MSL - Astronomical Observations, Phobos/Deimos, planetary/celestial observations and more |
MSL - Astronomical Observations, Phobos/Deimos, planetary/celestial observations and more |
May 10 2015, 02:41 PM
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#376
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
Another attempt at the Pleides/Hyades, this time using the four frames that show all of both, and performing rotations and slight rescalings to align the frames better:
(I prefer not to do any "linear filtering" since this way you can identify the stars by eye easily since their trails all have the same direction and length, and the result looks like an actual photograph.) |
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May 13 2015, 10:48 AM
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#377
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
These are from the sol 979 Phobos images, start and end of the sequence. Each image is a composite of five frames.
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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May 13 2015, 03:20 PM
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#378
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Drat those JPEG compression artifacts. We'll have to come back to these when they're in the PDS.
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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May 13 2015, 05:38 PM
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#379
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Member Group: Members Posts: 819 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
Last picture of the sun taken with MC100 at 18h29 local time:
I managed to do an animation of the sunset as seen by the MC100 but I had to blur several pictures to smooth green artifacts. -------------------- |
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May 14 2015, 06:34 PM
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#380
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Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
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May 14 2015, 07:00 PM
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#381
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Member Group: Members Posts: 819 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
I was not satisfied by my animation of sunset pictured by MC100, mainly because I had to blur pictures a lot to remove the green artifacts resulting from debayering process.
This afternoon, I found a nice way to remove the green artifacts with Inpaint plug-in in G'MIC for GIMP. Here is the animation I made after processing each MC100 pictures: -------------------- |
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May 19 2015, 09:56 AM
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#382
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
Phobos just after coming out of eclipse on sol 987. This is a composite of five images.
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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May 19 2015, 11:23 AM
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#383
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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May 19 2015, 11:55 AM
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#384
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Three sol 987 images stacked, with Phobos in the shadow of Mars, rotated 90°:
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May 19 2015, 06:10 PM
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#385
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Using some of the Sol 987 Phobos images to qualitatively simulate stellar occultation data of the Sun by Mars, as seen from Phobos:
Phobos images merged into one image: Phobos images devided by a fully illuminated and respectively registered Phobos image, to remove most surface properties of Phobos, and to reveal the relative intensity of the solar illumination: Median-filtering (above some trigger brighteness of the reference image) on lines perpendicular to the apparent motion of Phobos, values visualized as constant grey-scale along these respective lines: Rotation and some additional displacement trying to adjust for the apparent motion of the Sun, seen from MSL, to get data of the transparency of the Martian atmosphere (qualitative occultation data), for a subset of the images: |
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May 23 2015, 01:22 PM
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#386
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
Back to the Sol 956 sunset for a moment.
Something I've been working on for a bit of fun... a near real-time sunset sequence based on those images. Enjoy the animation Youtube link. NB: Sky and Sun are synthetic. Don't consider this accurate in any way. |
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May 23 2015, 01:51 PM
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#387
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Member Group: Members Posts: 706 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Flawlessly done, and quite moving. Thank you!
John |
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May 23 2015, 09:41 PM
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#388
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
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May 24 2015, 01:49 AM
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#389
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Member Group: Members Posts: 214 Joined: 30-December 05 Member No.: 628 |
The combination of our familiar sun setting towards an alien horizon really makes this scene resonate.
Out of curiosity (small c), I searched for sunset scenes containing another semi-familiar element: clouds. Found only some pre-dawn images from Pathfinder. The page name refers to "sunset" but the only sunset picture seems to be cloudless. http://mars.nasa.gov/MPF/ops/clouds_sunset.html Is there a general tendency for cloud cover to dissipate during the Martian day? |
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May 24 2015, 04:14 AM
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#390
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Stirring, powerful; a fire for the imagination.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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