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Rev 141: Titan, distant view after the storm
titanicrivers
post Dec 2 2010, 10:22 PM
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“On December 5, ISS will image a half-phase Titan at a distance of 2.5 million kilometers (1.55 million miles). The camera will image the sub-Saturn hemisphere of the satellite, allowing researchers to continue to study the recent weather changes that have been occurring across Titan's equatorial region and that have brought methane rain to select regions of previously dry terrain”.
Seems a shame the NAC or WAC couldn’t take a few images before Dec 5th say on the second. Based on the SSS it would seem the area in S Senkyo (around 310 W and -20 ) that almost certainly had intense precipitation is better seen on the 2nd below left, and may be beyond the terminator and invisible on the 5th below on right. Also I couldn't confirm with the SSS that Titan would be as close as 2.5 Mkm on the 5th ???
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volcanopele
post Dec 2 2010, 10:30 PM
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Grr, no I goofed. I had Enceladus still selected in Celestia and didn't notice that when I wrote down the distance. Let me get a corrected number.

Yep, that should be 3.42 million kilometers.


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volcanopele
post Dec 2 2010, 10:39 PM
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The distance has been corrected in the Looking Ahead article. Thanks for the catch, titanicrivers.


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JohnVV
post Dec 5 2010, 08:41 AM
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oops i need to move the post
http://www.unmannedspaceflight.com/index.p...mp;#entry167421
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titanicrivers
post Dec 6 2010, 04:27 AM
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Here's the most likely area to scrutinize for changes related to the T72 storm (image below enhanced from ISS map). Enlargement of the dark circular areas or new roundish dark areas or widened dark channels might be seen on the Dec 5th images.
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titanicrivers
post Dec 7 2010, 07:31 PM
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Some Dec 5th images are in the raws but I really couldn't spot any obvious clouds nor surface features changes that suggest localized flooding. Anyone else see changes? I'll have to work more with the images as initially there seem to be an enhanced channel on one of the CL1 CB3 images.
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titanicrivers
post Dec 23 2010, 04:34 PM
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Here's a possible surface change in the S Senkyo region (between -10 and -20 latitude and 320W and 330W) present on the Dec 20 CL1CB3 filtered images. The dark area (arrow) seems fairly prominent now compared to pre- T72 storm images of the same area. Haven't gone through all previous images and the lighting and processing of the images differs but the change is similar to S Polar ISS images following the 2004 storm.
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titanicrivers
post Dec 25 2010, 09:42 AM
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A closer view of the possible surface change is compared to the pre-storm ISS basemap. The projected T-72 storm cloud appears to have been directly over the region of change suggesting this may be a shallow collection of methane rain (perhaps now just a playa).
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Hungry4info
post Dec 25 2010, 03:04 PM
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Wow. You've made quite a convincing case there.
I would really love to hear what the professionals think about this. Have they noticed it?


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volcanopele
post Dec 25 2010, 03:58 PM
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I can neither confirm or deny anything you have experienced with these images. Next question please. pancam.gif


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titanicrivers
post Dec 27 2010, 06:46 AM
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Agree lots more image analysis is needed before one can say if any significant changes are present in above and below images.
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JohnVV
post Dec 27 2010, 07:29 AM
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at a quick glance it dose not appear that there is a change , other than rotation .
QUOTE
I can neither confirm or deny anything you have experienced with these images. Next question please

a nice bit there .
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titanicrivers
post Dec 30 2010, 06:22 PM
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Here is another pair to ponder. The raw images are a closer match as far as distance to Titan and longitudinal center of the image. Arrow points to possible albedo difference. Images rotated so N is up and slightly enhanced.
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ugordan
post Dec 30 2010, 06:37 PM
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Now that's much more compelling evidence. Nice work.


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titanicrivers
post Dec 30 2010, 11:19 PM
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QUOTE (ugordan @ Dec 30 2010, 12:37 PM) *
Now that's much more compelling evidence. Nice work.

I appreciate your comment ugordan! Hopefully the observation will hold up under closer scrutiny.
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