Dione Image Products Options

[Exploitcorporati...]

Golden oldies, in anticipation for the 21 November encounter...if there was one. Here's the 15 December 2004 high-res view, with a few enhancements thanks to Mr. Albers and Celestia:

[Exploitcorporati...]

The Padua Linea mosaic in wide-angle context (11 October 2005):

[tasp]

. . . Enceladean . . .

I reiterate my support for the term 'Enceledosian'.

It sounds more alienesque.

[dvandorn]

I think I prefer "Enceladan"...

-the other Doug

[Exploitcorporati...]

I just came across these today, and don't remember having seen them at all before. They obviously seem to have been taken at the same time as the crescent mosaic. Just wanted to share:

[CAP-Team]

I did a quick 'n dirty ir3/grn/uv3 combo to create a "color" image of the latest Dione flyby on april 24th, then I stitched them together.



Below is a simulated view of the same scene, using Steve Albers' map and xplanet.

[tedstryk]

Here is a recent Dione mosaic compared to the Voyager high resolution mosaic. It is amazing how illumination effects crater visibility. The first link is to the full resolution version, the second link is to one without the lines showing the craters I am talking about.



http://www.strykfoto.org/outericymoons/dioniillumarked.jpg

http://www.strykfoto.org/outericymoons/dioniillu.jpg

[scalbers]

Ted,

Yes I agree that illumination has an important effect on crater visibility. This area in particular was a consideration in prioritizing images for an updated Dione map version that I just posted on my website. I may want to tweak this some more, we'll see. The update is at this URL:

http://laps.noaa.gov/albers/sos/sos.html#DIONE

[tedstryk]

It really is a troublesome area. By the way, here is the full resolution version of my Voyager mosaic, in case it is useful.

http://www.strykfoto.org/outericymoons/vdionef.png

[volcanopele]

This mosaic has been officially released:

http://ciclops.org/view.php?id=3214

I have to say this is one my favorite views of Dione. A version of this image has been my desktop background for a while now.

[ugordan]

While geometrically correct, I dislike the jaggedness at the limb these reprojections produce. It makes the mosaics look too artificial. I'd personally much prefer if the limb at these positions was slightly blurred/antialiased in Photoshop, the images are for public consumption and not scientific analysis anyway.

That said, this part of the release puzzles me:

The monochrome view uses a combination of images taken with spectral filters sensitive to wavelengths of light centered at 338, 568 and 930 nanometers.

A monochrome image created with IR/GRN/UV filters?

[volcanopele]

Yeah, that is an unfortunate side-effect. But I would rather that than not have the images align correctly. I stumbled on a solution when working on the until recently missing Tethys images, make my software think the radius of the satellite is bigger than it actually is. This caused my software to reproject the black background and Tethys, making the actual limb look at little more natural. Not my intended result, and if I were really working on Tethys maps, I might have complained a bit more.

Yeah, the image was a UV3/GRN/IR3 (or was it IR1..., grr, I can't remember) image, but rather than make it color ratio image (as has been done to similar false color images), it was made into a greyscale image.

[ugordan]

but rather than make it color ratio image (as has been done to similar false color images), it was made into a greyscale image.

Um, why not just release the stretched color composite as is since you've gone through the trouble of producing it anyway? It would nicely show the grayness (or is it "brownness" in IR/G/UV, I forget) of this moon.

[scalbers]

It really is a troublesome area. By the way, here is the full resolution version of my Voyager mosaic, in case it is useful.

http://www.strykfoto.org/outericymoons/vdionef.png

Yes this is a good one to add in - thanks much. You can see how it looks now on my updated map at this URL:

http://laps.noaa.gov/albers/sos/sos.html#DIONE

[Exploitcorporati...]

That is an outstanding version of the V1 Dione mosaic, Ted. The new map looks wonderful...that nasty seam between the Cassini and Voyager coverage has all but evaporated with the April imagery. It looks like there may be an opportunity to plug the remaining lower-resolution gap in September.