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New Horizons at Europa
elakdawalla
post Mar 29 2007, 09:58 PM
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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.
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volcanopele
post Mar 30 2007, 05:40 AM
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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?


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alan
post Mar 30 2007, 07:42 AM
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QUOTE (volcanopele @ Mar 30 2007, 12:40 AM) *
Very cool, Emily

Alright, who are you and what did you do with the real volcanopele. ph34r.gif
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ugordan
post Mar 30 2007, 08:47 AM
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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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elakdawalla
post Mar 30 2007, 02:44 PM
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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.

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john_s
post Mar 30 2007, 04:00 PM
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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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ugordan
post Mar 30 2007, 05:40 PM
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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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Phil Stooke
post Apr 2 2007, 12:57 PM
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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

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punkboi
post Apr 2 2007, 05:59 PM
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New image of Io and Europa next to each other in MVIC image!

http://pluto.jhuapl.edu/gallery/missionPho...ges/040207.html


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John Flushing
post Apr 2 2007, 06:06 PM
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ugordan
post Apr 2 2007, 06:08 PM
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Beautiful!

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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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helvick
post Apr 2 2007, 06:10 PM
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And a shout out to Hendric too in the comments, this is the first of the Hendric Moments. smile.gif

Nice. I hope you are getting lots of copies to show folks. Magical.
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paxdan
post Apr 2 2007, 06:24 PM
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Kudos to hendric and kudos to the new horizon team for making this possible.
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hendric
post Apr 2 2007, 09:13 PM
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Ah man, I didn't do anything except run a few spreadsheets. smile.gif 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! smile.gif

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! smile.gif


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djellison
post Apr 2 2007, 09:35 PM
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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 smile.gif

DOug
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