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Old 01-June-2008, 11:09 PM
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Any word on the TEGA malfunction? Is this something that can be bypassed? Also, is this the only way to look for trace elements in the soil? I mean are there alternate experiments that will be able to test what is in the samples?
Planetary Society Weblog: Phoenix sol 5 and 6 activities (sol 7 roundup)

Quote:
They are still working out the problems with TEGA. Dave Spencer said that the TEGA team is pretty confident that the workaround that they have developed will work, and if it doesn't, they have a few other gambits as well. So they are going ahead with other activities that involve TEGA.
I think it's the only tool designed to do what it does. It's a lot of lost data if the problem cannot be worked around. Good thing they sound like there are workaround options.

===

Other items: the monkey foot print image was a scoop press and is called "Yeti" and test dig-and-dump should be attempted today. The rock/ice with dimples is "Snow Queen". No mention of the dimples. The several images were attempts at doing color by the Robot Arm Camera (RAC) but probably not successful (because it does color not with filters but with illumination, which should work in a dark trench but not under the lander).

===

Link me up, Scotty:
NASA Phoenix Mission
University of Arizona Phoenix Mars Mission
JPL Phoenix Mission News
NASA Phoenix Twitter Feed
CSA Phoenix Mars Mission
Planetary Society: Phoenix Mission
Planetary Society Weblog
Emily Lakdawalla Ustream video chat (sporadic)
Google Mars landing site
NASA TV (or NASA TV, Yahoo! source)
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Last edited by 01101001; 02-June-2008 at 01:45 AM.
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  #212 (permalink)  
Old 01-June-2008, 11:29 PM
RGClark RGClark is offline
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Was the -30C maximum temperature taken in the air?
If so, ground temperature could be higher than that.
Does Phoenix have any ground temperature sensors?

Bob Clark
Last edited by RGClark; 02-June-2008 at 12:53 AM.
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  #213 (permalink)  
Old 02-June-2008, 12:40 AM
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Originally Posted by RGClark View Post
Was the -30C maximum temperature taken in the air?
I expect.

CSA: MET Station – Fast Facts

Quote:
The Meteorological Station has:
  • A mass of 7.5 kg
  • A vertical lidar instrument for probing the atmosphere
  • A mast with
    • Three temperature sensors at various heights
    • A wind sensor known as a "telltale," which measures wind speed and direction from Aarhus University, Denmark
    • A pressure sensor from the Finnish Meteorological Institute
A quick survey of technical papers on the Web seemed to speculate that Phoenix site air temperatures lag ground temperatures by a few degrees K to a bunch (um, maybe 20), and daily maximum air is less than maximum ground.

Edit: For instance, ATMOSPHERIC CHARACTERISTICS EXPECTED AT THE PHOENIX LANDING SEASON AND LOCATION:

Quote:
[...] the ground temperature range is expected to be between 185.2–271.0K. Likewise, the near surface air temperature is expected to be between 189.1–256.7K.
Edit: In the Monday media telecon, someone who was asked about temperatures at different heights informally answered that if you were standing next to Phoenix your head could be about 20 degrees cooler than your feet.
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Last edited by 01101001; 03-June-2008 at 02:46 AM.
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Old 08-June-2008, 03:05 PM
RGClark RGClark is offline
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Thanks for that. That max ground temperature is only 2 degrees below freezing, well within the range to permit liquid water brines.

Bob Clark
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Old 08-June-2008, 04:27 PM
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No thorough coverage of Phoenix early activities would be complete without a quick mention of Steve the Cat.

There. That's probably enough.
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Old 08-June-2008, 04:40 PM
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No thorough coverage of Phoenix early activities would be complete without a quick mention of Steve the Cat.

There. That's probably enough.
You left out the best part:
Quote:
Originally Posted by Steve the Cat
It is the curiosity of cats that has led us to the northern polar region of Mars. As we continue to explore the Universe we will be joined by humans, who will be allowed to feed and pet us.
And he looks so cuuuute in his little space suit!

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  #217 (permalink)  
Old 09-June-2008, 01:49 AM
JonClarke JonClarke is offline
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You left out the best part:And he looks so cuuuute in his little space suit!
Aaawwhhh!

I have often thought a cat would be an ideal companion on a Mars mission.

Jon
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  #218 (permalink)  
Old 09-July-2008, 09:11 PM
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Back in the olden days of Phoenix:

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Originally Posted by 01101001 View Post
The MRO folks have been polishing up the image of Phoenix on parachute in front of Heimdall crater, and they think they might have spotted the heatshield falling away:



And, they colorized what they could:

Phoenix Descent with Color and the Heat Shield in Free-Fall

We now return you to the regular ongoing Phoenix coverage: Phoenix on Mars.
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