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Unmanned Spaceflight.com > All posts by a member| Posted on: Jul 10 2007, 03:46 AM | |
 Lord Of The Uranian Rings  Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 
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Steve, Could your problems be caused by the fact that Iapteus isn't perfectly spherical? I imagine that might cause some significant distortions in your image reprojections. Ian. |
| Forum: Cassini's ongoing mission and raw images · Post Preview: #94583 · Replies: 171 · Views: 134868 |
| Posted on: Jul 9 2007, 10:30 AM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Here's my version, consisting of 12 stacked images, plus a simple histogram stretch:
It seems like the brightness of the impact basin in the previous set of images was purely due to the phase angle, as opposed to a genuine intrinsic difference. |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #94526 · Replies: 171 · Views: 134868 |
| Posted on: Jun 27 2007, 04:26 PM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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TRITON (northern hemipshere) (JPL / William Johnston / A. Tayfun Oner / Steve Albers)
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| Forum: Uranus and Neptune · Post Preview: #93615 · Replies: 66 · Views: 131664 |
| Posted on: Jun 27 2007, 04:24 PM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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TRITON (southern hemipshere) (JPL / William Johnston / A. Tayfun Oner / Steve Albers):
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| Forum: Uranus and Neptune · Post Preview: #93614 · Replies: 66 · Views: 131664 |
| Posted on: Jun 27 2007, 04:22 PM | |||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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UMBRIEL (southern hemipshere) (Philip Stooke):
OBERON (southern hemipshere):
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| Forum: Uranus and Neptune · Post Preview: #93613 · Replies: 66 · Views: 131664 |
| Posted on: Jun 27 2007, 04:19 PM | |||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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ARIEL (southern hemisphere):
TITANIA (southern hemisphere):
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| Forum: Uranus and Neptune · Post Preview: #93611 · Replies: 66 · Views: 131664 |
| Posted on: Jun 27 2007, 04:16 PM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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All of the following polar projections were generated using the cylindrical maps created by Steve Albers (unless otherwise credited): MIRANDA (southern hemisphere) (JPL):
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| Forum: Uranus and Neptune · Post Preview: #93609 · Replies: 66 · Views: 131664 |
| Posted on: Jun 25 2007, 12:42 PM | ||||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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I'm not sure how useful this will be, but here's my attempt at combining the ISS and VIMS mosiacs of Titan:
The original ISS image (thanks Steve!):
The original VIMS from the JPL Photojournal (latitude and longitude lines removed):
Ian. |
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| Forum: Titan · Post Preview: #93381 · Replies: 275 · Views: 451677 |
| Posted on: Jun 24 2007, 12:10 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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That's marvellous Ted. Speaking of Triton, have you considered recreating the view of an ancient Tritonian crater I mentioned in this thread: http://www.unmannedspaceflight.com/index.p...ost&p=92193 |
| Forum: Uranus and Neptune · Post Preview: #93338 · Replies: 66 · Views: 131664 |
| Posted on: Jun 24 2007, 02:03 AM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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With regards to the difficulties posed by the logistics of getting so many books signed in so many parts of the globe, I think I have a cunning plan that could prove to be a viable solution. "What?" I hear you ask. "Is it as cunning as a fox who's just been appointed Professor of Cunning at Oxford University?" Well, possibly. How about Phil buys a pack of 'sticky labels', one of which he could sign every time someone here on UMSF wants a genuine Stooke signature in his or her copy of the atlas (all for a small fee, of course). Upon receipt of the signed label, they could stick it inside the book (or even on a body part of their own choosing). This cunning scheme would save the ridiculous amount of money invested in sending such a hefty tome back and forth through the post. Any thoughts, Phil?  |
| Forum: Conferences and Broadcasts · Post Preview: #93322 · Replies: 83 · Views: 75397 |
| Posted on: Jun 21 2007, 10:08 AM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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As the President of the International Philip Stooke Fanclub, can I be expecting a free copy Phil?  |
| Forum: Conferences and Broadcasts · Post Preview: #93015 · Replies: 83 · Views: 75397 |
| Posted on: Jun 20 2007, 07:50 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Good grief - small moons, big disputes!  |
| Forum: Cassini general discussion and science results · Post Preview: #92908 · Replies: 20 · Views: 18076 |
| Posted on: Jun 20 2007, 04:43 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Are we allowed to say 'smeg' on this board, Doug?  |
| Forum: MSL · Post Preview: #92869 · Replies: 34 · Views: 42830 |
| Posted on: Jun 20 2007, 04:35 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Holy moly - it's a MONSTER!  Excellent report Emily (and great new portrait, if I may say so  ). The Pluto rover looks interesting too - are there any tentative plans to send smaller vehicles of this sort to Mars en masse? They would be great for scouting missions; looking for suitable locations for a MSL class rover to explore in more detail. Ian. |
| Forum: MSL · Post Preview: #92867 · Replies: 34 · Views: 42830 |
| Posted on: Jun 20 2007, 03:47 AM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Emily, I hope you don't mind, but I took your image and adjusted the R/G/B levels until the colours matched Bjorn's composite:
I'd also like to congratulate you on an excellent tutorial. The only possible addition I can think of at this time is to mention the alternative to the 'Difference' layer attribute that I use. Changing the top layer opacity to 50%, as well as converting it to a negative image, is the best way to accurately align two layers(in my opinion). Ian. |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #92809 · Replies: 358 · Views: 363573 |
| Posted on: Jun 17 2007, 09:26 PM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Good stuff Bjorn!
http://space.jpl.nasa.gov/cgi-bin/wspace?t...=1&showsc=1 Looks convincing to me, Ken. Ian. |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #92635 · Replies: 358 · Views: 363573 |
| Posted on: Jun 15 2007, 09:50 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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I have some of that footage Jason (from the 1989 BBC Horizon documentary on the Neptune encounter). Among those visible are Carolyn Porco, Ed Stone, Carl Sagan, Torrence Johnson, Brad Smith and many others too. Ian. |
| Forum: Chit Chat · Post Preview: #92586 · Replies: 27 · Views: 22515 |
| Posted on: Jun 13 2007, 04:09 PM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Here's a version of the picture created from several stacked images. The noise has been removed from each indivdual layer:
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #92298 · Replies: 55 · Views: 45755 |
| Posted on: Jun 13 2007, 03:00 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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It's the real deal all right - a mosaic of 10 Voyager frames: QUOTE The image shows Uranus with its ring system and the 10 innermost satellites. All but S/1986 U 10 were known at the time the image was taken, based on Voyager images taken in January 1986. Arrows at the edge of the image point to the 10 satellites. The other dots of light are background stars of the constellation Sagittarius. (If you know enough astronomy to want to look this up on a star chart, the bright star next to Juliet is Kaus Borealis, Lambda Sagittarii.) ... The new discovery image is a mosaic of 10 exposures, Karkoschka said. The exposures of Uranus had shorter exposure times than the exposures of the surrounding area containing the rings and satellites. Since Uranus is a million times brighter than its satellites, Karkoschka retained the darker planet image so the satellites would be visible. ... The colors in the image are close to realistic, he added. http://nssdc.gsfc.nasa.gov/planetary/text/...pr_19990518.txt |
| Forum: Voyager and Pioneer · Post Preview: #92286 · Replies: 17 · Views: 28943 |
| Posted on: Jun 13 2007, 06:25 AM | ||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Here's the discovery image of Perdita (1986U10) - quite an amazing picture:
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| Forum: Voyager and Pioneer · Post Preview: #92245 · Replies: 17 · Views: 28943 |
| Posted on: Jun 12 2007, 09:01 PM | ||||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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And a couple of shots of the Voyager 1 OPNAV image in which Linda Morabito discovered two active volcanoes:
The last one is very 1970s! |
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| Forum: Image Processing Techniques · Post Preview: #92194 · Replies: 5 · Views: 13153 |
| Posted on: Jun 12 2007, 08:47 PM | ||||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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The following screenshots are taken from a UK TV documentary on the Neptune encounter. Candy Hansen cuts up a printout of a Voyager 2 image of Triton in an attempt to reconstruct an ancient crater that was subsequently destroyed by tectonic activity:
Ian. |
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| Forum: Image Processing Techniques · Post Preview: #92193 · Replies: 5 · Views: 13153 |
| Posted on: Jun 8 2007, 08:45 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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I honestly thought this was an April Fools joke when I clicked on the link. I had to double-check the date of the article, just to make sure.  |
| Forum: Opportunity · Post Preview: #91915 · Replies: 88 · Views: 102799 |
| Posted on: Jun 5 2007, 09:56 PM | |
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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QUOTE (ugordan @ Jun 5 2007, 10:27 PM)  Nice! Is the first image RGB or IR/G/UV? Gordan. It's just a plain ol' RGB composite.  Also, is it just the viewing geometry, or does there appear to be significantly 'yellowy' areas both north and south of the band? They show-up quite nicely in Bjorn's enhanced image. Ian. |
| Forum: Cassini's ongoing mission and raw images · Post Preview: #91656 · Replies: 64 · Views: 60958 |
| Posted on: Jun 5 2007, 08:44 PM | |||
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437
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Here's my attempt at constructing a global colour view of Tethys, using the latest RAWs. The bluish band stands out quite nicely:
This is an enhanced version, which really brings out the difference in colour between the band and the surrounding terrain:
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #91645 · Replies: 64 · Views: 60958 |
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