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Cloud hunting between flybys, more distant views
volcanopele
post Feb 22 2009, 07:58 PM
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Here is a preview image with a grid:


Attached thumbnail(s)
Attached Image
 


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titanicrivers
post Feb 22 2009, 09:11 PM
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Wow, awesome VP!
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ngunn
post Feb 22 2009, 10:25 PM
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QUOTE (volcanopele @ Feb 22 2009, 07:58 PM) *
Here is a preview image with a grid:


That's very nice. Any chance that could be done on 'looking ahead'?
AND
Can you tell us whether that 9 hour cloud imaging campaign on 15th Feb. actually took place? There's still only the one set of 4 images on the public website.
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claurel
post Feb 22 2009, 10:32 PM
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QUOTE (Juramike @ Feb 21 2009, 07:51 AM) *
Well, thanks for the tip. I installed it and now I can do lat/lon grids for everything but Titan.


The problem might be as simple as the cloud layer obscuring the lat/lon grid. Try pressing 'i' to disable clouds.

I've considered modifying Celestia's code a little so that the grid is displayed over the cloud layer. I'm not absolutely convinced that this is a good idea, as it could produce odd looking results for planets with a thin cloud layer (e.g. Mars.) Let me know what you think...

--Chris

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volcanopele
post Feb 22 2009, 11:19 PM
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QUOTE (ngunn @ Feb 22 2009, 03:25 PM) *
That's very nice. Any chance that could be done on 'looking ahead'?
AND
Can you tell us whether that 9 hour cloud imaging campaign on 15th Feb. actually took place? There's still only the one set of 4 images on the public website.

Probably not. We are trying to make these look a bit cleaner, a bit more realistic if you will (though obviously, that isn't quite the case with Titan already). Rest assured though that I try to rotate so that north is up in any graphics I use in "Looking Ahead"

And let's... not talk about that imaging campaign... we at least got those 4 images. And those 4 are quite good. But still. Titan hates me. It knows I cheated on it.


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Juramike
post Feb 22 2009, 11:31 PM
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QUOTE (claurel @ Feb 22 2009, 05:32 PM) *
The problem might be as simple as the cloud layer obscuring the lat/lon grid. Try pressing 'i' to disable clouds.


Oh..wow! That did the trick! And the surface features are revealed as well! Whoo-hoo!


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titanicrivers
post Feb 22 2009, 11:41 PM
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QUOTE (claurel @ Feb 22 2009, 04:32 PM) *
The problem might be as simple as the cloud layer obscuring the lat/lon grid. Try pressing 'i' to disable clouds.

I've considered modifying Celestia's code a little so that the grid is displayed over the cloud layer. I'm not absolutely convinced that this is a good idea, as it could produce odd looking results for planets with a thin cloud layer (e.g. Mars.) Let me know what you think...

--Chris


You are a genius CC! Pressing the i got rid of the clouds on Titan and there is the superimposed grid and surface. Now to get things aligned better.
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Juramike
post Feb 23 2009, 12:16 AM
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Here's a coordinated view between the Cassini Raw (contrast modified) and Celestia:
Attached Image


And here is a zoom using Photoshop (magnetic lasso is your friend) to select and detail some of the lat/lon grid:
Attached Image


The cloud streak runs from WNW to ESE. From roughly [-45S, 315W] to [-53, 285W]

IIRC, the alignment of this cloud to Mezzoramia is about the same as the alignment of the N Polar cloud to Kraken Mare.
Hmmmmm.....

-Mike


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Juramike
post Feb 23 2009, 01:17 AM
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Here is another crop of a contrast-enhanced image, this time overlaid by VP's lat/lon grid (VP's posted image/grid rotated ca. 25 degrees clockwise):
Attached Image

(Elba Facula is centered near [-10S, 0])
-Mike


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ngunn
post Mar 9 2009, 10:05 PM
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Kraken Mare again:
http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=185908
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titanicrivers
post Mar 20 2009, 12:00 PM
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QUOTE (ngunn @ Feb 22 2009, 12:57 PM) *
I think that grid needs rotating clockwise quite a bit.


Well I know this is a bit late but I had to make ammends. Nice work by VP and Mike on previous page! The Celestia Titan grid-surface map is nice however when it comes to locating clouds there is likely to be an error as they are considerably above surface level!

Hmmm. Note to editor: I cannot seem to upload my photoshop files anymore. Anyone else having trouble?

Well that time things worked!

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ngunn
post Mar 20 2009, 01:02 PM
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Another beautiful shot of the northern 'dark surface region' emerging from night (appropriately released on our own spring equinox).

http://saturn.jpl.nasa.gov/multimedia/imag...8/N00132269.jpg
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Phil Stooke
post Mar 20 2009, 02:18 PM
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Here's a bit of a stretch on that one...

Phil

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... because the Solar System ain't gonna map itself.

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NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
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ngunn
post Mar 20 2009, 09:59 PM
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Thanks for that, Phil. The toe of Italy seems to be falling off. Maybe it was never that well attached? The discovery image of Kraken Mare is annotated with a rather inclusive shoreline despite some bright pixels inside the boundary.

http://upload.wikimedia.org/wikipedia/comm...Kraken_mare.jpg
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titanicrivers
post Mar 21 2009, 07:16 PM
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Nice work on this latest Titan image!
Kraken over the last several years appears not to have changed radically. (see images below). I wonder if it has been substantially maintained by the persisting ethane/methane rain clouds of the north pole region (PIA09171), from runoff via inflowing streams visualized in previous SAR’s (PIA09217) as well as from underground sources via sapping from methanofers. Its persistence may suggest its relatively deep if indeed it’s liquid.

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