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TEGA - Round 2
Paul Fjeld
post Jul 27 2008, 02:25 PM
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I know silver linings are little annoying, but I find this situation kind of exciting. The TEGA is having problems because Mars is NOT "nominal." That's the point. When the design of the scoop (its width) and the TEGA doors were being "fought over" I wonder where the possibilty of "wet" sticky clods was on the "threat matrix." Way the hell off in 3 sigma territory I bet!

So Peter and the whole team land exactly like they expected in a place that was better than they could have expected and the adventure seemed like a tic tac toe: there're the polygons - they're even cute; there's the ice - we land on a skating rink; there's the pH - keep the life-question-ball rolling; there's the ice sample... wait a second - that's not like the Arctic!

Keep fighting Phoenix team - you're having an adventure along with your heart attacks!

Paul
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elakdawalla
post Jul 27 2008, 03:08 PM
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QUOTE (Deimos @ Jul 26 2008, 07:34 PM) *
You left out :

step 2.5) repeat the above 3 times
step 4) ???
step 5) profit!
unsure.gif

biggrin.gif Okay, that was hilarious.

Since this was a somewhat obscure cultural reference, I think I'll have to point some of you readers to the Underpants Gnomes Business Plan...Wikipedia, what would we do without you?

--Emily


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Juramike
post Jul 27 2008, 03:46 PM
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recent space.com article on Phoenix's delivery attempt with a very misleading headline:

"Mars-lander glitch prevents dirt-baking efforts"

As far as I understand, the machinery is working nicely (="nominally"), it's just that Martian soil is not cooperating.

Perhaps a more accurate headline would be:
"Mars stuff is hard"

[/rant]


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dvandorn
post Jul 27 2008, 04:16 PM
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With apologies to all...

"Comedy is easy. Mars is hard."

smile.gif

-the other Doug


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PDP8E
post Jul 27 2008, 05:17 PM
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Attached Image


A young nasa test pilot and an eager JPL engineer working on the scoop fix


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01101001
post Jul 27 2008, 06:20 PM
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QUOTE (BrianL @ Jul 27 2008, 06:10 AM) *
So, if this sample is stuck in there, how are they going to get it out in preparation for the next scoop attempt?


Looks relatively clean in this, sol 61, 1318 local time:

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jmjawors
post Jul 27 2008, 07:01 PM
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Did they empty the scoop onto MECA?

[Image]


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fredk
post Jul 27 2008, 09:29 PM
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QUOTE (jmknapp @ Jul 27 2008, 11:22 AM) *
The way the soil clumps and adheres suggests a fair bit of water, like it's either wet or was wet and froze again--the RASP generates some heat, no?

Apparently yes! From the latest update:
QUOTE
[The] robotic arm will use a revised collection-and-delivery sequence overnight Sunday with the goal of depositing an icy soil sample in the lander’s oven... The revised plan includes reducing the length of time the rasp operates as it makes the holes in the trench to reduce any potential heating of the sample, and for increasing the number of times the scoop is vibrated during the sample delivery action.
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mike
post Jul 27 2008, 09:49 PM
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QUOTE (Paul Fjeld @ Jul 27 2008, 06:25 AM) *
Keep fighting Phoenix team - you're having an adventure along with your heart attacks!


I agree with your entire post. They'll get good results.
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Juramike
post Jul 27 2008, 10:57 PM
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From the update:

QUOTE
NASA's Phoenix Mars Lander’s robotic arm will use a revised collection-and-delivery sequence overnight Sunday with the goal of depositing an icy soil sample in the lander’s oven.


OK.

I'm eating peanuts now.


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ElkGroveDan
post Jul 28 2008, 12:18 AM
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How do they define "overnight Sunday"? MST?


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elakdawalla
post Jul 28 2008, 03:06 AM
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I am virtually certain that they mean "overnight Sunday" Arizona/Pasadena time, which means sol 62, that is, tosol.

Parenthetically: for those of you not familiar with the peculiarities of the federalism that complicates timekeeping in America, the state of Arizona, from which the Phoenix mission is operated, is typically one hour ahead of California, as it is in the Mountain (GMT-7) time zone, while California is in the Pacific (GMT-8) time zone. However, Arizona is one of the two American states (the other is Hawaii, the erstwhile recalcitrant portions of Indiana having chosen to participate as of 2005) that does not observe Daylight Saving Time, with the result that half of the year (including now), Arizona and California are both on the same clock. Unless, that is, you are in a Navajo or other Native American reservation -- which comprises a HUGE portion of the parts of Arizona that a tourist is likely to visit in the summer -- in which case you are an hour ahead of California. God bless America. rolleyes.gif

--Emily


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fredk
post Jul 28 2008, 03:11 AM
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As far as heating of the scoop goes, does anyone know if there are heaters in the scoop joints or rasp mechanism? If so, could significant heat conduct through the scoop walls to the back of the scoop where the rasp shavings go? I don't suppose there's too much they could do about that, if the heating is required...
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ElkGroveDan
post Jul 28 2008, 03:31 AM
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QUOTE (elakdawalla @ Jul 27 2008, 07:06 PM) *
Parenthetically: for those of you not familiar with the peculiarities of the federalism that complicates timekeeping in America,

Emily nailed it -- and there's one more exception. Malheur County Oregon. The State of Oregon is on Pacific Time and the State of Idaho is on Mountain time. However there is a town called Ontario, Oregon that is more or less a suburb of Boise Idaho. The nearest Oregon cities are 200-300 miles away. So the county of Malheur of which the vast majority of its population is in Ontario, has chosen to keep Idaho time since that where most of the people there work, shop etc. It sounds simple but of course Westerners being Westerners some folks on the Southern border of Malheur County prefer to think of themselves as Oregonians and not Idahoans, the town of Jordan Valley is the only real community in this region, they prefer to affiliate with their neighbors in Nevada. So even Malheur County is split into two time zones.

For those who are keeping track rolleyes.gif


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nprev
post Jul 28 2008, 03:50 AM
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Now that's a fascinating factoid, actually! Had no idea, thanks!

IIRC, Clarke had a short story about a robbery in a city on Mars that was on the Prime Meridian, and the plot revolved around temporal confusion...the title completely escapes me, though. Life in the parts you describe must get kinda complicated at times...(dah dah dah, dah!)


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