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Unmanned Spaceflight.com _ Juno _ Juno Perijove 21

Posted by: Brian Swift Jul 23 2019, 11:28 PM

Collage of PJ21 initial downlink images. Full rez 13902x9218 8-bit JPG available on flickr. 16-bit PNG uploaded to missionjuno.
https://flic.kr/p/2gFqrPWhttps://flic.kr/p/2gFqrPW

Posted by: Brian Swift Jul 23 2019, 11:41 PM

Mike, is there an explanation for the occasional missing frame seen at the beginning of some of the "wide" (~180 spin) raw images?

Posted by: Kevin Gill Jul 24 2019, 01:56 AM

A couple of angry looking storms visible

https://flic.kr/p/2gFmvSi
https://flic.kr/p/2gFmvSi


https://flic.kr/p/2gFn2Tk
https://flic.kr/p/2gFn2Tk


https://flic.kr/p/2gFqUG4
https://flic.kr/p/2gFqUG4

Posted by: mcaplinger Jul 24 2019, 03:58 AM

QUOTE (Brian Swift @ Jul 23 2019, 03:41 PM) *
Mike, is there an explanation for the occasional missing frame seen at the beginning of some of the "wide" (~180 spin) raw images?

Looks to me like our ground data system didn't command quite enough frames to catch the top limb of the planet in the red channel -- maybe it incorrectly assumes there can't be more than 40 frames in a nadir-centered image, which due to roundoff is not quite true. I'll take a look at it.

Posted by: Bjorn Jonsson Jul 24 2019, 11:34 PM

This is a preliminary map-projected version of image PJ21_26. The Great Red Spot in on the limb in the original raw image, therefore a part of it is 'missing' here and Jupiter's sky is visible with huge vertical exaggeration. Approximately true color/contrast.


Posted by: mcaplinger Jul 25 2019, 12:58 AM

Be patient, the GRS views get better. We're still having some data dropout problems, I'd expect another push of images tomorrow.

Posted by: mcaplinger Jul 25 2019, 08:26 PM

Nearly all of the PJ21 images are on missionjuno now -- one image is still partial AFAIK.

Posted by: Kevin Gill Jul 25 2019, 10:01 PM

Ah, Juno got nice view of the Great Red Spot. Some preliminary processing of it:

https://flic.kr/p/2gGMYFP
https://flic.kr/p/2gGMYFP


https://flic.kr/p/2gGP7BM
https://flic.kr/p/2gGP7BM

Posted by: Kevin Gill Jul 26 2019, 02:41 AM

A couple composite views:

JNCE_2019202_21C00010_V01
JNCE_2019202_21C00012_V01
JNCE_2019202_21C00013_V01
JNCE_2019202_21C00014_V01
JNCE_2019202_21C00015_V01:

https://flic.kr/p/2gFz8XA
https://flic.kr/p/2gFz8XA


JNCE_2019202_21C00015_V01
JNCE_2019202_21C00017_V01:

https://flic.kr/p/2gFRxnV
https://flic.kr/p/2gFRxnV


JNCE_2019202_21C00014_V01
JNCE_2019202_21C00015_V01
JNCE_2019202_21C00017_V01
JNCE_2019202_21C00018_V01
JNCE_2019202_21C00019_V01:

https://flic.kr/p/2gGBFgY
https://flic.kr/p/2gGBFgY


JNCE_2019202_21C00032_V01
JNCE_2019202_21C00036_V01
JNCE_2019202_21C00039_V01
JNCE_2019202_21C00040_V01
JNCE_2019202_21C00041_V01
JNCE_2019202_21C00042_V01
JNCE_2019202_21C00043_V01
JNCE_2019202_21C00044_V01
JNCE_2019202_21C00045_V01:

https://flic.kr/p/2gGUePh
https://flic.kr/p/2gGUePh

Posted by: Sean Jul 26 2019, 02:23 PM

PJ21_16 [GE/SD]
https://flic.kr/p/2gHcz8x




Posted by: mcaplinger Jul 26 2019, 05:57 PM

QUOTE (Kevin Gill @ Jul 25 2019, 02:01 PM) *
Ah, Juno got nice view of the Great Red Spot. Some preliminary processing of it...

Beautiful work as always, Kevin. Interesting to compare this to what Damien Peach saw back in June -- http://damianpeach.com/jup19/2019-06-03-0500_3-RGBdp.jpg -- doesn't look all that different except that scalloped stuff to the east seems to have smoothed out.

Posted by: Kevin Gill Jul 26 2019, 07:29 PM

QUOTE (mcaplinger @ Jul 26 2019, 01:57 PM) *
Beautiful work as always, Kevin. Interesting to compare this to what Damien Peach saw back in June -- http://damianpeach.com/jup19/2019-06-03-0500_3-RGBdp.jpg -- doesn't look all that different except that scalloped stuff to the east seems to have smoothed out.



Well, it's interesting... In not-very-scientific measurements from Perijoves 7, 12, 18, & 21, there appears to be a measurable longitudinal shrinking of the GRS:


Perijove 7: 16,094 km



Perijove 12: 15,898 km



Perijove 18: 15,627 km



Perijove 21: 15,149 km




With a linear decline in width up to Perijove 18, then a sharper decline to Perijove 21 which matches the timing of the detachments observed by Damien Peach.

Posted by: Bjorn Jonsson Jul 26 2019, 11:27 PM

QUOTE (mcaplinger @ Jul 25 2019, 08:26 PM) *
Nearly all of the PJ21 images are on missionjuno now -- one image is still partial AFAIK.

I noticed that there is no image number 33 at the MissionJuno website. Is that the one that is still partial? If there is an image number 33 that's actually probably a very interesting image that should show areas north and/or west of the GRS very well.

QUOTE (Kevin Gill @ Jul 26 2019, 07:29 PM) *
With a linear decline in width up to Perijove 18, then a sharper decline to Perijove 21 which matches the timing of the detachments observed by Damien Peach.

Something comparable has also been measured from ground based images, see http://alpo-j.asahikawa-med.ac.jp/kk19/j190624r.htm and http://pianeti.uai.it/index.php/Jupiter:_2019_Animated_gif

Posted by: mcaplinger Jul 27 2019, 04:13 PM

QUOTE (Bjorn Jonsson @ Jul 26 2019, 03:27 PM) *
I noticed that there is no image number 33 at the MissionJuno website. Is that the one that is still partial? If there is an image number 33 that's actually probably a very interesting image that should show areas north and/or west of the GRS very well.

Correct. Image 33 taken 04:32:27. The dropout is small but goes right across the GRS in one channel (of course.) I'd expect it to be pushed by mid-week next week one way or another.

Posted by: mcaplinger Jul 29 2019, 08:09 PM

QUOTE (mcaplinger @ Jul 27 2019, 08:13 AM) *
I'd expect it to be pushed by mid-week next week one way or another.

The last image from PJ21 is on missionjuno now.

Posted by: Bjorn Jonsson Jul 29 2019, 09:18 PM

QUOTE (mcaplinger @ Jul 29 2019, 08:09 PM) *
The last image from PJ21 is on missionjuno now.

Awesome - thanks. This image is even more interesting/better than I was expecting it to be.

Posted by: Kevin Gill Jul 30 2019, 04:59 PM

A quick GRS and Areas West map view using the '33 data:

Uses: JNCE_2019202_21C00033_V01, JNCE_2019202_21C00036_V01, JNCE_2019202_21C00039_V01

https://flic.kr/p/2gKHPhD
https://flic.kr/p/2gKHPhD

Posted by: Kevin Gill Jul 30 2019, 09:02 PM

And a fish-eye marble view of areas west of the GRS.

Uses:
JNCE_2019202_21C00032_V01
JNCE_2019202_21C00033_V01
JNCE_2019202_21C00036_V01
JNCE_2019202_21C00039_V01
JNCE_2019202_21C00040_V01
JNCE_2019202_21C00041_V01
JNCE_2019202_21C00042_V01


https://flic.kr/p/2gLkyck
https://flic.kr/p/2gLkyck


Posted by: Brian Swift Aug 6 2019, 10:34 PM

AR Quick Look globes for PJ21 (viewable in Safari on devices running iOS 12 or later) at:
http://www.mandelbits.com/arworlds.html

 

Posted by: Explorer1 Aug 8 2019, 03:32 PM

Just for comparison, a lovely Hubble view (taken June 27) has been released:

https://spacetelescope.org/images/heic1914a/

Posted by: Bjorn Jonsson Aug 13 2019, 10:49 PM

I posted a PJ21 Great Red Spot (GRS) mosaic in http://www.unmannedspaceflight.com/index.php?showtopic=8373&view=findpost&p=245461 which also contains GRS mosaics from earlier perijoves. A bigger version of the mosaic covering a bigger area can be found at the https://www.missionjuno.swri.edu/junocam/processing?id=7282.

Below are enhanced images showing specific features from the mosaic. The first one shows the convective storms west and northwest of the GRS. It has been processed to reveal subtle features within the very bright convective feature northwest of the GRS. The second one shows the STB spectre.



Posted by: Brian Swift Aug 19 2019, 05:55 AM

Jupiter flyover Time-lapse | 4K, 60FPS
https://youtu.be/798Nju8-4Tw


Posted by: Kevin Gill Oct 17 2019, 11:18 PM

PJ21 Flyover video. Certainly not perfect. Motion tracks spice data, but camera rotation does not.

https://flic.kr/p/2hwkJfu
https://flic.kr/p/2hwkJfu

And on YouTube @ 4K: https://www.youtube.com/watch?v=KhG5nXJLW4M

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