Cloud hunting between flybys, more distant views |
Cloud hunting between flybys, more distant views |
Feb 19 2009, 01:59 PM
Post
#1
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
The latest shots of Mezzoramia and environs are nice:
http://saturn.jpl.nasa.gov/multimedia/imag...7/N00131391.jpg I'm not sure if that's a cloud streak on the left. |
|
|
Feb 19 2009, 04:29 PM
Post
#2
|
|
Senior Member Group: Moderator Posts: 3226 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Yeah, those are clouds.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
|
|
Feb 19 2009, 07:16 PM
Post
#3
|
|
Rover Driver Group: Members Posts: 1015 Joined: 4-March 04 Member No.: 47 |
Huh? Are they even aligned E-W? Maybe I'm looking at something else...
|
|
|
Feb 19 2009, 07:56 PM
Post
#4
|
||
Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Same image that Nigel posted, but gamma contrasted, rotated, and annotated view. N is roughly towards the top.
The cloud streaks are faint vertical in this image (at the end of the red arrows). (Hard to tell absolute orientation at these high latitudes, but I think they might be closer to N-S than E-W). -Mike -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
|
|
|
||
Feb 20 2009, 01:44 AM
Post
#5
|
|
Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Mike...
as always your work blows me away... I have to get a new ink cartridge and print head just to keep up with your Huygens image products... Are we not all just chomping at the bit to see how the weather changes come Equinox!!!! Will we start seeing clouds in the 'tropics'? Craig |
|
|
Feb 20 2009, 08:14 AM
Post
#6
|
|
Rover Driver Group: Members Posts: 1015 Joined: 4-March 04 Member No.: 47 |
Exactly... did wind patterns change in the troposphere? Or is it the projection?
|
|
|
Feb 20 2009, 10:11 AM
Post
#7
|
|
Senior Member Group: Moderator Posts: 3226 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Before people start speculating too much, those streaks are E-W. They are just a tad close to the limb there.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
|
|
Feb 20 2009, 11:16 AM
Post
#8
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
From 'looking ahead' for 103 (and 104 is now there too):
"On Feb. 15, ISS will acquire several satellites observations. These include a nine-hour long observation of Titan where ISS will search for clouds and hopefully watch them move across the southern part of the sub-Saturn hemisphere. This distant observation will also provide an opportunity to look at Mezzoramia, a dark albedo region in Titan’s mid-Southern latitudes. Distance to Titan varies during this long observation between 1.2 and 1.37 million kilometers" This suggests that there should be many more images like the one we've been discussing. Were they acquired? |
|
|
Feb 20 2009, 12:01 PM
Post
#9
|
|
Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Before people start speculating too much, those streaks are E-W. They are just a tad close to the limb there. Slightly OT, but is there a way to light up a lat/long grid on a planetary body in Celestia? Also, is there a good surface feature (ISS) map of Titan add-on available for Celestia? -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
|
|
|
Feb 20 2009, 05:11 PM
Post
#10
|
|
Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
Custom overlays allow you to do this Mike : http://www.lepp.cornell.edu/~seb/celestia/...ison/grids.html
|
|
|
Feb 20 2009, 06:13 PM
Post
#11
|
|
Senior Member Group: Moderator Posts: 3226 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Version 1.6, currently in beta, provides support for various overlays, such as body axes, sun direction, and a lat/lon grid.
I have a custom add-on that includes a pair of nice Titan maps that I have been trying to get to more cleaned up state for public release. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
|
|
Feb 21 2009, 03:51 PM
Post
#12
|
|
Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Custom overlays allow you to do this Mike : http://www.lepp.cornell.edu/~seb/celestia/...ison/grids.html Well, thanks for the tip. I installed it and now I can do lat/lon grids for everything but Titan. -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
|
|
|
Feb 22 2009, 05:57 PM
Post
#13
|
||
Member Group: Members Posts: 699 Joined: 1-April 08 From: Minnesota ! Member No.: 4081 |
However one can easily get a blank grid on a planet (say Mars) in Celestia, save it and using coordinates from an existing Titan map (say PIA02147), layer it on Titan images matching several locations using longitude and latitude. Such was done in the animation below. It helps to have the Titan raw image rotated so North is up, same with the Celestia grid.
By the way those streaks sure look like artifacts to me! |
|
|
||
Feb 22 2009, 06:57 PM
Post
#14
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
I think that grid needs rotating clockwise quite a bit.
|
|
|
Feb 22 2009, 07:24 PM
Post
#15
|
|
Member Group: Members Posts: 699 Joined: 1-April 08 From: Minnesota ! Member No.: 4081 |
|
|
|
Lo-Fi Version | Time is now: 29th March 2024 - 10:16 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. |