Voyager and Galileo Images of Ganymede, The Ganymede images and mosaics thread |
Voyager and Galileo Images of Ganymede, The Ganymede images and mosaics thread |
May 18 2007, 09:43 PM
Post
#1
|
|||
IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
I've been processing some of the high resolution Galileo Ganymede images recently. As far as I know the two mosaics below have not appeared at the official websites (at least not in this form) so in a sense they are 'new'.
The first one was obtained during the G1 flyby in 1996. It covers a part of Memphis Facula which is centered at roughly 15°N, 132°W. The images were obtained at a distance of approximately 5000 km from Ganymede's center. The second one was obtained during the G28 flyby in May 2000. It is centered near 14.5°S, 319.7°W. The images making up the mosaic were obtained at a distance of roughly 4500 km from Ganymede's center. I will probably post more Ganymede mosaics later this month or next month. |
||
|
|||
May 20 2007, 01:58 AM
Post
#2
|
||
IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Great work! It really is amazing how many good Galileo mosaics/images never became public release products. Here is one from G-2 (use the link for a higher resolution version). From the G2GSPLMPST01 imaging sequence it seems. Interesting that Ganymede seems to have its own 'look' on this scale. The crater rims seem to be quite rounded, almost eroded in appearance... I have noticed this too. Sublimation is probably significant. However, in some cases the very high contrast between the bright and dark material plays tricks on one's eyes and makes the relief appear greater than it really is. Finally, here's a new one. This is a mosaic of 16 images from the Ganymede 2 G2GSLTDKBD01 imaging sequence obtained on September 6, 1996. The images show an area at ~61°N, ~170°W and were obtained at a distance of ~4300 km from Ganymede's center. North is up and a bit to the left. Many of the images were heavily compressed aboard the spacecraft (several by a factor of more than 20) so compression artifacts are clearly visible. This also significantly reduces the resolution (by a factor of roughly 2-4). This is also apparent in Ted's mosaic above. |
|
|
||
Lo-Fi Version | Time is now: 23rd September 2024 - 10:54 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE 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 funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |