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: 10162 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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Jan 23 2015, 08:54 PM
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
GRAND basically observes the whole planet at one time, so to improve resolution you have to observe, observe, observe, with multiple overlapping orbits. Its simply the more the better. Its all mysterious to me, but it works. which reminds me that to get the highest resolution gravity map and best constraints on interior structure (does it have a core, how large . . . ?) is also improved significantly by getting as many orbits as possible. of course both are improved by going as low as possible, but we are constrained.
the blogs by Marc Rayman on the Dawn website are excellent for describing the Ceres mapping mission and why things are done as they are. google should get u there. excellent posts throughout 2014. p -------------------- Dr. Paul Schenk, Lunar and Planetary Institute, Houston TX
http://stereomoons.blogspot.com; http://www.youtube.com/galsat400; http://www.lpi.usra.edu/science/schenk/ |
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