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Juno Perijove 47
mcaplinger
post Dec 31 2022, 09:33 PM
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Disclaimer: This post is based on public information only. Any opinions are my own.
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Brian Swift
post Dec 31 2022, 10:50 PM
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QUOTE (mcaplinger @ Dec 31 2022, 01:33 PM) *

Did you fake-up a CK or manually align in Photoshop or other?
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Bjorn Jonsson
post Jan 4 2023, 11:21 PM
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I noticed that a reconstructed CK became available recently (probably less than 1 hour ago) - doing Control-F5 increasingly often now at a certain website smile.gif.
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mcaplinger
post Jan 5 2023, 03:14 AM
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A bunch of images (not all, but most) have been pushed out to missionjuno.


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Kevin Gill
post Jan 5 2023, 04:26 AM
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Quick look at a pair of images:

Jupiter - PJ47-79

Io - PJ47-57
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volcanopele
post Jan 5 2023, 04:49 AM
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Trying my best at the moment. I use Kevin's scripts to do the initial conversion from PNG to IMG/LBL and I'm running to libtiff issues. Currently seeing if I can get it to work on my Windows PC...

even on a fresh install on my PC I'm getting this just trying to import libtiff:

CODE
D:\Dropbox\Io\Juno\PJ47\JunoCAM>python3 test\test.py
Traceback (most recent call last):
  File "D:\Dropbox\Io\Juno\PJ47\JunoCAM\test\test.py", line 12, in <module>
    import libtiff
  File "C:\Users\volca\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\libtiff\__init__.py", line 20, in <module>
    from .libtiff_ctypes import libtiff, TIFF, TIFF3D
  File "C:\Users\volca\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\libtiff\libtiff_ctypes.py", line 46, in <module>
    raise ImportError('Failed to find TIFF library. Make sure that libtiff '
ImportError: Failed to find TIFF library. Make sure that libtiff is installed and its location is listed in PATH|LD_LIBRARY_PATH|..


Resolved this by just finding all the parts that call libtiff and removing those calls. All I need your scripts for is the conversion of PNGs to well, raws actually and creating label files for ISIS and it doesn't look like I need libtiff for those.


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volcanopele
post Jan 5 2023, 06:34 AM
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My rendition of 47C000057: PJ47 JunoCAM on the left, Galileo/Voyager basemap in the middle, PJ41 JIRAM on the right


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Brian Swift
post Jan 5 2023, 08:25 AM
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PJ47_58 adjusted to bring up Jupiter-shine illuminated night-side.
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Kevin Gill
post Jan 5 2023, 06:25 PM
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Yeah, stripping out libtiff is fine as it's only really used for testing and special product outputs. Libtiff can be a pain since conda and pip don't install enough of it to work properly, and installing libtiff-dev (Debian) is usually required. My new processing code gets around this and has better calibration routines, but doesn't yet produce reliable ISIS inputs (probably not a lot of work to implement that).

Here's a few more from PJ47:


Jupiter - PJ47-113


Jupiter - PJ47-113 - Detail


Jupiter - PJ47-93 - Detail
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vjkane
post Jan 5 2023, 07:05 PM
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QUOTE (volcanopele @ Jan 4 2023, 10:34 PM) *
My rendition of 47C000057: PJ47 JunoCAM on the left, Galileo/Voyager basemap in the middle, PJ41 JIRAM on the right


Attached Image

Very cool comparison. Thanks for posting this.


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volcanopele
post Jan 6 2023, 02:12 AM
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Finished up with the other images.


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The Gish Bar Times - A Blog all about Jupiter's Moon Io
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Bjorn Jonsson
post Jan 7 2023, 01:29 AM
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This is a montage of the PJ47 Io images together with computer generated images with a latitude/longitude grid to show the viewing geometry. The map used for the computer generated images is based on Voyager/Galileo images.

Attached Image


The images are enlarged by a factor of 5 relative to the original data. The color balance is preliminary but hopefully this is not very far from Io's real color.
Compared to the computer generated images it seems that there may be significant changes to Io's appearance but Jason knows more about that. It must be kept in mind though that Juno's camera/filters are significantly different from the Voyager and Galileo imaging systems. Also Io's color and contrast varies significantly as a function of phase angle.
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volcanopele
post Jan 7 2023, 04:54 PM
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Honestly, not seeing a lot of evidence for surface changes, but they would have to be pretty large scale to be seen. We are facing two issues. One: the phase angle is pretty high in these images and so you can’t just use a base map to compare to, you also need to look at New Horizons, Galileo, or even Voyager images with similar phase angles. Io’s surface materials have weird phase functions. For example, Colchis Regio is darker at higher phase angles.

Attached Image
Attached Image


I’m curious about the dark patches in the bright region north of Surt. Those don’t show up in Galileo or Voyager images but there also aren’t a lot of images of that region at that phase angle and at a useful emission angle. There is a dark spot east of Lei-Kung Fluctus but I am almost positive that’s a shadow. Dazhbog looks different compared to the base map, but that data is from Voyager and Dazhbog looks about the same as it did in the later Galileo images.


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The Gish Bar Times - A Blog all about Jupiter's Moon Io
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Brian Swift
post Jan 7 2023, 06:53 PM
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Mike, what was the difference in instrument operation for PJ47_03?
And is everything we are going to get for PJ47 up on missionjuno, meaning images 1,2,69,113-119 were not recoverable?
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Gerald
post Jan 8 2023, 02:39 PM
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I just wanted to provide a quick feedback about the close-up methane-band images.
Here are three reduced, roughly cleaned, and two of them heavily enhanced, crops thereof:
Attached Image

(#88, #92, #96)
Thanks to Candy and the ops team to include those images!

The methane-band images provide us with information about the heights of the cloud-tops.
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