Juno perijove 4, February 2, 2017 |
Juno perijove 4, February 2, 2017 |
Jan 20 2017, 11:16 PM
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#1
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
It's time to open a perijove-4 thread.
Voting is open for another two days. So, don't hesitate too long. Besides the discussion and the POIs on the mission page, you might consider John Roger's detailed discussion of several interesting features. If everything goes well, all instruments will be switched on. |
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Sep 4 2017, 01:24 PM
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#2
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IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
This is a highly speculative experimental anaglyph based on image PJ04_106:
The feature near the center of the anaglyph is the 'spiral' visible in the cropped image below. The 'spiral' is southwest of oval BA. The full image can be seen in this post. The anaglyph is rendered from a 3D model that was created using shape from shading. The underlying assumption is that at least some of the elongated dark features within the 'spiral' are caused by cloud shadows and differences in vertical relief. These dark features look like shadows and some of the elongated, brighter features look like they might be 'walls' of clouds but this interpretation might be incorrect (this is after all a highly speculative anaglyph). The areas around the 'spiral' are probably less accurate in the anaglyph since most of the dark features there are not shadows. |
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Dec 11 2017, 04:07 PM
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#3
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
Bjorn, I love the anaglyphs.
One possibly helpful suggestion: The non-topographical variation in color of Jupiter's clouds is greater in the blue filter than in the red. So using only the red filter to generate the 3D might generate a cleaner model of the topography. No guarantees, of course! Something I noticed by comparing the two (selecting those two color planes in Photoshop, then desaturating completely) is that it looks like the blue image was taken after the red. There's an apparent flow of just a couple of pixels in places where the swirls suggest motion. Perhaps that is a trompe l'oeil, but one of the images must certainly have been taken first. Anyway, if accurate, do what you will with that information. Now we're going from two dimensions to three and then four! I'll attach a blink gif of those two images and other eyes may see what I'm talking about and more. |
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