Juno perijove 6, May 19, 2017 Options

[toni]

Dettail image n 00122!
 

Image Credit: NASA / JPL / MSSS / Gerald Eichstädt / Toni Uddo

[Sean]

Here is another from Gerald's supersampled batch...

PJ06_118

[toni]

Wow Gerald! I wish I had more time to work on these. Thank you again for your amazing work!

Here is an 8k from your new supersampled batch...

Very well processed Sean !

[Sean]

Thanks Toni!

Here is another 8k from Gerald's supersampled batch...

PJ06_119


Detail...

[elakdawalla]

I would encourage all of you who are doing this great work to offer the full size images to the Planetary Society's image library. This forum could keep a half-scale or compressed version.

Phil

Let me echo this suggestion. Periodically I point this thread to my web editor (Tanya Harrison) and ask her to pick some favorites and post them. She has a good eye, but the curation is not very systematic. I'd be delighted if a volunteer or two from this community would be willing to help collect the metadata that's helpful when posting images -- what date was the image taken, on which flyby? What latitude are we looking at? That sort of information really adds to a caption and I just don't have time to collect it right now.

[Bjorn Jonsson]

I could fairly easily assemble the metadata into a single file with one row per image containing the interesting stuff from the metadata files. Each row would start with e.g. PJ6 followed by image number. This would make it very easy to locate the information for a particular image.

But to make this easy to use we should standardize the nomenclature here; I have noticed that Sean has started doing this in his posts here by putting e.g. PJ06_119 (perijove number/image number) at the top of his posts. This is a good thing since Sean's files are hosted at Flickr where there is no control over the filenames. I have been using comparable conventions for my image files (e.g. juno_pj6_112_19_ni_p.png).

And speaking of image files: Some experimentation has been done in attempts to increase the maximum upload size to something bigger than 1 MB but I'm not sure it worked (I'm a moderator here and the options I see for myself are probably different). It would be nice if someone posted here the maximum upload size he/she is seeing.

[Gerald]

Here are the concatenated JSON metadata files I'm currently working with:
 pj01_json_concatted.zip ( 82.53K ) Number of downloads: 293

 pj03_json_concatted.zip ( 40.66K ) Number of downloads: 212

 pj04_json_concatted.zip ( 68.08K ) Number of downloads: 195

 pj05_json_concatted.zip ( 75.2K ) Number of downloads: 228

 pj06_json_concatted.zip ( 76.86K ) Number of downloads: 245

The entries aren't necessarily strictly in the correct order. Usually, I'm using the search function of a text editor to look for the data. I've also csv excerpts for the data I'm requiring most frequently (file names with image stop time).
I didn't check (yet), whether version 02 files are different from version 01.
For perijive 02, there are no close flyby images, and at the moment, I'm not working with PJ02. But I could concat PJ02 metadata, if required.

For PJ06, the overview of my supersampled version might help to identify a PJ06 image, if there is available no other identifier. The image number is provided above each image, and also as part of the filename.

Note, that my rendering algorithm creates a correct and mirror-symmetric version of the image, and sometimes I happen to select the wrong one -- well, most easily after 2 a.m. in the early morning.

Btw.: My upload limit per post on UMSF currently is 1 MB.

[Sean]

Another from Gerald's supersampled set... repaired artifacts & processed

PJ06_127


Detail

[Bjorn Jonsson]

Btw.: My upload limit per post on UMSF currently is 1 MB.

Another attempt has been made to change the upload limit. Apparently it's rather complicated to change it but if the attempt was successful the limit should now be 3 MB. I'd be grateful if someone posted here the maximum upload size he/she is now seeing.

[Sean]

PJ06_126 work in progress

Testing 8192 x 4096 at 2.6mb... failed

Testing 6144 x 3072 at 2.79mb...


I wonder why the smaller filesize/larger image failed. Restriction on image dimensions?

Attachment limit is listed as 3.02mb

[Ian R]

This file (just my attempt to fiddle with one of Gerald's supersized frames) was 1.46 MB.

[Bjorn Jonsson]

Thanks for testing the upload size. The attempt to increase it to 3 MB was clearly a success. There are limitations to the image dimensions that I knew of - we may take a look at it later. These limitations are a smaller problem than the upload size was though (1 MB is *very* small these days).

[Sean]

PJ06_126 ( Gerald's )

8k PNG on Flickr...


4k JPG attachment...


the 8k JPG failed to attach.

[Gerald]

A first attempt of a global cylindrical planetocentric PJ06 map with 10 pixels per lon/lat degree, derived from 68 PJ06 images:

Enhanced version:


I've implemented a work-around for the RAM limitation.
Longitudes may be shifted, but seem to be self-consistent.

Two shadows of a moon went ino the map. On the left, the close-ups show up a little brighter than their context. Comparing these small patches with the GRS may provide an idea, how they compare in size with the GRS anticipated for close-ups during PJ07.

[Bjorn Jonsson]

I have noticed colored 'dots' in some of your images/maps that are there because the original framelets contain some dark 'spots' that resemble the reseau marks in e.g. the Voyager images. I'm not sure they are there in the most recent images but in case it is of interest I measured the position of these features in the framelets some time ago; my software automatically removes them before reprojecting the images to simple cylindrical projection. To do this I use a 9x9 median filter. The positions of the 'reseau-like' features are given below in case it's useful. There might be more but these are the most obvious ones. The columns are x, y, size. The coordinate system is for a BGR set of framelets that looks like this:



And the positions I measured:

CODE

35    84    6
33    187    5
215    46    3
593    45    3
711    39    4
1318    74    2
454    219    4
635    207    3
648    244    5
747    176    4
748    213    3
786    193    3
1070    246    3
1140    138    4
1259    141    4
135    259    3
135    353    3
359    364    4
533    263    4
537    266    3
756    305    3
920    364    3
1190    296    7
1350    265    3
1356    357    3
1200    64    3
1200    67    3
1200    70    7