IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
Voyager and Galileo Images of Callisto, The Callisto images and mosaics thread
mgrodzki
post Mar 11 2007, 02:46 PM
Post #1


Member
***

Group: Members
Posts: 121
Joined: 26-September 05
From: New York City
Member No.: 507



When looking for good global images of Callisto… i keep seeing the same 2 or 3 and they look false color (especially from voyager). does callisto suffer from the lack of global images as europa does? also wondering if any of you magicians have worked your magic on any callisto images that are not in the mainstream.


--------------------
Go to the top of the page
 
+Quote Post
Decepticon
post Mar 11 2007, 05:28 PM
Post #2


Senior Member
****

Group: Members
Posts: 1224
Joined: 25-November 04
Member No.: 114



How about this?
Go to the top of the page
 
+Quote Post
tedstryk
post Mar 11 2007, 07:59 PM
Post #3


Interplanetary Dumpster Diver
****

Group: Moderator
Posts: 4393
Joined: 17-February 04
From: Powell, TN
Member No.: 33



Well, there is this shot from Voyager:



Here is a Galileo shot (The only global view, other than a very distant one).



Here is another Galileo shot, processed by me.



--------------------
Go to the top of the page
 
+Quote Post
elakdawalla
post Mar 11 2007, 11:15 PM
Post #4


Administrator
****

Group: Admin
Posts: 5166
Joined: 4-August 05
From: Pasadena, CA, USA, Earth
Member No.: 454



Nice as usual, Ted. When was that second Galileo one taken?

--Emily


--------------------
My blog - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
Go to the top of the page
 
+Quote Post
tedstryk
post Mar 12 2007, 12:13 AM
Post #5


Interplanetary Dumpster Diver
****

Group: Moderator
Posts: 4393
Joined: 17-February 04
From: Powell, TN
Member No.: 33



The one I processed is from I31 (with Voyager color). The Galileo photojournal image is from C30.


--------------------
Go to the top of the page
 
+Quote Post
mgrodzki
post Mar 12 2007, 12:53 AM
Post #6


Member
***

Group: Members
Posts: 121
Joined: 26-September 05
From: New York City
Member No.: 507



yeah, that half phase one is something i have never seen before. it reminds me of your europa and ganymede half phase images. io would make a nice complete set!


--------------------
Go to the top of the page
 
+Quote Post
mgrodzki
post Mar 12 2007, 12:56 AM
Post #7


Member
***

Group: Members
Posts: 121
Joined: 26-September 05
From: New York City
Member No.: 507



Here is a Galileo shot (The only global view, other than a very distant one).


that's the one i see all the time. those colors are whack… i guess there was missing info in that which makes the edges blue? seems like the same problem with the more well-known europa images too.


--------------------
Go to the top of the page
 
+Quote Post
tedstryk
post Mar 12 2007, 02:44 AM
Post #8


Interplanetary Dumpster Diver
****

Group: Moderator
Posts: 4393
Joined: 17-February 04
From: Powell, TN
Member No.: 33



QUOTE (mgrodzki @ Mar 12 2007, 12:56 AM) *
Here is a Galileo shot (The only global view, other than a very distant one).


that's the one i see all the time. those colors are whack… i guess there was missing info in that which makes the edges blue? seems like the same problem with the more well-known europa images too.


It is based on a real variation. It is just over-enhanced, and probably Violet-Green-Infrared color.


--------------------
Go to the top of the page
 
+Quote Post
JRehling
post Mar 12 2007, 02:50 AM
Post #9


Senior Member
****

Group: Members
Posts: 2197
Joined: 20-April 05
Member No.: 321



It's kind of amusing how similar in appearance Mercury and Callisto are, besides being virtually identical in size. But what a difference otherwise.
Go to the top of the page
 
+Quote Post
tedstryk
post Mar 13 2007, 12:38 PM
Post #10


Interplanetary Dumpster Diver
****

Group: Moderator
Posts: 4393
Joined: 17-February 04
From: Powell, TN
Member No.: 33



I have done my own version of the C30 image. It turns out the "red" channel is IR-9680, so my "red" for doing the color here is a blend of the green channel and IR-9680, to try to approximate red. For the grayscale, I used the IR-9680 data more heavily, as the dataset, like most Galileo sets, is very limited, so I needed it to bolster the image clarity. This is at the original image scale. The quality of the original images is too poor of super-resolution (in fact, it was hard to make it look decent without shrinking it).


--------------------
Go to the top of the page
 
+Quote Post
PhilHorzempa
post Jun 3 2007, 08:40 PM
Post #11


Member
***

Group: Members
Posts: 167
Joined: 17-March 06
Member No.: 709



Great work on the Callisto global views!

Now a request for the UMSF photo-magicians --
Have you assembled mosaics from
the High Resolution close-up images of Callisto from Galileo?


Another Phil
Go to the top of the page
 
+Quote Post
MarcF
post May 29 2019, 08:30 PM
Post #12


Member
***

Group: Members
Posts: 220
Joined: 16-May 06
From: Geneva, Switzerland
Member No.: 773



A long time ago, I was used to visit the Callisto Crater Database by LPI: https://www.lpi.usra.edu/resources/cc/cchome.html. It contains images and information about the 150 major impact craters on Callisto. A similar database about craters on Ganymede also exists: https://www.lpi.usra.edu/resources/gc/gchome.html.
To my surprise, both are still accessible (as well as a third database about Venusian craters). As a biological database curator, I'm aware that maintaining and updating such databases is a big work, but I think it is a pity that they have never been updated with Galileo data. Many pics, new names and other information could have been added. Is there any chance this could happen once in the future ?
Regards,
Marc.
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 8th December 2019 - 07:36 PM
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.