Galileo Imagery, I couldn't find a topic not specific to one moon.... Options

[jekbradbury]

As Jason Perry pointed out a couple months back over at the Gish Bar Times, we have recently passed the tenth anniversary of Galileo's I24 flyby, that probe's first close-up look at Io. However, many of the images collected during the flyby had at least one of two anomalies, which the team later characterized here. They were able to create an algorithm to correct the first and simpler of the two anomalies, but were unable to correct the second anomaly. Thus, about a dozen close-in images of Io have been lost. I made an initial attempt at correcting the second anomaly for the example image used in the characterization document, but, although it makes for an interesting exercise in image processing, it's completely useless in its current form for anything resembling scientific analysis...
original:

attempted restoration:

The images themselves are here, with those containing an anomaly in the "garbled" directory and corrected versions of those with just the first anomaly in the "repaired" directory.

[tedstryk]

Impressive!

By the way, I don't think I ever have seen the documentation for the second anomaly. Very interesting!

[tedstryk]

I posted a short Europa-related blog entry yesterday.

http://planetimages.blogspot.com/2009/12/n...-of-europa.html

[ugordan]

Here are two rough color views from Galileo. Valhalla impact basin on Callisto:


Ganymede mosaic consisting of 4 footprints:


That's the Enki Catena crater chain at lower right. There exists a fifth footprint that I *think* fits to the lower left one, but there's no overlap to match them and I omitted it here.

[volcanopele]

What a difference rotating an image can make:



From my blog post: The mosaic above shows a portion of the northeastern margin of Chaac Patera, a volcanic depression on the anti-Jupiter hemisphere of Io. Click the image for a full-resolution version. The terrain to the upper left is the hummocky plains that make up the upper level of the depression Chaac sits in. The terrain to the lower right is the floor of Chaac Patera, consisting of overlapping, thin silicate flows. The margin itself is quite steep, with slopes approach 70 degrees on the right hand side. On the left hand side, mass wasting has produced a two-tone talus apron at the base of the slope. This mass wasting seems to be the result of more extensive slope failure (see the broken off section of massive lava on the far left edge of the image).

These images were taken during the Galileo spacecraft's February 2000 flyby of Io. The pixel scale is 7 meters per pixel.

See PIA02551 to see how these images are normally shown... Rotate the image 90 degrees and suddenly the geologist part of my brain starts saying, "Oh now this makes A LOT more sense!"

[machi]

Amazing! I'm not geologist, but I have seen this image many times (in raw form) and now it looks really more understandable to me. Fantastic cliff!
Let's Look at Io from a Different Angle!

[DrShank]

or a slightly different take, simulating the view one might have out of a porthole on passing space cruiser . . .

Attached thumbnail(s)

 

[DrShank]

and a different scene . . .
this is the eroded plains shot north of the equator, for which we have no context imaging. it shows a dark smooth plataeu in the foreground
and complex plains surrounding it. these palins are probably overlapping flows and erosional debris slides of some sort.

Attached thumbnail(s)

 

[Explorer1]

On a related note, look at what made it onto Wikipedia's front page today!
http://en.wikipedia.org/wiki/Callisto_%28moon%29
Rather a coincidence considering the recent blog post by Emily.....

[volcanopele]

I had this on my blog a few days ago, but I've gotten around to putting together a few mosaics of Europa from 1998 and 1999 by Galileo:



15ESREGMAP01
15ESREGMAP02
Description at http://www.gishbartimes.org/2010/03/two-mo...pa-mosaics.html

17ESREGMAP01
17ESAGENOR03
17ESSOUTHP01
17ESREGMAP02
Description at http://www.gishbartimes.org/2010/03/and-no...completely.html

19ESRHADAM01
Description at http://www.gishbartimes.org/2010/03/19esrh...-of-europa.html

[stevesliva]

17ESSOUTHP01

Paging nirgal...

[nprev]

Those are just mind-blowing, Jason.

I never knew that there were features like that on Io...(sorry, couldn't resist! )

[ugordan]

Shamelessly stealing volcanopele's 10ISIOGLOC03 Io image and running it through CIE XYZ color calculation code based on Galileo's filter wavelengths (R 665, G 559 and V 413 nm):



It's also gamma-corrected (assuming the original composite is straight-up RGB substitution, judging by contrast and terminator line). Io's one of the few moons that doesn't really look bland this way.

[Decepticon]

Oh wow Gold!

[JohnVV]

I thought that this one was the correct color and gamma
and have been planing on redoing the color on my map ( i white balanced it )
{ http://celestiamotherlode.net/catalog/show...p?addon_id=1110 }
[attachment=22188:21ISCOLOR_01.jpg]
http://pirlwww.lpl.arizona.edu/~perry/io_images/c21.htm
http://pirlwww.lpl.arizona.edu/~perry/io_i...1ISCOLOR_01.png