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Juno Perijove 23, November 03, 2019
Brian Swift
post Nov 8 2019, 10:34 PM
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PJ23_28
I'd wondered if sometime JunoCam would capture an annular footprint image.
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Bjorn Jonsson
post Nov 10 2019, 04:25 PM
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Image PJ23_23, areas farther left/right than in the 'central' PJ23_23 image I posted earlier. Approximately true color/contrast and enhanced versions:

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Bjorn Jonsson
post Nov 20 2019, 11:50 PM
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Image PJ23_18, approximately true color/contrast:

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And with enhanced contrast/colors:

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These images are interesting because of a very long haze band among other things. The band appears to cast a brownish shadow on the cloud deck below in the enhanced images. Below is an image where a stronger contrast stretch has been applied. The shadow is indicated with arrows; the haze band itself appears slightly brighter and bluer/whiter than the surrounding areas. Latitudes are planetographic and longitudes in system 3.

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By the way I have noticed that for the PJ23 images I have needed to add a much smaller value to START_TIME than has been typical. I haven't processed a lot so far though (I have been concentrating on software development for increased automation and bigger accuracy when doing limb fits). It's possible that I've messed up which SPICE files I'm using although at first glance this didn't seem to be the case. The resulting images look perfectly normal despite this, i.e. good R/G/B alignment and nothing strange at the limb in map-projected images.
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mcaplinger
post Nov 21 2019, 01:10 AM
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QUOTE (Bjorn Jonsson @ Nov 20 2019, 03:50 PM) *
By the way I have noticed that for the PJ23 images I have needed to add a much smaller value to START_TIME than has been typical.

One thing I've found is that if possible you should wait for the reconstructed SPK files before trying to process, it has made a big difference for some orbits.


--------------------
Disclaimer: This post is based on public information only. Any opinions are my own.
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Bjorn Jonsson
post Nov 25 2019, 09:18 PM
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This is image PJ23_20 in approximately true color/contrast and enhanced versions:

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The last image pair looks especially interesting. The enhanced image reveals pastel colors above and slightly left of center. The visual impression is that they seem to be associated with very bright clouds. These colors are a real feature and not a processing artifact. They are also visible in the true color/contrast version but look far more subdued there. The colors also appear in versions of image PJ23_20 processed by others, for example in Gerald's images. Hints of pastel colors have also been visible in some earlier JunoCam images (e.g. image PJ9_81) but they are particularly strong in this image.

For cosmetic purposes, a small gap on Jupiter's limb near the bottom in the last image pair was filled using data from image PJ23_21.
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Brian Swift
post Dec 3 2019, 09:11 PM
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PJ23 flyover on YouTube https://youtu.be/e2zk4m2hvys
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Brian Swift
post Today, 07:08 PM
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QUOTE (Bjorn Jonsson @ Nov 20 2019, 03:50 PM) *
By the way I have noticed that for the PJ23 images I have needed to add a much smaller value to START_TIME than has been typical.

Mean and Stddev of my START_TIME adjustments for PJ23 are similar to other perijoves. (Using predict SPK since reconstructed isn't available yet).
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