Pluto Surface Observations 2: NH Post-Encounter Phase, 10 Oct 2015- 1 Feb 2016 |
Pluto Surface Observations 2: NH Post-Encounter Phase, 10 Oct 2015- 1 Feb 2016 |
Oct 13 2015, 09:05 PM
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#31
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This thread is for discussion of NH Pluto surface observations received after 10 Oct 2015.
-------------------- 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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Nov 7 2015, 11:55 AM
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#32
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Junior Member Group: Members Posts: 47 Joined: 21-June 15 Member No.: 7518 |
-------------------- Astronopithecus normandimensis nephophobis
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Nov 7 2015, 04:39 PM
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#33
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Senior Member Group: Members Posts: 4252 Joined: 17-January 05 Member No.: 152 |
Here is a better version of the night face of Pluto Thanks a lot, Fred. Could you explain what you did? In addition to registering on the crescent of Pluto, did you attempt to remove the obvious scattered light that's mainly around the centre of each frame? As you go through the 180-odd frames, the crescent shifts around but the scattered light stays pretty much at a fixed position in the frames. But the positions scanned by the crescent aren't very uniform, so if you just average all the frames after registering you'd expect to see brighter and darker patches on the dark side due to the averaging of the scattered light. In particular, the lower-right part of the dark side never really gets into the scattered light, so that might explain why the lower-right part of the dark side is dark on your image. What I'd do (if I had the time) would be to first produce a template for the scattered light (maybe by averaging some frames with the crescent removed), and then subtract that template (suitably normalized) from each frame, before registering on the crescent and doing the final average. "Suitably normalized" is the hard part here - but I wouldn't be surprized if there's an imageJ plugin to do that... |
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