Titan from Voyager 1 |
Titan from Voyager 1 |
Nov 27 2016, 05:23 PM
Post
#1
|
|
Junior Member Group: Members Posts: 22 Joined: 13-November 15 Member No.: 7840 |
|
|
|
Nov 28 2016, 03:54 AM
Post
#2
|
|
Member Group: Members Posts: 700 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
That's the north polar hood. The Voyager 1 flyby was just after northern Spring equinox, so the hood from the previous northern winter had not yet dissipated.
John |
|
|
Nov 30 2016, 04:28 AM
Post
#3
|
|
Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
|
|
|
Sep 3 2017, 10:54 PM
Post
#4
|
|
Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
Am I imagining this, or did someone point out some time ago that if you process the living daylights out of Voyager 1 imagery, the northern lakes are just visible? I thought I read this on this forum somewhere, but am having trouble finding it with the search terms I am using, and Google doesn't seem to be my friend either.
|
|
|
Sep 4 2017, 01:27 AM
Post
#5
|
|
Senior Member Group: Members Posts: 2086 Joined: 13-February 10 From: Ontario Member No.: 5221 |
I could swear I remembered a thread too. There is this paper from 2004, though I can't recall finding the thread itself.
|
|
|
Sep 4 2017, 02:21 AM
Post
#6
|
|
Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
i do not think it was titan , but Uranus
you can get a few things out of the 8 bit images for that planet , but most things are just the 8 bit depth |
|
|
Sep 4 2017, 05:38 AM
Post
#7
|
|
Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
I do recall a study which showed very faint dark markings on Titan in Voyager 1 images. Not back in the early 80s, but quite a bit later, I think. And absolutely not the polar lakes, but the areas we now know to be dark sand dunes near the equator. But there was never a clear view of anything, only the very vaguest hint of dark areas. I don't recall any comparison with recent maps.
EDIT - oops, there was a comparison! Here is the paper: http://www.jerichardsonjr.info/Papers/jeri...on_ICAR2004.pdf Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
|
|
Sep 4 2017, 11:30 PM
Post
#8
|
|
Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
This is why I so much hoped to find the digital Pioneer 11 scans. It had a true red channel, so although the resolution was poor, extracting the surface just might be possible.
-------------------- |
|
|
Sep 5 2017, 12:20 AM
Post
#9
|
|
Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
This is why I so much hoped to find the digital Pioneer 11 scans. It had a true red channel, so although the resolution was poor, extracting the surface just might be possible. Really? So what happened? They were received on the ground, but cannot now be found in the archives? |
|
|
Sep 5 2017, 06:51 AM
Post
#10
|
|
Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
Really? So what happened? They were received on the ground, but cannot now be found in the archives? Thank you Seryddwr for your good question. Sometimes, old data cannot now be found in the archives, mainly because it were stored on magnetic tapes, and some of it was lost (or wrongly classified) or even damaged in the storage areas or even erased by other data input. A good example is the famous case of the "Apollo 11 missing tapes" : https://en.wikipedia.org/wiki/Apollo_11_missing_tapes At this time, the NSSDC was not organized to cope with the managing of planetary data and this is why the PDS was created to handle and distribute it. Here are some interesting papers summarizing the history of the PDS and its activities : http://citeseerx.ist.psu.edu/viewdoc/downl...p1&type=pdf https://www.hou.usra.edu/meetings/planetdat...15/pdf/7028.pdf http://www.lpi.usra.edu/pss/mar2015/PDS.pdf Well, tedstryk is UMSF's "imaging wizard"... Who knows ? Just wait : patience is required... |
|
|
Lo-Fi Version | Time is now: 25th May 2024 - 02:31 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. |