Juno Perijove 56, November 22, 2023 |
Juno Perijove 56, November 22, 2023 |
Nov 29 2023, 09:24 PM
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#1
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
Some of the images have been posted on missionjuno.
You will immediately notice that there is something weird about them. Yes, we know about this, and I'll say more about it when I can. In the meantime, anything people can do to process them would be appreciated. I've had some success using https://github.com/chunglabmit/pystripe -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Dec 2 2023, 02:39 AM
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Some of my early thoughts about the striping artefacts below. Presumably not too much new insight thus far.
The superposed signal appears to be mostly low-frequency along x. There should be ways to filter out most of it. Here a very ad-hoc example of a cropped draft of JNCE_2023326_56C00140_V01 without and with some filtering along x: It essentially removes wavelengths of more than ~100 pixels along x, kind of high-passing along x. I'm trying to learn more about the spectrum of the addiional signal. That may help to find a suitable filter. Some spectral features seem to be fairly constant after a first informal glance. A more formal analysis is work in progress. We'll see whether the properties of the stripes can be nailed down a little better. A high dark level may truncate the signal numerically during companding. That may limit the recovery of the original data. Combining/stacking multiple images over all three color channels may improve S/N. That's roughly the ideas I'm going to persue. |
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