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Galileo Io Mosaics
Exploitcorporati...
post Oct 22 2005, 01:36 PM
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24ISCOLCHIS01:
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Decepticon
post Oct 22 2005, 01:42 PM
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Just as Europa deserves a orbiter so does IO.

All this pic needs is color!
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Exploitcorporati...
post Oct 22 2005, 01:52 PM
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24ISSTEREO01:
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...if you don't like my melody, i'll sing it in a major key, i'll sing it very happily. heavens! everybody's all aboard? let's take it back to that minor chord...

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tedstryk
post Oct 22 2005, 06:26 PM
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Good mosaics! I have been working with Io a bit lately too. Here is the I32 color image. I have been attempting to develop a technique to effectively process images of targets as color-varied as Io with my usual methods, and have made some progress. Still problematic though.



Here is a variant.



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hubdel11
post Jan 5 2006, 10:03 PM
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this work is just amazing !
Do you use the pds images ?
Are you planning new mosaics ?
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volcanopele
post Jan 5 2006, 10:11 PM
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Nice work everybody. Nice to see some people working with the I24 data. There really is a lot of neat stuff there as long as you are careful not to overinterpret and be mindful of the limits of the reconstructed data set.

For the first few years here at UA, I worked with Galileo Io data. My only official released image, is a view of Gish Bar Patera taken during the I32 encounter: http://photojournal.jpl.nasa.gov/catalog/PIA03884 . This image was taken a few months after a major outburst at that particular volcano. Even did an LPSC abstract about it.


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ljk4-1
post Jan 6 2006, 03:14 AM
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When Io was first imaged by Voyager 1 in 1979, why did they assume it was such a bright red-yellow color? Thus the famous pizza comparison.


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no sympathy, I go to commune with the rocks, whose hearts are comparatively soft."

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edstrick
post Jan 6 2006, 10:22 AM
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Voyager's selenium-sulfur detector based vidicon tube cameras had good near-UV sensativity, but crappy red and zero far-red sensativity. "red" filtered images had an effective bandpass better described as "orange". Voyager could not take true color red/green/blue images with filter bands reasonably well matched to the nominal human eye's bands.
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Bjorn Jonsson
post Jan 6 2006, 11:59 AM
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To make matters even worse most of the Voyager color composites of Io I have seen are OGV (orange-green-violet) and not OGB.

Also Io's spectrum is weird with some of the areas that are bright in the Galileo red filtered images indistinguishable from nearby areas in the Voyager orange filtered images. These same areas are even brighter relative to nearby areas at near-infrared wavelengths (e.g. Galileo 756 nm images).

A few years ago I made a crude attempt to get a more realistic color balance from Galileo images by creating synthetic blue images from green and violet images (Galileo had no blue filter) using Voyager images as a guide. These images can be seen here:

http://www.mmedia.is/bjj/3dtest/ (scroll down a bit and look for Io's color)

While I'm sure these are not true color images I still believe they are closer to true color than the publicly released Galileo RGV images.
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Exploitcorporati...
post Jan 11 2006, 09:16 AM
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24ISAMSKGI01:
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...if you don't like my melody, i'll sing it in a major key, i'll sing it very happily. heavens! everybody's all aboard? let's take it back to that minor chord...

Galileo Flickr Gallery
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Exploitcorporati...
post Jan 11 2006, 09:26 AM
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QUOTE (hubdel11 @ Jan 5 2006, 03:03 PM)
this work is just amazing !
Do you use the pds images ?
Are you planning new mosaics ?
*



Sorry it took so long to reply. The deconvolved I24 images came from an ftp server, but it's been so long (early 2000) that I cannot recall the URL. I'm not sure if they've made it onto the PDS. I assume their absence is due to the difficulty in properly calibrating these radiation-mangled monstrosities for scientific use. The above mosaic is a very crude approximation, made with cheat-sheet assistance from the PIA release from 2000. There will be more to come.


--------------------
...if you don't like my melody, i'll sing it in a major key, i'll sing it very happily. heavens! everybody's all aboard? let's take it back to that minor chord...

Galileo Flickr Gallery
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tedstryk
post Jan 11 2006, 01:08 PM
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QUOTE (Exploitcorporations @ Jan 11 2006, 09:26 AM)
Sorry it took so long to reply. The deconvolved I24 images came from an ftp server, but it's been so long (early 2000) that I cannot recall the URL. I'm not sure if they've made it onto the PDS. I assume their absence is due to the difficulty in properly calibrating these radiation-mangled monstrosities for scientific use. The above mosaic is a very crude approximation, made with cheat-sheet assistance from the PIA release from 2000. There will be more to come.
*


If I can ever recover my old hard drive, I had copies. Exploitcorporations, perhaps you should change your name to Exploitseeminglyhoplessdatatomakesomegreatimageproducts Probably too long.... biggrin.gif


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hubdel11
post Jan 12 2006, 03:47 PM
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Well, i've found the raw data at
http://pdsimg.jpl.nasa.gov/data/go-j_jsa-s...epaired/c052079
but the quality is not the same !
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volcanopele
post Jan 12 2006, 07:20 PM
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QUOTE (Exploitcorporations @ Jan 11 2006, 02:26 AM)
Sorry it took so long to reply. The deconvolved I24 images came from an ftp server, but it's been so long (early 2000) that I cannot recall the URL. I'm not sure if they've made it onto the PDS. I assume their absence is due to the difficulty in properly calibrating these radiation-mangled monstrosities for scientific use. The above mosaic is a very crude approximation, made with cheat-sheet assistance from the PIA release from 2000. There will be more to come.
*

There were plans to release, seperate from the PDS release, the deconvolved I24 images. Unfortunately, nothing came of it, but if I can figure out a way to do it quickly, perhaps it can be revived.


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elakdawalla
post Jan 12 2006, 07:24 PM
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QUOTE (volcanopele @ Jan 12 2006, 11:20 AM)
There were plans to release, seperate from the PDS release, the deconvolved I24 images.  Unfortunately, nothing came of it, but if I can figure out a way to do it quickly, perhaps it can be revived.
*

I'd be happy to host them on the TPS site...

--Emily


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