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USTRAX! Here is your Abyss.
tasp
post Mar 18 2007, 01:46 PM
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An examination of broken stalagmites and stalactites might generate information on past marsquakes.

Might be an interesting line of inquiry.
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nprev
post Mar 18 2007, 03:52 PM
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Agreed...would love to see cross-sections of same!

Can you imagine sending a rover into one of these? Talk about autonomous nav...the PI would be biting his or her nails down to the elbow until it finally emerged & called home... blink.gif


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edstrick
post Mar 19 2007, 09:19 AM
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http://www.stoneaerospace.com is getting ready to send the Depthx submersible robot to autonomously map and navigate in realtime from the map, the ?world's? deepest cenote/solution spring.

Stone also wants to go to the moon...commercially.
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ustrax
post Mar 19 2007, 10:22 AM
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QUOTE (Marslauncher @ Mar 17 2007, 09:58 AM) *
Scientists studying pictures from Nasa's Odyssey spacecraft have spotted what they think may be seven caves on the surface of Mars.


Better someone innoculate Glen Cushing with that anti-Ultreya vaccine... tongue.gif


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helvick
post Mar 19 2007, 10:36 AM
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Bill Stone is definitely a man to keep an eye on. He wowed the audience at TED 2007 with his plan for a manned exploration mission to Shackleton crater equipped with only enough fuel for the outbound trip pour encourager les explorers to well, like, explore.

He's definitely the man for this job too - he really likes caves for a start.
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ustrax
post Mar 19 2007, 11:49 AM
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Here they are...

http://i16.photobucket.com/albums/b14/ustr...Mars/cave06.jpg

http://i16.photobucket.com/albums/b14/ustr...Mars/cave05.jpg

http://i16.photobucket.com/albums/b14/ustr...Mars/cave04.jpg

http://i16.photobucket.com/albums/b14/ustr...Mars/cave03.jpg

http://i16.photobucket.com/albums/b14/ustr...Mars/cave02.jpg

http://i16.photobucket.com/albums/b14/ustr...Mars/cave01.jpg


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ustrax
post Mar 19 2007, 03:20 PM
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QUOTE (ustrax @ Mar 19 2007, 11:49 AM) *


I've applied the same accurate technique I did with Ultreya... tongue.gif
And the results don't leave me very optimistic...
The image obtained is quite similar to some of Ultreya, there, where I thought were in depth features, is as we know, a dune field, a beautiful one, but a dune field...
Just see it for the positive side, if I was wrong once I can be wrong twice... smile.gif

Possible cave
Attached Image

Ultreya "abyss"
Attached Image


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djellison
post Mar 19 2007, 03:45 PM
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If you've taken the cave 'targets' from Themis toward the IR, remember that IR imaging is quite different to VIS imaging and you might see quite strange and odd results. IR imaging at night doesn't show the topography too well and is more about the thermal inertia of the target.

Doug
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elakdawalla
post Mar 19 2007, 03:54 PM
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No, those pictures are indeed VIS. Here's the full figure from the abstract, which also includes daytime and nighttime IR.
Attached Image

These are really cool. I can't wait for HiRISE versions.

--Emily


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djellison
post Mar 19 2007, 04:05 PM
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That'll teach me to comment without digging first smile.gif
Some nice Lat-Long info from these...

Dena
http://themis-data.asu.edu/img/V18053001
Center Latitude-6.084 N Center Longitude239.061 E

Chloe
http://themis-data.asu.edu/img/V13448001
Center Latitude-4.926 N Center Longitude239.193 E

Wendy
http://themis-data.asu.edu/img/V17716001
Center Latitude-8.099 N Center Longitude240.242 E

Annie
http://themis-data.asu.edu/img/V18340001
Center Latitude-6.267 N Center Longitude240.005 E

Abbey & Nikki
http://themis-data.asu.edu/img/V14334002
Center Latitude-8.498 N Center Longitude240.349 E

Jeanne
http://themis-data.asu.edu/img/V18315002
Center Latitude-5.636 N Center Longitude241.259 E

I can't find any MOC's to match so far - and I'm sure if there were some, they'd be in the abstract.

I'm just guessing here - on the possible structure w.r.t. the collapsed lava tubes - and this is possibly the worst 3d visualisation of all time - BUT - perhaps it's something a bit like that ( just not crap )

Doug
Attached thumbnail(s)
Attached Image
 

Attached File(s)
Attached File  test.mov ( 287.31K ) Number of downloads: 280
 
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babakm
post Mar 19 2007, 05:01 PM
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Doug,

I'm not sure you have the names matched to the right image as the caption in the abstract says the names are listed clockwise, not according to the alphabetical label (which would've been more intuitive).

I looked for them in the HRSC archive through the map interface (I'm at work) and found four in H0979_0000_ND3.IMG, Chloe in H1904_0000_ND3.IMG and Jeanne/Annie in H0968_0000_ND3.IMG.

Unfortunately, I don't have access to Gimp here in the office so I couldn't view the images at full res and/or crop for display on the forum.
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djellison
post Mar 19 2007, 05:07 PM
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I just listed the names in the order they were, and the image numbers in the order they were - ABCFED (with E having two caves and thus two names )

Screw H1904 - that's 1 Gig+....but I've got the other two HRSC obs on the way down.

Doug
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babakm
post Mar 19 2007, 05:17 PM
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H1904 is a pretty dark image anyway.

BTW, Dena is visible at the bottom of the Chloe THEMIS image as well.
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ustrax
post Mar 19 2007, 05:20 PM
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So...this must be Clöhe and Jeanne, right?
About Jeanne I don't know but Clöhe looks like even less of an abyss than my previous image...
Attached Image


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tty
post Mar 19 2007, 06:40 PM
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QUOTE (djellison @ Mar 19 2007, 05:05 PM) *
I'm just guessing here - on the possible structure w.r.t. the collapsed lava tubes - and this is possibly the worst 3d visualisation of all time - BUT - perhaps it's something a bit like that ( just not crap )


No Doug, that is not the way holes in lava tubes work. They are actual holes in the roof of the tube, and they do indeed often look rather like the ones in the pictures. Have a look at this for example:

http://www.hawaiiweb.com/kauai/html/sites/...e_wet_cave.html

I happen to know a bit about the subject, being interested in paleontology. Normally lava caves are rather dismal places paleontologically since the acid and often wet environment is very bad for bone preservation. However these holes in the roof are very effective pitfall traps and the talus cone that accumulates below the hole can be very good for fossils.
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