Juno Perijove 57, December 30, 2023 Options

[Kevin Gill]

Another go using PJ57-23 with decorrelated colors and darkness boosting. I'm so happy the camera performed as well as it did and am loving the results that everyone is coming up with :-)


Io - PJ57-23 - Decorrelated Colors

Cylindrical Map:

[Nahúm]

There's some detail around Loki in the color that implies changes, too, although to be absolutely certain we'd have to check against differences in filters.

Of course, mine was a quick comparison and it clearly needs a thorough alignment and analysis but both images were compared using the blue bands, so there might be some changes after all!

[john_s]

The color around Loki is certainly fascinating. These are, I think, the highest resolution color images of Loki ever obtained (the nearest competition being the Voyager 1 approach 4-frame color mosaic). Same goes for the terrain further north, of course.

John

[Brian Swift]

Kicked off the processing pipeline this morning, expecting to be greeted by PJ56 quality images that were going to require a lot of TLC, and gasped when this came up...



A fine ChristMSSS present for us all.

[Brian Swift]

And Exaggerated Color/Contrast version

[StargazeInWonder]

There are at least three (apparent) calderas in the imagery that show a diffuse, reddish coloration that trails off to the west (from this view, clockwise). Is this…

• Evidence of a Coriolis effect on plumes?
• Evidence of something of a faint exospheric wind, or something to do with the jovian EM environment?
• Purely coincidence? (n=3, not much to write home about… and perhaps there are also contrary cases to be pointed out)

[scalbers]

Here are a some 4K maps using one image from volcanopele and one from Kevin Gill, first before:

https://stevealbers.net/albers/sos/jupiter/...b_cyl_in_4k.png

now with the new images added:

https://stevealbers.net/albers/sos/jupiter/...cyl_2023_4k.png

I wonder if the changes at Loki represent a switch in the location of active plumes or simply deposits? Happy New Year to you all!

[volcanopele]

Preliminary versions of maps. No photometric correction, and I won't want to average the final product, but the Jupiter shine product is probably final:

[scalbers]

A blinking animation between the second map I posted above with Jason's nighttime map (some filtering applied):

https://stevealbers.net/albers/sos/jupiter/..._night_roll.png

[Antdoghalo]

The Jupitershine area really improves coverage on almost the entire area of that large northern hemisphere low resolution area. I really hope we can get further processing of that.

[StargazeInWonder]

The ideal processing of the Jupitershine areas might benefit from applying an asymmetrical filter to the pixels. Low signal to noise produces a speckling effect which is clearly an artifact and brings out some hot pixels that over-respond, and this makes the colors garish on a very small scale. Smoothing out the values in each filter to bring the hot ones down to the local median might improve this greatly.

[scalbers]

Fyi I had applied the noise reduction filter in GIMP with a setting of 12. This may be related to what StargazeinWonder mentions, and would work better if applied to the original image prior to reprojecting onto the cylindrical projection.

[vjkane]

Slightly off topic, but since this is the current active Juno forum: I understand that the Juno extended mission is expected to end by September 2025. Is this driven by a decision to dispose of the orbiter (presumably into Jupiter)? Or is this a current funding deadline with another extension possible?

[mcaplinger]

I understand that the Juno extended mission is expected to end by September 2025. Is this driven by a decision to dispose of the orbiter (presumably into Jupiter)? Or is this a current funding deadline with another extension possible?

I thought it was stated somewhere (OPAG?) that disposal was no longer required with the current orbit, so I suspect it's the latter. Depending on ongoing spacecraft health and funding availability, of course.

[volcanopele]

Fyi I had applied the noise reduction filter in GIMP with a setting of 12. This may be related to what StargazeinWonder mentions, and would work better if applied to the original image prior to reprojecting onto the cylindrical projection.

I'll look into some post-processing steps today. My first thought was running each mosaic through a median filter in ISIS prior to stacking.

EDIT: really not liking the results. The red filter, while noisy, has pretty good detail so I really don't want to smooth that. I suspect that using the noise filter in ISIS would help a lot, but I am not wanting to dive into yet another research topic today after spending all day yesterday trying to wrangle the geometry...