Voyager camera pointing information |
Voyager camera pointing information |
Jul 29 2016, 09:32 PM
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#1
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Junior Member Group: Members Posts: 54 Joined: 7-July 16 From: Austin, Texas Member No.: 7991 |
Sorry if this has been discussed anywhere but I can't seem to find much information about it - why is it that Voyager's pointing is so haphazard, as in this video of all the RAW Jupiter images - https://www.youtube.com/watch?v=bf5QJ8iFxUs?
I came across this link which says that pointing information for the images exists - http://pds-rings.seti.org/voyager/ck.html, but have also read on this forum that it's not very accurate. Would the information be useful in automatically aligning composite images and mosaics, or is it too coarse? Would it at least be useful in getting general alignments that could be refined by hand? And does anyone know why the cameras could not be pointed more accurately, or why accurate information could not be returned with the images? I assume it was some technical limitation, but just curious what it might be. |
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Aug 3 2016, 11:51 PM
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#2
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
you have read through my post
"Voyager Images and Isis3, applications and methods" http://www.unmannedspaceflight.com/index.php?showtopic=8198 use your preferred way of handling the truncated lines adding a grid and then measuring the offset .You can then offset the non grided image by the x & y amount , this works well . For non gas giants ,a control network can be used BUT this is easier IF the images are already close to accurate. QUOTE I came across this link which says that pointing information for the images exists - http://pds-rings.seti.org/voyager/ck.html, but have also read on this forum that it's not very accurate. Would the information be useful in automatically aligning composite images and mosaics, or is it too coarse? Would it at least be useful in getting general alignments that could be refined by hand? "vger" predates pds and the isis3 ( and 1 and 2 ) tools and parts of vicar these are reconstructed kernels built from reworked archive tapes and log books the fact that they are THIS close is a feat in of it's self so for 100% automated ????? probably not |
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Aug 4 2016, 03:12 AM
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#3
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Junior Member Group: Members Posts: 54 Joined: 7-July 16 From: Austin, Texas Member No.: 7991 |
Thanks for the link, I haven't tried ISIS yet - would like to someday though.
At the moment the goal is to make fairly rough movies, so motion of the target between images isn't accounted for, nor geometric distortion, but they look okay(ish) for the task. Here's the Voyager 1 Jupiter rotation movie in color, still kind of glitchy (v0.41) - http://imgur.com/MgNRzyE. Maybe someday a later version could get into using ISIS to make more accurate versions, but that's kind of over the horizon at the moment. But yeah, whatever can't be automated will have to be done by hand - will try to reduce that as much as possible though. |
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