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JunoCam "Marble Movie", July 10 through October 14
mcaplinger
post Sep 30 2016, 06:46 PM
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QUOTE (xflare @ Sep 30 2016, 01:44 AM) *
I haven't been able to find the Dates and Times of the upcoming Perijove close approaches, does anyone have them?

These were accurate at one time, I haven't checked them lately but they should be pretty close. Times in UT, obviously.
CODE
orb[  0] = "05-JUL-2016 02:47:38"
orb[  1] = "27-AUG-2016 12:51:20"
orb[  2] = "19-OCT-2016 18:11:07"
orb[  3] = "02-NOV-2016 17:52:29"
orb[  4] = "16-NOV-2016 16:54:46"
orb[  5] = "30-NOV-2016 15:52:21"
orb[  6] = "14-DEC-2016 14:49:58"
orb[  7] = "28-DEC-2016 13:47:35"
orb[  8] = "11-JAN-2017 13:59:37"
orb[  9] = "25-JAN-2017 12:57:12"
orb[ 10] = "08-FEB-2017 11:54:47"
orb[ 11] = "22-FEB-2017 10:52:21"
orb[ 12] = "08-MAR-2017 09:12:44"
orb[ 13] = "22-MAR-2017 08:10:19"
orb[ 14] = "05-APR-2017 07:07:53"
orb[ 15] = "19-APR-2017 06:05:27"
orb[ 16] = "03-MAY-2017 06:17:26"
orb[ 17] = "17-MAY-2017 05:14:57"
orb[ 18] = "31-MAY-2017 04:12:29"
orb[ 19] = "14-JUN-2017 03:10:03"
orb[ 20] = "28-JUN-2017 03:40:40"
orb[ 21] = "12-JUL-2017 02:38:12"
orb[ 22] = "26-JUL-2017 01:35:46"
orb[ 23] = "09-AUG-2017 00:33:19"
orb[ 24] = "23-AUG-2017 00:08:07"
orb[ 25] = "05-SEP-2017 23:05:44"
orb[ 26] = "19-SEP-2017 22:03:21"
orb[ 27] = "03-OCT-2017 21:00:55"
orb[ 28] = "17-OCT-2017 20:35:43"
orb[ 29] = "31-OCT-2017 19:33:14"
orb[ 30] = "14-NOV-2017 18:30:45"
orb[ 31] = "28-NOV-2017 17:28:16"
orb[ 32] = "12-DEC-2017 17:02:53"
orb[ 33] = "26-DEC-2017 16:00:20"
orb[ 34] = "09-JAN-2018 14:57:50"
orb[ 35] = "23-JAN-2018 13:55:18"
orb[ 36] = "06-FEB-2018 12:52:47"
orb[ 37] = "20-FEB-2018 11:39:44"


--------------------
Disclaimer: This post is based on public information only. Any opinions are my own.
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Gerald
post Oct 6 2016, 05:29 PM
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The implementation of the (rigid) spheroid model seems to be roughly ok now. Some model parameters may need further refinement.
Here one of my according attempts (still with some additional manual registering) to cover Jupiter's north polar region seen from about the position of the first PJ1 image (close to above the north pole):
Attached Image
Attached Image

Attached Image
Attached Image

(credit: NASA / JPL / SwRI / MSSS / Gerald Eichstädt)
Three of the images are from "Marble Movie", one is PJ1.
I'm trying to cover the remaining quarter, too, but think I've still an unresolved issue for this latter part.
Since the same part of Jupiter looks different from different perspective, it's not always obvious where discrepancies come from.

Btw. The online version of the Daily Mail happened to combine two different identities to a plausible, but non-existent phantom, with others copy-pasting it. So I can continue working undisturbed thus far.
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Gerald
post Oct 7 2016, 08:24 PM
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JunoCam Marble Movie part 12, pre- and post-solar conjunction, level 1 stills, avi part 12, and avi parts 1-12.
Quality of my post-conjunction processing seems almost, but not quite perfect. I'll run a recalibration, if someone complains.
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Gerald
post Oct 8 2016, 04:03 PM
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One of the pre-PJ1 Marble Movie images reprojected (displayed in spherical coordinates, therefore the rounded square-like appearance) to about 21 minutes before closest approach, and enhanced:
Attached Image

Images like this might eventually provide context for the PJ1 images.
The image is an enhanced crop of a still of a preliminary animation. Resolution is 10 pixels/degree.
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Gerald
post Oct 11 2016, 01:59 AM
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Exploring the surface coverage of selected Marble Movie (near PJ1) and PJ1 images:
Attached Image

(cylindrical map with some longitude overlap)
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Gerald
post Oct 12 2016, 02:16 PM
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Context map for PJ1, southern hemisphere, composed of 20 map-projected Marble Movie images, enhanced:
Attached Image


Less processed version.

...working on northern hemisphere...
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mcaplinger
post Oct 12 2016, 03:30 PM
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QUOTE (Gerald @ Oct 12 2016, 06:16 AM) *
Context map for PJ1, southern hemisphere...

That's really nice. It would be more scientifically useful if you presented it in a standard cylindrical map projection (no duplication) and defined the coordinate system (central longitude, which longitude system, latitudes planetographic or planetocentric, etc.) And identifying which images were used would be helpful.


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Gerald
post Oct 12 2016, 05:55 PM
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Thanks! And thanks for guidance!
I'm trying to complete the full surface coverage before tomorrow in the evening. Then I'll likely be offline until Sunday evening. Might be, that finishing will last until after the weekend, but I'm open to additional requirements.
Scale is 10 pixels / degree in this rendition, longitude and latitude, equator in the y-center, latitude range [-90°;+90°].
Accuracy not yet known exactly, probably near 1°.
Some of your suggestions have already been on my list, just not yet completed. The underlying images for the southern hemisphere are the first 20 Marble Movie images after PJ1, but I'll likely provide all partial maps, too, for better reproducibility.
I'm aware of the GRL deadline.
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Gerald
post Oct 13 2016, 04:08 AM
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QUOTE (mcaplinger @ Oct 12 2016, 05:30 PM) *
And identifying which images were used would be helpful.

Zip file with individual maps with suggestive name infixes (42 MB), at least.
Coordinates should be approximately planetocentric (rendition observer sitting at Jupiter's center with a spherical coordinate system looking to a Jupiter-spheroid), co-rotating in a rigid way with some surface feature in the overlap between first and last map of the sequence. The attitude transformation between the frames (JunoCam and Jupiter) is inferred from a fixed instant of four SPICE trajectory dumps, hence from two vector pairs, each completed to a basis by the respective vector product. And there may be some rotation offset due to the chosen instant of rendition. The effect on the zero meridian is TBD.
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Gerald
post Oct 13 2016, 04:35 PM
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Preliminary full surface coverage around PJ1, derived from the 40 nextmost Marble Movie RGB images (20 before and 20 after PJ1), reduced to 0.2x0.2 lon/lat planetocentric degree squares:
Attached Image


Full version with 0.1x0.1 degree² pixels.
Less processed version.

Download link to 87 MB zip file with the partial maps.
Some of the partial maps may be higher resolved then the corresponding merged map due to overlap with lower-resolved image.
As of now, I can't rule out some shear or displacement/mis-alignment.

I'll hopefully be able to provide a somewhat refined and appropriately cropped 360°x180°-version early next week.
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Gerald
post Oct 15 2016, 06:52 AM
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Regarding the changes of the planning, it's maybe better to provide another intermediate version of the global map around PJ1:
Attached Image

Some mis-alignments are reduced. You'll get an idea of the inaccuracies of the previously posted map, but the version is still not perfect.

The map is post-processed by a 0-th de-lamberting (dividing by sqrt(cos(y))), and roughly squared.

Currently I've only a reduced communication bandwidth.
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Gerald
post Oct 18 2016, 08:13 PM
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Marble Movie, part 13, covers 2016-10-02 to 2016-10-08.
I've added revised level 1 stills of part12, since best-fit parameters changed a bit after solar conjunction.

Btw.: Tomorrow there will be a Juno press conference:
NASA’s Juno Team to Discuss Jupiter Mission Status, Latest Science Results
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Gerald
post Oct 20 2016, 01:59 PM
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Hi Mike, could you please pre-release the latest available raw Marble Movie images before PJ2, asap, particularly the CH4? Metadata aren't essential. There appear to take place significant changes on Jupiter right now.
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Gerald
post Oct 21 2016, 04:21 AM
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Thanks a lot!
Here the zipped level1-stills of Marble Movie, part 14, until power-off on October 14, RGB and methane band.
I see the GRS in the methane images, but no obvious hint towards the recently discovered bright IR features.
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Gerald
post Oct 21 2016, 09:28 AM
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I barely dare to ask, whether JunoCam has been powered on between October 15 and 19, and whether it has taken images during this time, after the decision to postpone the PRM, and before the PJ2 safe mode event. But I'm almost sure, that it won't take a day, before I'll be asked the very same question.
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