738846)]

I'd assume even if it bounced off it probably wouldn't have the momentum to escape Mars' gravity completely, so it would still land... just later than planned.

A better link for full JPL/Phoenix coverage

[Mc_Anthony (181237)]

Hello from JPL...

Best place to go for coverage including links to NASA TV (live video starts at 3:30pm PDT is... http://www.jpl.nasa.gov/phoenix [nasa.gov].

Wish us luck!

NASA TV link...

[Sensible Clod (771142)]

http://www.nasa.gov/multimedia/nasatv/ [nasa.gov]

Direct Links to NASA TV

[Graftweed (742763)]

I ran into problems getting the NASA TV streams to work under Firefox in Linux. Here are the direct links if you're in the same boat or don't want to go through javascript infested pages. I only tested the Windows Media one.

Windows Media [nasa.gov]

Real Media [nasa.gov]

Quicktime [nasa.gov]

Re:A better link for full JPL/Phoenix coverage

[CopaceticOpus (965603)]

The broadcast feels like a mix between a science lecture and coverage of a sporting event, which is pretty neat. As in sports, I'm cheering on the efforts of supremely talented people to score a goal. Rather than a football in an end zone, it's a lander on the northern plains of Mars. The difference here is that victory will actually mean something for mankind.

Go Earth! Get those Martians!

Re:

[servognome (738846)]

Does that mean if the lander crashes nerds everywhere will take to the streets and riot against that damn referee called physics.

Re:

[coastwalker (307620)]

Best of luck from Plymouth UK, go find us some water ice!

Re:

[mutube (981006)]

Best of luck from Birmingham, UK - staying up late here to watch this one in. Appreciate all the effort put into this and hope you get the good news you deserve!

Re:

[RealSurreal (620564)]

Thanks for the link but shouldn't you be concentrating on landing the probe instead of surfing Slashdot?

Re:A better link for full JPL/Phoenix coverage

[Danathar (267989)]

yea, and their streaming video pretty much sucks. In a world where braodband has been around for 10 years NASA TV on the Web is Marginal quality on Windows Media only, or crappy low bandwidth with everything else (they don't even use H.264 for quicktime which is a super small bandwidth link).

Hell, they COULD provide a high-def multicast feed to Internet2 since they peer with it and don't (you would think that researchers and universities would be interested).

How hard is it to multicast a feed to I2? I could to it with cheap equipment in under a half hour. Scaling? Use Source Specific Multicast.

Sorry for the rant, but if you have VLC and are connected to I2 watch what is being broadcast via SAP announcements. The Europeans have been multicasting hi-def content (boring legislature sessions) for YEARS yet NASA is clueless.

Re:

[antdude (79039)]

Question: Is there a HD feed on broadcast (over the air/OTA) or online?

Re:

[mutube (981006)]

Congratulations, nicely done!

Thing to note

[Auckerman (223266)]

Nasa has pointed out to news agencies that only 5 of the 13 previous landings have been successful. Odds are, as always, this is not going to work. As slow as this science goes, taking several years from start of the project to a result, that a whole lot of pressure. The two most dangerous parts of this trip are the take off and landing. It's "easy" to adjust the craft when it's moving over 10 months in space, here we have a 7 minute fall from 12,000 mph to 5 mph. A LOT can go wrong.

Here's to hoping we learn something about Mars again. If not, as always, we need to keep trying. If it weren't for these people, things we take for granted in daily life wouldn't exist.

Re:Thing to note

[Tablizer (95088)]

Nasa has pointed out to news agencies that only 5 of the 13 previous landings have been successful. Odds are, as always, this is not going to work.

The vast majority of US *landing* attempts have been successful. In fact, only the Mars Polar Lander failed. That's one. And this craft has been heavily tested to avoid the same fate (because its using similar technology as the Polar Lander).
     

Re:

[Kjella (173770)]

Nasa has pointed out to news agencies that only 5 of the 13 previous landings have been successful. Odds are, as always, this is not going to work.

It's not exactly volume enough to break out the confidence interval, but one would hope the odds get better over time. It doesn't take much improvement of past performance (5/13 to 6.5/13) where the first were probably the biggest crapshoots before the odds are that it is going to work.

Watch

[iminplaya (723125)]

live [nasa.gov]

NasaTV on the PS3 ??

[gibodean (224873)]

I want to watch the NasaTv coverage from the UK. I can do it from the NasaTv page on my pc, but it's a small screen, and I want to use my PC for other stuff.

Has anyone ever got http://www.nasa.gov/multimedia/nasatv/ [nasa.gov] to work on a PS3 ? The page comes up ok on my PS3, but the video window just shows a static picture, with no video or audio... I assume the PS3 can't do the flash video required ???

Or, is there any alternate coverage on broadcast TV in the UK ?

Re:

[Sensible Clod (771142)]

It's an MMS stream: mms://209.73.189.79/md2enc039?StreamID=65100640&pl_auth=5df46a2dcfdbf3f286f7fdb5191b70e3&ht=30&pl_b=00CEBE2CA244BE2D935947EFAA4839EB8E&CG_ID=1369080&Segment=149773 [2097318979...ment149773]

Re:

[gibodean (224873)]

What's that URL meant to do for me ? I made a tinyurl of it, and opened that tinyurl up with my PS3, but it just gives an error "The page cannot be displayed. Network error occurred".

(I tinyurl'd the displayed URL, not the dodgy URL which the link actually tries to take you to when you click it. Slashdot is munging the URL)

Thanks.

Re:

[gibodean (224873)]

Doesn't appear to be. I get a black screen "The data is corrupted"... I don't think it will like realplayer either unfortunately.

Re:

[AigariusDebian (721386)]

Thanks, works great in MPlayer!

Live coverage on Science Channel

[AlpineR (32307)]

On the Science Channel, 7-9 PM Eastern Time:

Mars Live: The Phoenix Lands [marsdaily.com]

And I see that my cable company now carries Science Channel HD. Woot!

Well its 6:59pm...

[3seas (184403)]

one hour and counting?

MUCH Better bandwidth (TV quality streaming)

[Danathar (267989)]

Don't watch NASA TV from NASA (it sucks).

This one is at much higher bandwidth.

http://playlist.yahoo.com/makeplaylist.dll?id=1368163 [yahoo.com]

Landing successful

[the_other_chewey (1119125)]

It just touched down - and survived.

(Yeah, I know, 15min ago, gimme some lag ;-)

w00t!

[Lord Ender (156273)]

w00t!

Congratulations!

[stox (131684)]

To the fine folks at NASA, and JPL, for another job well done!

Landed almost perfectly flat

[the_other_chewey (1119125)]

Phoenix' tilt sensor reports it to be sitting on the surface
with a tilt of a quarter of a degree!

This is as close to perfection as it could possibly get.

Buddy's Idea

[WED Fan (911325)]

A buddy of mine once said it would've been cool to put a little mini-web server on the Spirit rover.

Latency aside, can you imagine what would have happened if they had done so and someone posted the URL to /.?

Re:Buddy's Idea

[schnikies79 (788746)]

Alderaan comes to mind.

Re:Buddy's Idea

[Kjella (173770)]

I was thinking a smoldering crateer, but clearly your imagination has a bigger special effects budget.

Re:Buddy's Idea

[strstrep (879828)]

If I remember correctly, Mars is too far away for TCP --- you'll timeout before you can establish the connection. I don't think anybody bothered to implement HTTP over UDP, though there is a port reserved for it.

Re:

[cheater512 (783349)]

A kernel patch can fix that. :)

Re:Buddy's Idea

[Spikeles (972972)]

Here's some light reading for you..
TCP Extensions for Space Communications [psu.edu]
TCP/IP Router for Space Applications [nasa.gov]

Re:

[rubycodez (864176)]

actually, you only need a web server on earth, and feed "live" status from the rover.

Re:Obligatory Hitchhikers quote... Petunias

[coastwalker (307620)]

Oh no.. not again

Re:

[ZeroExistenZ (721849)]

They're detaching the screens now. Get on NASA TV now, and see it live.

In 20mins it's all over.

Re:

[AigariusDebian (721386)]

Touchdown!

Re:

[De Lemming (227104)]

This seems to be corrected now, the timer on the tracking page is adjusted to show the same time as the one on the front page.

Re:Huzzah

[Tablizer (95088)]

I just heard the same on CNN. A "successful land" signal has been received. However, there's still a lot yet that needs to happen, like locks popping off and things unfurling. Cross your fingers.

Let's see if the prediction that there will be big polygonal "tiles" on the surface holds out (based on orbiter photos). It will look like a giant bathroom tile floor with dust and crap if so...