Dawn approaches Ceres, From opnav images to first orbit |
Dawn approaches Ceres, From opnav images to first orbit |
Jan 12 2015, 12:10 AM
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Solar System Cartographer Group: Members Posts: 10193 Joined: 5-April 05 From: Canada Member No.: 227 |
On Tuesday (two days from now, for visitors from the future), the first optical navigation image will be taken... hopefully we'll have it in our hands soon after that. So it's time for a new topic. Over the next few months we'll have progressively closer images and full orbit characterization sequences, no doubt including multispectral image sets.
A new world... This is a bit of reprocessing I have been doing with the Hubble images from a few years ago. 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) |
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Mar 3 2015, 09:25 PM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Possibly a reprojection from the perspective view of the camera to orthographic for mapping purposes? That sounds plausible. Can you tell if the distortions look like what you'd get from a reprojection to orthographic? I can't wrap my brain around it. Comparing the two versions of the image mentioned previously, regions in the equatorial latitudes have expanded vertically from the more raw one to the more-resized one, while polar ones have shrunk. Are there any released images of the longitudes east of the bright spots? The global cylindrical map (pia18923) does show the area (in RC2 imagery?), but it has been shrunken down to 739x369 pixels for some reason. Well, the original data would've had a disk about 200 pixels tall, so this is still an enlargement. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Mar 3 2015, 10:01 PM
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Member Group: Members Posts: 715 Joined: 3-January 08 Member No.: 3995 |
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Lo-Fi Version | Time is now: 17th June 2024 - 05:40 AM |
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