Spirit retrospective, - a few details from my current project |
Spirit retrospective, - a few details from my current project |
Jun 4 2012, 08:51 AM
Post
#31
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Thanks Phil and fredk. Unfortunately the links in the old thread no longer seem to work so I'm still not sure how thoroughly and securely distant horizon features were identified back then. First impression is that Spirit's visibility range probably exceeded Opportunity's Miyamoto sighting in several directions, though only by a few km. If she broke the 100km mark anywhere it was most likely to the S but it's not possible to tell without closer scrutiny of the terrain out there.
|
|
|
Jun 4 2012, 02:17 PM
Post
#32
|
|
Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
Yes, it's sad to go back and see all the things that have disappeared.
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 PDF: 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) |
|
|
Jun 4 2012, 03:54 PM
Post
#33
|
|
Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
Imagehost, XS and others have all gone away or have a policy of deleting older content. It's a shame, but that's the risk you run with free hosting facilities.
|
|
|
Jun 9 2012, 03:21 PM
Post
#34
|
|||
Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
If anyone's curious, here are a couple of the images from that old thread, resurrected from the cobwebby depths of my harddrive:
Those are the only Gusev rim related pics I kept from that thread. It is a shame indeed about the hosting site. Even more so since these images were tiny - there was no reason not to put them on UMSF in the first place! |
||
|
|||
Jun 9 2012, 04:01 PM
Post
#35
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Well rescued! There's all the information I was after right there - a useful complement/comparison with Phil's excellent summit pan.
|
|
|
Jun 9 2012, 07:17 PM
Post
#36
|
|||
Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
So as far as seeing outside of Gusev, I've marked three locations on the view map:
We can clearly see the far rim of the smaller crater (New Plymouth?) at A. This map predicts that we should be able to see a bit farther to another smaller crater rim at B, but it's not clear to me whether we can see that in Phil's horizon pan or not. I also wonder whether we can see some uncertain distance up Ma'adim Vallis to perhaps one of its walls, towards C. That would be somewhere around here on Phil's pan: Unfortunately part of the Columbia Hills is in the way. But maybe there are pancam images that were taken from farther west (on approach to the summit) that would be unobstructed? Phil: any chance you could post your original rectangular horizon pan at full res? Perhaps cropping out the foreground if the filesize is too big? |
||
|
|||
Jun 9 2012, 07:35 PM
Post
#37
|
|
Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
Will do when I get to the office on Monday.
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 PDF: 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) |
|
|
Jun 9 2012, 09:31 PM
Post
#38
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
We can clearly see the far rim of the smaller crater (New Plymouth?) at A. This map predicts that we should be able to see a bit farther to another smaller crater rim at B, but it's not clear to me whether we can see that in Phil's horizon pan or not. B would, I think, break 100km but I wouldn't be surprised if it's not actually visible. If I remember rightly pgrindrod's visibility maps neglected the curvature of Mars. He was mainly concerned with closer features so that was fair enough. There's no way of knowing whether this one does or not. It's worth a thorough look though. C: The view down the valley is definitely worth exploring in detail. If the most distant point on the horizon lies in that direction it should be possible to pinpoint the location and distance with the information available. |
|
|
Jun 9 2012, 09:39 PM
Post
#39
|
|
Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
There's no way of knowing whether this one does or not. From the first post by erwin in that old thread:QUOTE I use 128 pixel/degrees data, cropped gusev area, sphericise the heights according to Mars diameter. So it seems he did take curvature into account.Also, he says he cropped on Gusev, so any distant far wall of the Vallis may be outside of his cropped region. So his rendering of the C region may not show a distant wall that's actually visible... |
|
|
Jun 10 2012, 01:03 PM
Post
#40
|
|
Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
One other thing which I have not done yet... these images were part of the Everest panorama taken on sols 620-622, and it was multispectral. Some bands were subsampled images but three were full resolution. So it would be possible to take all three full res bands at 16 bit from PDS and stretch to optimize the distant features, and then merge them to increase signal. That might help reveal details on the distant rim.
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 PDF: 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) |
|
|
Jun 11 2012, 02:25 PM
Post
#41
|
||
Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
OK, here is a cropped version of my full horizon panorama. It's quite dirty, and got cleaned up quite a bit for the circular view. It really is quite hard to pull out that very faint detail.
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 PDF: 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) |
|
|
||
Jun 11 2012, 04:47 PM
Post
#42
|
|
Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
That's awesome!!
|
|
|
Jun 11 2012, 05:20 PM
Post
#43
|
|
Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
Ugliest pan ever!
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 PDF: 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) |
|
|
Jun 11 2012, 08:01 PM
Post
#44
|
|
Member Group: Members Posts: 194 Joined: 3-January 10 Member No.: 5156 |
Ugliest pan ever! No, it is just one of the best panoramas ever seen on Mars, Thx for it! -------------------- Need more input ...
|
|
|
Jun 11 2012, 08:55 PM
Post
#45
|
|
Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
Cool, ugly panorama!
So many peaks everywhere! -------------------- |
|
|
Lo-Fi Version | Time is now: 23rd September 2024 - 09:00 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. |