Phoenix - spring images, HiRISE views of Phoenix after the long, long winter |
Phoenix - spring images, HiRISE views of Phoenix after the long, long winter |
Oct 26 2009, 02:14 PM
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Doug just said in another thread that he was looking for Phoenix in the new images and couldn't find it. Well, I love a challenge. So here it is:
Close-up: (REMOVED - SEE LATER POST) Context: (REMOVED - SEE LATER POST) Note that map-projected HiRISE images at this latitude are in polar stereographic projection, not a cylindrical projection. North is at the left. You might not believe this, but by blinking layers like Clyde Tombaugh I think I can match numerous points, not just the hardware. EDIT: I was a bit off. Correct locations are shown below. 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) |
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Jan 27 2010, 03:41 AM
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Martian Photographer Group: Members Posts: 353 Joined: 3-March 05 Member No.: 183 |
I don't know the details of the passes, but expect they had a reasonably good sampling of local time. It's around a 5AM/PM orbit, but the polar latitude makes many more times accessible. During the mission, it was occasionally possible to use 3 or 4 consecutive ODY passes (every two hours through the afternoon and evening in that case), and that was for a higher bit-rate than would be in play now.
Hmm. 30 passes in ~3 sols would be all or most opportunities--you could get roughly every hour of the sol, with some resampling, with numbers like that. |
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Jan 27 2010, 03:57 AM
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
30 passes in ~3 sols would be all or most opportunities--you could get roughly every hour of the sol, with some resampling, with numbers like that. Right, but each pass only lasts a max of 7-10 minutes, and I don't know what duty cycle of transmission they were using (since I can't find any documentation that such a mode even existed.) Maybe they send tone for a few seconds every few minutes? Mark, do you know anything about this mode? -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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