TEGA - Round 2 |
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TEGA - Round 2 |
  Aug 21 2008, 09:44 AM
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#181
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 Junior Member  Group: Members Posts: 44 Joined: 25-February 08 From: Greece, Komotini Member No.: 4055  |
I think it`s unsuccessful. I can`t see any soil on the TEGA oven #7.
-------------------- "It`s one small step for a man. A giant leap for all mankind!" Armstrong, Apollo 11, 1969.
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Aug 21 2008, 07:52 PM
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#182
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 Member Group: Members Posts: 646 Joined: 23-December 05 From: Forest of Dean Member No.: 617 |
Looks like a direct hit to me; there's plenty of sample on the, um, "lintel" areas above the doors. None showing on the screen, but they've a lot more practice with the sprinkle technique, and with vibrating the sample material down into the instrument, than was the case with the first couple of ovens.
-------------------- --
Viva software libre! |
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Aug 21 2008, 09:27 PM
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#183
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 Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
QUOTE (Ipparchus @ Aug 21 2008, 05:44 AM)  I think it`s unsuccessful. I can`t see any soil on the TEGA oven #7. The optimistic view would be that all the soil that dropped on the screen went straight through to the oven. |
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Aug 21 2008, 11:56 PM
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#184
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 Member Group: Members Posts: 101 Joined: 29-January 06 Member No.: 667 |
JPL Phoenix Mission News: Mid-Depth Soil Collected for Lab Test On NASA's Mars Lander
QUOTE Data received from Phoenix early Thursday confirmed that the arm had delivered some of that sample through the doors of cell 7 on the lander's Thermal and Evolved Gas Analyzer (TEGA) and that enough material passed through a screen and down a funnel to nearly fill the cell's tiny oven. The Phoenix team prepared commands Thursday to have TEGA close the oven and begin heating the sample to low temperature (35 degrees Celsius, or 95 degrees Fahrenheit). Cook it. |
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Aug 25 2008, 08:02 PM
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#185
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Member Group: Members Posts: 101 Joined: 29-January 06 Member No.: 667 |
Anyone know why they did a TEGA oven #0 delivery pose on Sol 89? They did a delivery on or about Sol 64; I think it was Witch's Hat -- the sample with just a bit of ice in it.
Sol 64 oven #0 delivery pose:  Sol 89 oven #0 delivery pose: 
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Aug 30 2008, 05:16 PM
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#186
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Member Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 |
Looks like a delivery practise run over oven 0 was performed tosol, as described by Emily in her blog. Looks to me some stuff fell through to the (closed) oven. But was it an icey sample? I can't see ice rasping being perfomed in tosol's images.
-------------------- Antti Kuosmanen
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Sep 1 2008, 05:08 PM
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#187
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Member Group: Members Posts: 101 Joined: 29-January 06 Member No.: 667 |
Sol 96 Raw Images
TEGA Oven #1 opened: one door fully, one door partially.  And scoop also imaged near open door. Can't tell if it's a delivery or a pose for practice. Edit: With later images, it appears the scoop of soil went to MECA WCL, probably from Stone Soup. When the scoop was near TEGA, I'm pretty sure it was empty. It was later afternoon, so wouldn't have been a cold time for an icy TEGA delivery anyway. |
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Sep 1 2008, 07:46 PM
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#188
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Member Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 |
Very nice to see a fully opened door
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-------------------- Antti Kuosmanen
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Sep 4 2008, 03:41 PM
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#189
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 Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
Fresh ice exposed in the trench “Dodo-Goldilock”. Preparation for collecting sample of ice for TEGA oven #1 ?
-------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Sep 4 2008, 05:50 PM
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#190
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
Nice! Let's hope so.
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Sep 18 2008, 11:44 PM
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#191
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Member Group: Members Posts: 101 Joined: 29-January 06 Member No.: 667 |
Sol 113 Raw Images document a TEGA #1 delivery of a (hopefully icy) sample from Snow White trench. So far there aren't enough images to tell the whole story. All are probably post-delivery, in which an empty scoop is a good sign -- if it held a sample earlier.
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Sep 20 2008, 05:48 PM
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#192
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 Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
The latest TEGA ice sample got stuck at the screen and didn't make it into the oven, according to Smith at about 22:20 into yesterday's NPR interview (22MB file):
http://podcastdownload.npr.org/anon.npr-po...pr_94836803.mp3 |
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Sep 20 2008, 06:03 PM
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#193
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
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Sep 20 2008, 06:45 PM
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#194
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 Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
I don't know whether to laugh, cry or wonder whether or not there ought to be some kind of investigation into the (what appears to be) serious underperformance of the TEGA itself and the sample delivery system associated with it.
Was it actually not possible to anticipate the clumpiness and stickiness of ice-rich soil? Or was the possibility just not considered? I'm not really criticizing, I'm more in wonderment... it seems an awful lot of time, energy and money to spend to deliver a system to the surface of Mars, sitting directly over Martian ice, which seems incapable of running analyses on said ice...  -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Sep 20 2008, 06:55 PM
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#195
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
QUOTE (dvandorn @ Sep 20 2008, 01:45 PM) Was it actually not possible to anticipate the clumpiness and stickiness of ice-rich soil? It's not clear to me that the ice rich stuff is any stickier than the dry stuff. And as far as I know, the stickiness of the dry stuff remains a complete mystery. It's hard to anticipate mysteries. |
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