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30th Anniversary of the Voyager 1 Flyby of Jupiter
volcanopele
post Mar 5 2009, 08:20 PM
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Today marks the 30th anniversary of Voyager 1's flyby of Jupiter. On March 5, 1979, Voyager 1 flew through the Jupiter system providing a wealth of information of Jupiter, its magnetic field, and moons. Thanks to Voyager 1, the Galilean satellites became worlds with real geology and amazing vistas. Voyager 1 also revealed Jupiter's ring system and Io's volcanism for the first time.

I've written up a longer post about the encounter with Io on my blog, which also has an animation of the flyby: http://gishbar.blogspot.com/2009/03/30th-a...1-flyby-of.html


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volcanopele
post Mar 5 2009, 10:14 PM
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There was an earlier thread on this subject a couple years back with a few great link about the discovery of active volcanism on Io:

http://www.unmannedspaceflight.com/index.p...c=3855&st=0
http://www.planetary.org/explore/topics/sp...ries_kelly.html
http://eric.ed.gov/ERICDocs/data/ericdocs2...80/1f/8f/7c.pdf


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Ian R
post Mar 6 2009, 12:13 PM
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Here's the official JPL visulization of the Voyager 1 flyby; a contempory computer animation by Jim Blinn with satellite textures by Rick Sternbach (who later went on to work on Star Trek):

http://video.google.com/videoplay?docid=-8...45219&hl=en

If anyone has a better quality version of this vintage clip, I'd love to obtain a copy.

Ian.


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volcanopele
post Mar 8 2009, 10:29 AM
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In commemoration of this 30th anniversary of the discovery of volcanism on Io, I have finally finished the Voyager 1 southern hemisphere mosaic of Io that I started last year (though I lost the original project files sad.gif ). But that's okay, nothing a little Saturday project can't fix:

http://gishbar.blogspot.com/2009/03/voyage...ere-mosaic.html

Here is the URL to the full-size image: http://pirlwww.lpl.arizona.edu/%7Eperry/io...ole_mosaic2.png


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volcanopele
post Mar 8 2009, 10:43 AM
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Of course, no sooner do I write "though I lost the original project files", that I find them in a dark, scary corner of my hard drive. Meh, this version is a lot better...and is ACTUALLY controlled to the USGS basemap. Which wasn't easy, some of the support for Voyager images in ISIS is broken. I think I had to perform some human sacrifices to the ISIS gods to get this to look nice...


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Astro0
post Mar 8 2009, 10:53 AM
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That's astounding and outstanding!

The visually smooth surface with these amazing mountains/volcanoes poking out, and then these ancient calderas and flow features.
What a place!

Do yourself a favour everyone and download volcanopele's full-size file and go exploring the surface of another world. smile.gif
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volcanopele
post Mar 9 2009, 12:00 AM
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Thanks, astro0!

I've gone ahead and posted a version of that mosaic with the Masubi and Pele plumes added in there (required a bit of special processing in addition to the reprojecting of all the images in that mosaic, as well as my thoughts on this, the 30th anniversary of the discovery of volcanism on Io, on the blog:

http://gishbar.blogspot.com/2009/03/30th-a...scovery-of.html


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climber
post Mar 9 2009, 02:04 AM
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Thanks Jason, it brings back old memories.
I first watched "your" IO flight by images and thought "well, I'm sure it's not what I did see at this time on tv"...and I was right when I sew pre fligh by Official images afterwards.
This was a the first truly Jupiter system exploration and IO has been the bigger surprise.
You know what? I had my first car driving course (I was 18) on the very same day Pionner 10 launched to Jupiter (March 3rd 1972) but unfortunately neither Pionner 10 nor 11 showed us such pictures of Jupiter system.
Thanks again for your thread...and we're going back again there, don't we?...I'll be over 70 by then rolleyes.gif


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lyford
post Mar 9 2009, 04:06 AM
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This is truly wonderful, thank you.


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volcanopele
post Mar 9 2009, 04:59 AM
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Wow, this is fun for me too, digging through these old images.

One thing I was shocked to find was incredible images of the Masubi flows field from Voyager 1 :-O Masubi is a semi-persistent plume active along Io's largest active flows around 45 South, 55 West. Now, I always thought our best images were in the 8-10 km range, but I was definitely mistaken. Just found a WAC image showing the Masubi flows field at ~4-5 km/pixel.


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nprev
post Mar 9 2009, 05:09 AM
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The mosaic is beautiful work, Jason; thank you!!!

I'll never forget Mar 5, 1979. The first closeup Io images were just coming in on PBS as I was getting ready to leave for school (sophmore year of HS)...my jaw dropped as a picture formed line-by-line of a fluid outflow pattern of some sort, with Sagan exclaiming 'Oh, wow!' or words to that effect off-camera. Then I had to bolt to school, dammit.


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volcanopele
post Mar 9 2009, 08:36 AM
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Wow, this actually only has a resolution of 2.02 km/pixel. This framelet shows the Masubi flow field and the plume deposit that surrounds the source region. It almost looks like that the main V-shaped flow is disconnected from the rest of Masubi Fluctus. Not sure if this is an artifact of the plume deposit cutting across it or not.
Attached thumbnail(s)
Attached Image
 


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Juramike
post Mar 9 2009, 11:02 AM
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Beautiful work!


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Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Decepticon
post Mar 9 2009, 01:47 PM
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QUOTE
The first closeup Io images were just coming in on PBS


Are these available somewhere online? My searches have come up empty.

I would love to see this.
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tedstryk
post Mar 9 2009, 02:33 PM
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I have been meaning to take a crack at trying to recover some of the underexposed and smeared frames. Jason, that mosaic is spectacular.


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