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Juno perijove 5, March 27, 2017
Gerald
post Mar 29 2017, 01:56 PM
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Polar projection of PJ-05 image #111, and detail, enhanced in different ways:
Attached Image

(NASA / JPL / SwRI / MSSS / Gerald Eichstädt)

Thanks to the Juno-Ops team for your outstanding work! Despite the tight memory constraints of PJ05, we've got a sequence of images of high quality, as far as I can already say about the images I've preliminarily processed thus far.
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PhilipTerryGraha...
post Mar 30 2017, 12:02 AM
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Looks like Jupiter is happy to see Juno again wink.gif

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Roman Tkachenko
post Mar 30 2017, 12:22 AM
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Jupiter, Io and Europa.


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mcaplinger
post Mar 30 2017, 02:20 AM
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Lightly-processed quicklook version of image pj5-110. I'm sure others will do a better job.

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Roman Tkachenko
post Mar 31 2017, 04:23 PM
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#110


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Decepticon
post Mar 31 2017, 08:42 PM
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Roman that is beautiful!
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Gerald
post Mar 31 2017, 11:45 PM
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Is it possible to discern any rotation in these large storms within the five and a half minutes between images #109 and #110?
My best candidate is the large white (anticyclonic) oval A6:
Attached Image

(crop of cylindrical planetocentric projection with 60 pixels / deg, de-Lambertianed, and further enhanced, north to the right)
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Decepticon
post Apr 1 2017, 02:23 AM
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Can Juno image lightning on the dark side?
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Gerald
post Apr 1 2017, 04:44 AM
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Yes, but there are also energetic particle events and camera artifacts. So, we need to look twice, before making conclusions.
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Gerald
post Apr 2 2017, 07:45 AM
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Spacecraft changing spin axis (and observation mode) during PJ05 approach:
Attached Image

Colors approximately radiometric, then square-root encoded. South is up. Note the Great Red Spot, and a moon shadow.

For this sequence, I've calibrated my simplfied geometrical camera model for each image separately during an overnight calibration run.
With this kind of sequences covering spacecraft attitude changes, I'm hoping and expecting to be able to further narrow down the actual geometrical camera properties, among other approaches.
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Gerald
post Apr 2 2017, 08:51 AM
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For completeness, here the statistics resulting from the calibration run:
Attached Image

There are peaks and discontinuities near the change of the s/c spin axis.

But at least the camera's optical axis shouldn't change during these maneuvers, with the x-position near 812. The inconsistencies indicate residual flaws in the model, and help to uncover them.
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Roman Tkachenko
post Apr 2 2017, 06:07 PM
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#109


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scalbers
post Apr 2 2017, 07:33 PM
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That has some super detail in it, including what look like convective cloud elements. Do we know what the pixel resolution is? Considering the context, these convective clouds on the right are in a zone, with overall low altitude clouds, so that we see more into a water rich level. The redder clouds on the left are in a higher belt. It seems the bluer nature of the zone would be consistent with looking through some overlying clear air with attendant Rayleigh scattering.


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mcaplinger
post Apr 2 2017, 08:21 PM
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QUOTE (scalbers @ Apr 2 2017, 11:33 AM) *
Do we know what the pixel resolution is?

Altitude from the metadata is 12744 km, so resolution is 673e-6*12744 = 8.6 km/pix at nadir.


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scalbers
post Apr 2 2017, 09:48 PM
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Thanks - we can see the sizes of the convective clouds are similar to thunderstorms on Earth.


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