Juno perijove 5, March 27, 2017 |
Juno perijove 5, March 27, 2017 |
Mar 29 2017, 01:56 PM
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#16
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Polar projection of PJ-05 image #111, and detail, enhanced in different ways:
(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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Mar 30 2017, 12:02 AM
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#17
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Junior Member Group: Members Posts: 71 Joined: 12-December 16 Member No.: 8089 |
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Mar 30 2017, 12:22 AM
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#18
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Junior Member Group: Members Posts: 80 Joined: 18-October 15 From: Russia Member No.: 7822 |
Jupiter, Io and Europa.
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Mar 30 2017, 02:20 AM
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#19
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Mar 31 2017, 04:23 PM
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#20
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Junior Member Group: Members Posts: 80 Joined: 18-October 15 From: Russia Member No.: 7822 |
#110
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Mar 31 2017, 08:42 PM
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#21
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
Roman that is beautiful!
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Mar 31 2017, 11:45 PM
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#22
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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: (crop of cylindrical planetocentric projection with 60 pixels / deg, de-Lambertianed, and further enhanced, north to the right) |
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Apr 1 2017, 02:23 AM
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#23
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
Can Juno image lightning on the dark side?
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Apr 1 2017, 04:44 AM
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#24
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Yes, but there are also energetic particle events and camera artifacts. So, we need to look twice, before making conclusions.
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Apr 2 2017, 07:45 AM
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#25
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Spacecraft changing spin axis (and observation mode) during PJ05 approach:
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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Apr 2 2017, 08:51 AM
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#26
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
For completeness, here the statistics resulting from the calibration run:
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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Apr 2 2017, 06:07 PM
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#27
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Junior Member Group: Members Posts: 80 Joined: 18-October 15 From: Russia Member No.: 7822 |
#109
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Apr 2 2017, 07:33 PM
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#28
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
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.
-------------------- Steve [ my home page and planetary maps page ]
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Apr 2 2017, 08:21 PM
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#29
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
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. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Apr 2 2017, 09:48 PM
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#30
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Thanks - we can see the sizes of the convective clouds are similar to thunderstorms on Earth.
-------------------- Steve [ my home page and planetary maps page ]
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