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Titan's changing lakes
ngunn
post Jan 29 2009, 07:22 PM
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Today's big news?
http://ciclops.org/view/5471/CASSINI_FINDS...ILL_TITAN_LAKES

Changes in the south polar region were announced late last year. Is there more to this story now??
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ngunn
post Nov 1 2009, 07:25 PM
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Excuse a very basic question: would that be one pixel at one wavelength or do you get an IR spectrum for that pixel?
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Juramike
post Nov 1 2009, 08:05 PM
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QUOTE (ngunn @ Nov 1 2009, 02:25 PM) *
Excuse a very basic question: would that be one pixel at one wavelength or do you get an IR spectrum for that pixel?


Each pixel is being observed at the VIMS IR wavelengths. So, in theory, you'd get an IR spectrum for each pixel location. In practice, the methane absorptions limit how many wavelengths you could observe, then atmospheric scattering makes some of those wavelengths (esp. the shorter ones) difficult as well.

Somebody's gonna have fun applying all the atmospheric and haze corrections to get the corrected spectra.

It'll only be close to a "perfect mirror" at a few select wavelengths due to the intervening atmosphere. Kind of fun to imagine a funhouse mirror that would only reflect "blue" and "orange" but nothing else.


--------------------
Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Posts in this topic
- ngunn   Titan's changing lakes   Jan 29 2009, 07:22 PM
- - ngunn   Aah, there's this: http://saturn.jpl.nasa.gov/...   Jan 29 2009, 07:32 PM
- - volcanopele   Here are some the associated graphics: http://pho...   Jan 29 2009, 07:34 PM
- - volcanopele   QUOTE (ngunn @ Jan 29 2009, 12:22 PM) Cha...   Jan 29 2009, 07:35 PM
- - ngunn   That's brilliant, thanks VP.   Jan 29 2009, 07:45 PM
|- - Jason W Barnes   I actually much prefer that these press releases c...   Jan 29 2009, 09:11 PM
|- - ngunn   QUOTE (Jason W Barnes @ Jan 29 2009, 09:1...   Jan 30 2009, 02:14 AM
|- - Jason W Barnes   QUOTE (ngunn @ Jan 29 2009, 08:14 PM) Whi...   Jan 30 2009, 05:33 PM
|- - ngunn   That is indeed most helpful. Although I'm stil...   Jan 30 2009, 08:16 PM
|- - rlorenz   QUOTE (ngunn @ Jan 30 2009, 03:16 PM) Wha...   Feb 4 2009, 03:36 PM
- - Decepticon   Does anyone have a radar swath overlay-ed of the s...   Feb 2 2009, 10:57 AM
|- - titanicrivers   QUOTE (Decepticon @ Feb 2 2009, 04:57 AM)...   Feb 2 2009, 03:15 PM
- - ngunn   Excellent!!   Feb 4 2009, 09:11 PM
- - nprev   Oh, goodygoodygoody...Santa Ralph hints that a bit...   Feb 5 2009, 12:37 AM
- - Juramike   Bam! There it is! Lorenz et al. LPSC (2...   Feb 7 2009, 04:48 PM
- - ngunn   Brilliant discovery - brilliant paper title! ...   Feb 7 2009, 07:20 PM
|- - rlorenz   QUOTE (ngunn @ Feb 7 2009, 02:20 PM) Bril...   Feb 9 2009, 06:22 PM
|- - Jason W Barnes   QUOTE (rlorenz @ Feb 9 2009, 12:22 PM) Bu...   Feb 10 2009, 01:52 AM
- - ngunn   Taking this together with earlier VIMS results, ma...   Feb 8 2009, 08:37 AM
- - nprev   Hmm. Sorry to hear that, Ralph; it was indeed a gr...   Feb 9 2009, 07:57 PM
- - ngunn   Or perhaps other 'disadvantaged' topics we...   Feb 9 2009, 09:15 PM
|- - rlorenz   QUOTE (ngunn @ Feb 9 2009, 04:15 PM) Perh...   Feb 15 2009, 04:21 AM
- - ngunn   Great - another potentially variable lake property...   Feb 15 2009, 07:51 PM
|- - Jason W Barnes   VIMS Ontario Lacus paper is now out in print from ...   Apr 10 2009, 11:32 PM
- - ngunn   A huge thank you (again) for making another fascin...   Apr 11 2009, 07:26 AM
- - titanicrivers   As above. A very readable and yet compelling pape...   Apr 11 2009, 12:28 PM
- - ngunn   Is anybody going to have a go at matching the alti...   Apr 11 2009, 10:04 PM
|- - Jason W Barnes   QUOTE (ngunn @ Apr 11 2009, 03:04 PM) Is ...   Apr 12 2009, 06:25 PM
- - HughFromAlice   The variation in the height of the surface of Onta...   Aug 23 2009, 06:08 AM
|- - Gsnorgathon   Hey! I got lucky and got the whole article. (D...   Aug 23 2009, 05:29 PM
|- - rlorenz   QUOTE (HughFromAlice @ Aug 23 2009, 01:08...   Aug 23 2009, 06:26 PM
|- - djellison   QUOTE (rlorenz @ Aug 23 2009, 07:26 PM) F...   Aug 24 2009, 08:01 AM
- - nprev   It's a fascinating result, Ralph, and clearly ...   Aug 23 2009, 09:08 PM
- - AndyG   Reading this made me think of the artwork by Richa...   Aug 24 2009, 08:26 AM
- - ngunn   BIG changes observed at Ontario Lacus in the 4th a...   Sep 1 2009, 11:24 AM
|- - titanicrivers   QUOTE (ngunn @ Sep 1 2009, 05:24 AM) BIG ...   Sep 1 2009, 12:40 PM
|- - Hungry4info   QUOTE (titanicrivers @ Sep 1 2009, 06:40 ...   Sep 1 2009, 01:15 PM
- - ngunn   Strange, it works for me OK, although it does invo...   Sep 1 2009, 01:34 PM
|- - titanicrivers   QUOTE (ngunn @ Sep 1 2009, 07:34 AM) Stra...   Sep 1 2009, 05:20 PM
|- - HughFromAlice   QUOTE (titanicrivers @ Sep 2 2009, 02:50 ...   Sep 1 2009, 11:30 PM
- - belleraphon1   All.. I found I had to outside the forum and go ...   Sep 1 2009, 01:54 PM
- - belleraphon1   And, of course, I copy the wrong abstract... sorry...   Sep 1 2009, 01:57 PM
- - remcook   How well do the ISS and RADAR 'shorelines...   Sep 1 2009, 02:36 PM
- - ngunn   I have to admit I'm baffled by the numbers rig...   Sep 1 2009, 03:09 PM
- - Sunspot   So when will us common folk get to see the T57/T58...   Sep 1 2009, 03:40 PM
- - ngunn   I've edited my previous post 42 to correct a n...   Sep 1 2009, 06:18 PM
- - volcanopele   Well, hopefully they will broadcast the oral sessi...   Sep 1 2009, 11:34 PM
- - ngunn   This presentation will compare apparent shorelines...   Sep 3 2009, 11:12 AM
- - Olvegg   NASA Cassini Radar Observes Seasonal Change in Tit...   Oct 7 2009, 06:11 PM
|- - titanicrivers   QUOTE (Olvegg @ Oct 7 2009, 01:11 PM) NAS...   Oct 8 2009, 03:32 AM
- - ngunn   Spectacular changes - and so plain to see! (No...   Oct 7 2009, 08:38 PM
- - ngunn   I am trying to post the VIMS image of the bottom r...   Oct 7 2009, 09:50 PM
- - volcanopele   I think the ISS/VIMS/RADAR story is coming along n...   Oct 7 2009, 10:02 PM
|- - Webscientist   QUOTE (volcanopele @ Oct 8 2009, 12:02 AM...   Oct 8 2009, 08:54 PM
- - ngunn   Link from remcook: http://www.sciencedirect.com/s...   Oct 7 2009, 10:28 PM
- - volcanopele   I guess my comment is that I think they have it ba...   Oct 7 2009, 11:58 PM
- - Sunspot   How wide is thay channel where it appears to open ...   Oct 8 2009, 07:53 AM
- - volcanopele   The landing site might depend on the season when t...   Oct 8 2009, 09:03 PM
- - nprev   Hmm. It does seem as if the 'desert' equat...   Oct 8 2009, 09:13 PM
|- - ngunn   QUOTE (nprev @ Oct 8 2009, 10:13 PM) Huyg...   Oct 8 2009, 09:53 PM
- - volcanopele   Yeah, and storms are not unheard of at the latitud...   Oct 8 2009, 09:18 PM
- - nprev   Gotcha. I'm definitely thinking flash floods a...   Oct 8 2009, 09:36 PM
- - djellison   Some posts have been removed from this thread, as ...   Oct 9 2009, 04:33 PM
- - titanicrivers   Check out Photojournal http://photojournal.jpl.nas...   Oct 10 2009, 03:01 PM
- - ngunn   VIMS sees specular reflection from Kraken Mare: Q...   Oct 25 2009, 09:48 PM
|- - Jason W Barnes   QUOTE (ngunn @ Oct 25 2009, 02:48 PM) On ...   Oct 26 2009, 02:00 PM
- - ngunn   And there's so much more - here: (struggling ...   Oct 25 2009, 10:50 PM
- - ngunn   Personal anecdote: perhaps not many people remembe...   Oct 26 2009, 12:01 AM
|- - Jason W Barnes   QUOTE (ngunn @ Oct 25 2009, 05:01 PM) The...   Oct 26 2009, 05:32 PM
|- - rlorenz   QUOTE (Jason W Barnes @ Oct 26 2009, 01:3...   Nov 1 2009, 03:11 PM
|- - Jason W Barnes   QUOTE (rlorenz @ Nov 1 2009, 08:11 AM) As...   Nov 2 2009, 06:54 PM
|- - rlorenz   QUOTE (Jason W Barnes @ Nov 2 2009, 01:54...   Nov 6 2009, 08:58 PM
|- - volcanopele   QUOTE (rlorenz @ Nov 6 2009, 01:58 PM) Wo...   Nov 6 2009, 09:26 PM
|- - Jason W Barnes   QUOTE (rlorenz @ Nov 6 2009, 01:58 PM) Hm...   Nov 7 2009, 05:54 AM
- - ngunn   Another morsel from the conference abstracts. Any...   Oct 26 2009, 01:34 PM
- - ngunn   Catching the lakeshine: Radar 21st December ...   Oct 26 2009, 02:33 PM
|- - Jason W Barnes   QUOTE (ngunn @ Oct 26 2009, 07:33 AM) Cat...   Oct 26 2009, 02:46 PM
- - ngunn   Yeah, you caught the sun's direct reflection a...   Oct 26 2009, 03:04 PM
- - ngunn   Thanks, Jason. Congrats to the team and good luck ...   Oct 27 2009, 12:41 PM
- - ngunn   Excuse a very basic question: would that be one pi...   Nov 1 2009, 07:25 PM
|- - Juramike   QUOTE (ngunn @ Nov 1 2009, 02:25 PM) Excu...   Nov 1 2009, 08:05 PM
||- - ngunn   QUOTE (Juramike @ Nov 1 2009, 08:05 PM) a...   Nov 1 2009, 09:17 PM
|- - Jason W Barnes   QUOTE (ngunn @ Nov 1 2009, 12:25 PM) Excu...   Nov 2 2009, 06:56 PM
- - ngunn   Article on seasonal and longer term change: http:/...   Nov 30 2009, 10:53 AM
|- - volcanopele   We shall see. I still think its seasonal.   Nov 30 2009, 05:17 PM
|- - Jason W Barnes   QUOTE (volcanopele @ Nov 30 2009, 10:17 A...   Nov 30 2009, 05:37 PM
- - volcanopele   Where are the south polar dry lakes? What do you ...   Nov 30 2009, 05:53 PM
|- - Jason W Barnes   QUOTE (volcanopele @ Nov 30 2009, 10:53 A...   Nov 30 2009, 07:05 PM
|- - ngunn   QUOTE (Jason W Barnes @ Nov 30 2009, 07:0...   Nov 30 2009, 09:06 PM
||- - Juramike   QUOTE (ngunn @ Nov 30 2009, 04:06 PM) Of ...   Nov 30 2009, 09:54 PM
|- - rlorenz   QUOTE (Jason W Barnes @ Nov 30 2009, 02:0...   Dec 1 2009, 11:23 PM
|- - Jason W Barnes   QUOTE (rlorenz @ Dec 1 2009, 04:23 PM) Ti...   Dec 2 2009, 05:54 PM
- - ngunn   I don't have access to the full paper, but fro...   Nov 30 2009, 06:00 PM
- - Juramike   I really, really, like the idea of the longer term...   Nov 30 2009, 07:51 PM
- - ngunn   I've been checking authors' websites, but ...   Nov 30 2009, 08:32 PM
- - volcanopele   Very nice article! Thanks for the link. Thou...   Nov 30 2009, 08:50 PM
|- - Juramike   QUOTE (volcanopele @ Nov 30 2009, 03:50 P...   Nov 30 2009, 09:46 PM
- - ngunn   Yes. And if the lakes 'breathe' into and o...   Nov 30 2009, 10:27 PM
- - remcook   So, what is new in this paper? The speculation abo...   Dec 2 2009, 08:35 AM
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