Landing Site - Unmanned Spaceflight.com

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Landing Site

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ElkGroveDan View Member Profile	Apr 17 2008, 03:01 PM Post #31
Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197	Great image Stu, that definitely has a realistic appearance to it. Alas even at this site there are still boulders to reckon with. -------------------- If Occam had heard my theory, things would be very different now.

Stu View Member Profile	Apr 17 2008, 03:04 PM Post #32
The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60	QUOTE (ElkGroveDan @ Apr 17 2008, 04:01 PM) Great image Stu, that definitely has a realistic appearance to it. Alas even at this site there are still boulders to reckon with. Thanks Yeah, the boulders... just spent half an hour trying to add those realistically and got absolutely nowhere, so in MY world Phoenix lands in a remarkably boulder-free area! -------------------- Homepage Astropoetry "Cumbrian Sky" blog "Road to Endeavour" blog

ElkGroveDan View Member Profile	Apr 17 2008, 03:29 PM Post #33
Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197	That's the right attitude! -------------------- If Occam had heard my theory, things would be very different now.

imipak View Member Profile	Apr 17 2008, 04:05 PM Post #34
Member Group: Members Posts: 646 Joined: 23-December 05 From: Forest of Dean Member No.: 617	QUOTE (Stu @ Apr 17 2008, 03:04 PM) in MY world Phoenix lands in a remarkably boulder-free area! I like this "StuWorld", sounds like the place to be. I bet your Gusev is swept by regular windstorms too, right? These images of terrestrial polygonal terrain posted above, and the HiRISE imagery, is not calming the gathering butterfly storm in my stomach. The boundaries of each 'hexagon' marks a point where frost heave has lifted thesurface of the inner area relative to the border areas (if I have my mental image of the process right?) So far as I can judge scale from Stu and Doug's simulations of Phoenix-by-HiRISE, there's a high probability that the lander will end up either straddling, or leaning down into, the 'ditches' around the polygons. I wonder what the maximum survivable tilt is. Ah well, I suppose that lack of ground truth is what makes any Martian EDL so... "interesting"! -------------------- -- Viva software libre!

Stu

Apr 17 2008, 04:17 PM

Post #35

The Poet Dude

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I must admit I'm struggling to make sense of the scale and nature of things at the Phoenix landing site... I'm going from pictures like these...

The top three images are terrestrial, the lower two crops from HiRISE landing ellipse image... I'm sure someone out there can give us a guide to what we're actually seeing on the HiRISE image..?

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Homepage Astropoetry "Cumbrian Sky" blog "Road to Endeavour" blog

ustrax View Member Profile	Apr 17 2008, 04:25 PM Post #36
Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra \| Portugal Member No.: 228	Stu my friend...a pity you can't compete...why don't you use another identity?... All the others...I'm still waiting for your entries... -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!" Edgar Alan Poe

Phil Stooke View Member Profile	Apr 17 2008, 04:25 PM Post #37
Solar System Cartographer Group: Members Posts: 10265 Joined: 5-April 05 From: Canada Member No.: 227	Well, you got mine! 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)

ustrax View Member Profile	Apr 17 2008, 04:28 PM Post #38
Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra \| Portugal Member No.: 228	QUOTE (Phil Stooke @ Apr 17 2008, 05:25 PM) Well, you got mine! Phil And a winner I must say... Somehow I've got me this strong desire for a cup of good strong coffee... -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!" Edgar Alan Poe

Phil Stooke

Apr 17 2008, 04:34 PM

Post #39

Solar System Cartographer

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Unfortunately I've been disqualified, so I'm posting mine here. Warning, it involves "flagrant digital plagiarism"

Phil

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... 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)

ustrax View Member Profile	Apr 17 2008, 04:37 PM Post #40
Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra \| Portugal Member No.: 228	QUOTE (Phil Stooke @ Apr 17 2008, 05:34 PM) Unfortunately I've been disqualified Disqualified?!! What do you mean by desqualified?!! That was MY favourite so far... Phil just didn't handled the pressure of being a favourite... Just a a teaser for those who haven't sent participations yet, the prizes are being gathered this week at the US to cross the ocean on the upcoming week...these include the posters signed by Peter Smith and some of these beauties... -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!" Edgar Alan Poe

Stu View Member Profile	Apr 17 2008, 06:02 PM Post #41
The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60	QUOTE (Phil Stooke @ Apr 17 2008, 05:34 PM) Unfortunately I've been disqualified, so I'm posting mine here. Warning, it involves "flagrant digital plagiarism" Genius The lawsuit is in the post, by the way. BTW, some good Mars-related blog posts (including Emily's excellent piece on Mars Express images of Phobos) over at this week's Carnival of Space - the 50th! -------------------- Homepage Astropoetry "Cumbrian Sky" blog "Road to Endeavour" blog

imipak View Member Profile	Apr 17 2008, 06:09 PM Post #42
Member Group: Members Posts: 646 Joined: 23-December 05 From: Forest of Dean Member No.: 617	Possibly of no relevance at all (and I know there are lot of other articles where the fulltext IS available), so just FWIW...: http://www.jstor.org/pss/521255 ..describes frost-heave polygons in Antartica "15 to 20m in diameter, and small frost mounds, 1-5m high". 15-20m sounds about right for the scale of some of the HiRISE images Stu's posted here (I think?) - I hope that doesn't imply 1-5m of vertical relief as well... -------------------- -- Viva software libre!

ElkGroveDan

Apr 17 2008, 07:26 PM

Post #43

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OK I'm no Stu, but here's my attempt:

Attached thumbnail(s)

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If Occam had heard my theory, things would be very different now.

ngunn View Member Profile	Apr 17 2008, 07:39 PM Post #44
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542	These images are great fun - thanks all. I notice, though, that while terrestrial poygons tend to be light with dark outlines on Mars it seems to be the other way round. So far I don't see that reflected in the simulated views. And yes, I think they'd be pretty big - maybe only the nearest one or two clearly visible.