T58 (July 8, 2009 / Rev 114) |
T58 (July 8, 2009 / Rev 114) |
Aug 5 2010, 07:11 AM
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#31
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
Sweet! Nice deltas, and a neat volcanic-looking craterthing to the right of the lake.
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Aug 5 2010, 08:02 AM
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#32
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Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
-------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Aug 6 2010, 08:59 AM
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#33
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Newbie Group: Members Posts: 15 Joined: 28-November 08 From: Germany Member No.: 4498 |
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Aug 7 2010, 04:55 PM
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#34
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
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Aug 7 2010, 05:46 PM
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#35
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Illumination is from below. So that is actually a depression, not a raised area. This feature is most likely a dried lakebed.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Aug 8 2010, 03:36 AM
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#36
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
optical illusions ,fun,fun,fun
the ones i "see" all the time are the raised impact craters blinking an inverted tone image helps 2 frame gif [attachment=22243:1.gif] ps that line better be a radar artifact |
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Aug 9 2010, 01:58 PM
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#37
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
This feature is most likely a dried lakebed. ...with steep sides around the edges. However, that central darker spot in the largest bright area *might* be a slight depression infilled with different RADAR-reflecting properties. Damp muds, for example. -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Oct 2 2010, 04:44 PM
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#38
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
A four-frame VIMS animation showing the evolution of the lake specular point:
Magnified 5x using nearest neighbor interpolation to show the actual specular point pixel size. It's only visible at 5 microns, the green (4.67 microns) and blue (3.26 microns) channels aren't in methane windows, they were chosen merely so they wouldn't be overexposed in the longer exposure cubes. -------------------- |
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Oct 2 2010, 06:30 PM
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#39
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Senior Member Group: Members Posts: 1628 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Nice animation Gordan. Would the evolution of the glint depicted here tell us mostly about the lake extent, or also about expansion of the glint by wave action (or lack thereof)?
-------------------- Steve [ my home page and planetary maps page ]
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Oct 2 2010, 07:16 PM
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#40
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Pretty much lake extent only AIUI. The latest understanding appears to be that the lakes are very flat i.e. not much wind-driven wave action.
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Oct 2 2010, 07:32 PM
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#41
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Thanks for the movie, ugordan. This is an elaboration ot third frame, compared to original...
-------------------- I always think before posting! - Marco -
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Oct 9 2010, 03:10 AM
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#42
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Member Group: Members Posts: 131 Joined: 30-August 06 From: Moscow, Idaho Member No.: 1086 |
Nice animation Gordan. Would the evolution of the glint depicted here tell us mostly about the lake extent, or also about expansion of the glint by wave action (or lack thereof)? The size is only telling you about the point-spread-function of the VIMS instrument, as it turns out -- not lake extent. The time evolution is telling you about the waves and whether the specular point is on land or liquid. My paper on this was just accepted, and I will post a version here as soon as it's up on the _Icarus_ website. What the heck, here it is. It will be up on _Icarus_ in press soon. - Jason |
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Oct 9 2010, 04:23 AM
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#43
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
What the heck, here it is. It will be up on _Icarus_ in press soon. It is in press now, as of yesterday. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 9 2010, 04:40 AM
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#44
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Member Group: Members Posts: 131 Joined: 30-August 06 From: Moscow, Idaho Member No.: 1086 |
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Oct 9 2010, 09:39 AM
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#45
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Thanks for the paper, VIMS Jason. So, there's 14 speculars on T59 as well?
Must...animate...those... -------------------- |
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