New Horizons at Europa |
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New Horizons at Europa |
 Mar 29 2007, 09:58 PM
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#31
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 Administrator  Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454  |
There's now 7 separate Europa observations up on the SOC page; by my count we're waiting for 5 more, most of them taken after the 7 shown here. Here's an animation of the 7 we've got (click to animate). I tried to set them all to have roughly similar histograms. Many of the observations have two different exposures, 5 and 10 milliseconds, to look at terminator topography. I tried to merge some detail along the terminator from the 10-millisecond exposures with the 5-millisecond exposures, but after a bit of futzing with it I wasn't achieving anything that looked much better than the 5-millisecond exposures by themselves.
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Mar 30 2007, 05:40 AM
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#32
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 Senior Member Group: Moderator Posts: 3232 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Very cool, Emily. Going off your idea, I've created a movie of the Io images uploaded thus far.
Any sign of the great circle topography the NH folks were looking for? -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Mar 30 2007, 07:42 AM
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#33
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 Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
QUOTE (volcanopele @ Mar 30 2007, 12:40 AM)  Very cool, Emily Alright, who are you and what did you do with the real volcanopele. 
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Mar 30 2007, 08:47 AM
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#34
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 Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (volcanopele @ Mar 30 2007, 06:40 AM) Any sign of the great circle topography the NH folks were looking for? Seeing the images so far, I kind of have trouble imagining any topography (especially as subtle as the "crop circles") will be easy to make out. Looking forward to be proven wrong. -------------------- |
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Mar 30 2007, 02:44 PM
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#35
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
QUOTE (volcanopele @ Mar 29 2007, 10:40 PM) Any sign of the great circle topography the NH folks were looking for? I did find the terminator to be a little less perfect-shaped than I would expect for the solar system's smoothest moon, but I think that the interesting stuff will be buried in the fine details of the pixel values in the non-JPEGged images. --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Mar 30 2007, 04:00 PM
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#36
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 Member Group: Members Posts: 699 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
I think we'll need to subtract out the albedo features (which we can do using high-sun Galileo images of the same regions) in order to see the topography...
John. |
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Mar 30 2007, 05:40 PM
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#37
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (john_s @ Mar 30 2007, 05:00 PM) I think we'll need to subtract out the albedo features (which we can do using high-sun Galileo images of the same regions) in order to see the topography... Regarding that, just what is the S/N ratio you achieved with Europa, seeing how low exposures were needed and Europa being a pretty high albedo body? -------------------- |
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Apr 2 2007, 12:57 PM
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#38
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Solar System Cartographer Group: Members Posts: 10149 Joined: 5-April 05 From: Canada Member No.: 227 |
This image is a comparison between a NH image of Europa (not necessarily the best!) and a Galileo image reduced to the same scale and contrast. Three parallel troughs near the terminator (ringed in the right-hand image) are parts of one of the 'crop circles'. You can see how difficult they will be to isolate visually. But I would say they should be relatively easy to spot when Galileo albedo images are subtracted.
Phil
-------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke 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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Apr 2 2007, 05:59 PM
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#39
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 Member Group: Members Posts: 540 Joined: 25-October 05 From: California Member No.: 535 |
New image of Io and Europa next to each other in MVIC image!
http://pluto.jhuapl.edu/gallery/missionPho...ges/040207.html -------------------- 2011 JPL Tweetup photos: http://www.rich-parno.com/aa_jpltweetup.html
http://human-spaceflight.blogspot.com |
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| Guest_John Flushing_* |
Apr 2 2007, 06:06 PM
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#40
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Guests |
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Apr 2 2007, 06:08 PM
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#41
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Beautiful!
QUOTE This particular scene was suggested by space enthusiast Richard Hendricks of Austin, Texas, in response to an Internet request by New Horizons scientists for evocative, artistic imaging opportunities at Jupiter. What an honor! -------------------- |
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Apr 2 2007, 06:10 PM
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#42
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 Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
And a shout out to Hendric too in the comments, this is the first of the Hendric Moments.
 Nice. I hope you are getting lots of copies to show folks. Magical. |
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Apr 2 2007, 06:24 PM
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#43
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 Member Group: Members Posts: 562 Joined: 29-March 05 Member No.: 221 |
Kudos to hendric and kudos to the new horizon team for making this possible.
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Apr 2 2007, 09:13 PM
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#44
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 Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
Ah man, I didn't do anything except run a few spreadsheets.
It sure is a damn fine image! Kudos to the NH team! John sent me a copy of this last week, and it was excrutiating not to talk about it! And now I can change out my avatar! Let me just say that with the 5 minutes of fame from Emily's story, and the 10 minutes from this one, I am now Space Enthusiast Richard Hendricks forever!
-------------------- Space Enthusiast Richard Hendricks
-- "The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke Mother Nature is the final inspector of all quality. |
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Apr 2 2007, 09:35 PM
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#45
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Major major kudos to Alan, John and Space Enthusiast Richard Hendricks...don't know if I should be, but I'm sort of proud of that image.
I've given Space Enthusiast Richard Hendricks a new forum title DOug |
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