IPB

Welcome Guest ( Log In | Register )

6 Pages V  < 1 2 3 4 5 > »   
Reply to this topicStart new topic
Uranus System Imaging
tedstryk
post Aug 19 2010, 01:07 AM
Post #31


Interplanetary Dumpster Diver
****

Group: Moderator
Posts: 4241
Joined: 17-February 04
From: Powell, TN
Member No.: 33



Very nice work.


--------------------
Go to the top of the page
 
+Quote Post
antipode
post Aug 19 2010, 02:58 AM
Post #32


Member
***

Group: Members
Posts: 151
Joined: 1-October 06
Member No.: 1206



Ditto.

Im enjoying this thread, and enjoying the better press Uranus is finally getting lately (jokes aside, I think the active equinox atmosphere has helped silence the 'totally bland' press the planet has had since 1986).

Back to the moons. I wonder (Wunda? rolleyes.gif ) how many decades it will be before we get a better peek at Umbriel's strange Wunda? Looks very Iapetaen.

P
Go to the top of the page
 
+Quote Post
ugordan
post Aug 19 2010, 07:32 AM
Post #33


Senior Member
****

Group: Members
Posts: 3568
Joined: 1-October 05
From: Croatia
Member No.: 523



QUOTE (machi @ Aug 19 2010, 02:08 AM) *
Three images of Titania.

Is the color shift to red/pink near the terminator real or an artifact?


--------------------
Go to the top of the page
 
+Quote Post
machi
post Aug 19 2010, 10:34 AM
Post #34


Member
***

Group: Members
Posts: 646
Joined: 27-February 08
From: Heart of Europe
Member No.: 4057



Ted: Thanks!

Antipode:
I'm always enjoying work with Uranus moons, I hope this is another small piece of work which leads to support new mission to these strange lands.
"Wunda? Looks very Iapetaen" I think so too smile.gif.

Ugordan:
All three images shares same color data from medium resolution image.
I used different processing technique to highest resolution image which leads to slightly bigger color differences.
So I think color shift is real, but slightly more enhanced than on another two images (and terminator regio isn't so good visible on these two images).


--------------------
Go to the top of the page
 
+Quote Post
tedstryk
post Aug 19 2010, 05:26 PM
Post #35


Interplanetary Dumpster Diver
****

Group: Moderator
Posts: 4241
Joined: 17-February 04
From: Powell, TN
Member No.: 33



I have also noticed the color shift.


--------------------
Go to the top of the page
 
+Quote Post
ugordan
post Aug 19 2010, 05:49 PM
Post #36


Senior Member
****

Group: Members
Posts: 3568
Joined: 1-October 05
From: Croatia
Member No.: 523



It looks like a calibration artifact at first, but then if you look closer it looks like an albedo feature as it extends clockwise all the way to the sunlit limb at 5 o'clock. I think that's the most color variation I've seen on Uranus' moons.


--------------------
Go to the top of the page
 
+Quote Post
Stu
post Aug 19 2010, 05:58 PM
Post #37


The Poet Dude
****

Group: Moderator
Posts: 5548
Joined: 15-March 04
From: Kendal, Cumbria, UK
Member No.: 60



You see? THIS is why I love UMSF so much... You Image Mages delve into the misty archives, drop the old, forgotten images dumped there into your cauldrons, give a good stir and whumpf! out come amazing new views of these distant worlds... ohmy.gif

Many thanks for sharing these beautiful pics, guys.


--------------------
Go to the top of the page
 
+Quote Post
machi
post Aug 19 2010, 07:32 PM
Post #38


Member
***

Group: Members
Posts: 646
Joined: 27-February 08
From: Heart of Europe
Member No.: 4057



Ugordan, Tedstryk:
In case of color shift near the terminator, I think that's combination of imperfections of calibration (which are more evident at low brightness level) and real surface color. I looked at maps and redder hemisphere is around 90° longitude. I think it's the leading hemisphere.

Stu:
Image Mage, nice phrase smile.gif
"forgotten images dumped there into your cauldrons"
My secret ingredient is bat's ear but keep it under your hat smile.gif

Last in set - Oberon.
Resampled at 3 km/pix. Real resolution 7 km/pix.
Attached thumbnail(s)
Attached Image
 


--------------------
Go to the top of the page
 
+Quote Post
ugordan
post Aug 22 2010, 04:44 PM
Post #39


Senior Member
****

Group: Members
Posts: 3568
Joined: 1-October 05
From: Croatia
Member No.: 523



Here's a color version of Titania using calibrated data from the PDS rings node:
Attached Image


Left is gamma-correct, right is contrast enhanced.
While that calibrated data set is known to have calibration issues and is not the greatest quality Voyager ISS data set in the world, it appears to be missing the color shift around the terminator.

Taking a quick look in green+violet (as well as using clear as an effectively 460 nm filter) color of all the moons, Miranda, Ariel and Umbriel appear to be effectively grey (Umbriel the most), while Oberon and Titania have that slight brownish tint to them.


--------------------
Go to the top of the page
 
+Quote Post
sariondil
post Nov 10 2010, 02:39 PM
Post #40


Newbie
*

Group: Members
Posts: 15
Joined: 28-November 08
From: Germany
Member No.: 4498



Machi´s version of the Oberon data set can be used to add a tiny bit of coverage along the terminator of Steve Albers´ map. I assume the color processing is different and just roughly adjusted the brightness.
While I´m at it, here´s a quick reprojection of the Titania nightside coverage dicovered by Ted Stryk onto Steve´s map (looks slightly mismatched, but dayside features line up in this position).
Attached thumbnail(s)
Attached Image
Attached Image
 
Go to the top of the page
 
+Quote Post
machi
post Apr 13 2011, 04:01 PM
Post #41


Member
***

Group: Members
Posts: 646
Joined: 27-February 08
From: Heart of Europe
Member No.: 4057



Anaglyph of Titania. It's based on synthetic frame between last two high resolution Voyager images of Titania.
Edges were removed.
Attached thumbnail(s)
Attached Image

 


--------------------
Go to the top of the page
 
+Quote Post
algorimancer
post Apr 13 2011, 04:27 PM
Post #42


Member
***

Group: Members
Posts: 587
Joined: 20-April 05
From: League City, Texas
Member No.: 285



QUOTE (machi @ Apr 13 2011, 10:01 AM) *
Anaglyph of Titania.

The fractures certainly stand out. A bit more topographic height than I would have expected. Neat.
Go to the top of the page
 
+Quote Post
machi
post Apr 14 2011, 08:56 PM
Post #43


Member
***

Group: Members
Posts: 646
Joined: 27-February 08
From: Heart of Europe
Member No.: 4057



Cross-eye stereo image of Titania. Synthetic image is more precise than that one in previous anaglyph.
Resampled to ~2 km/pix. Edges were cropped from synthetic image.
Attached thumbnail(s)
Attached Image
 


--------------------
Go to the top of the page
 
+Quote Post
nprev
post Apr 15 2011, 01:01 AM
Post #44


Senior Member
****

Group: Moderator
Posts: 7087
Joined: 8-December 05
From: Los Angeles
Member No.: 602



Daniel, you're a wizard. These are AMAZING.


--------------------
A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Apr 16 2011, 02:24 AM
Post #45


IMG to PNG GOD
****

Group: Moderator
Posts: 1508
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



Agreed, this is amazing. Interestingly the anaglyph reveals that the surface is a bit depressed farther away from the big fracture than can be easily seen in the original imagery.

I want a Uranus orbiter! ;-)
Go to the top of the page
 
+Quote Post

6 Pages V  < 1 2 3 4 5 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 23rd October 2014 - 04:34 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.