Dawn approaches Ceres, From opnav images to first orbit |
Dawn approaches Ceres, From opnav images to first orbit |
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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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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 4252 Joined: 17-January 05 Member No.: 152 ![]() |
Well, 6x1.3 = 7.8, which is close to 8. But if you want to recover the original-resolution images as best as possible, you should subsample the 6x image by 1/6th rather than the 6x1.3 image by 1/7.8 or 1/8. With a good choice of subsampling algorithm and choosing the origin properly with respect to the 6x6 = 36 possibilities, you should be able to get a reasonable result.
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