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Posted by: Kevin Gill Apr 19 2021, 10:41 PM

The first batch of PJ33 images are down!

Tried running them through my pipeline but it blew up during the ISIS3 cam2map step with the error "**PROGRAMMER ERROR** Angle cannot be a non-Null special pixel." First time I've seen that...

Posted by: mcaplinger Apr 19 2021, 11:19 PM

Just to warn everybody -- owing to various DSN factors, it may be a while before the rest of PJ33 shows up.

Posted by: Brian Swift Apr 20 2021, 04:40 PM

While we're waiting... Here's my processing of what has been downlinked

Full resolution version available at https://www.missionjuno.swri.edu/junocam/processing?id=10362

Posted by: Kevin Gill Apr 20 2021, 05:06 PM

Beautiful! I want to get at that storm in PJ33-27 & 28 sooo bad! Did you have any spice errors or other issues with this perijove, or is it just me?

Posted by: Brian Swift Apr 20 2021, 06:08 PM

I didn't notice any spice problems on my side. The special pixel is just wants to torment you.

Posted by: fredk Apr 21 2021, 06:24 PM

Thanks a lot, Brian - these mosaics make great summaries of the encounters.

Posted by: Kevin Gill Apr 22 2021, 06:22 PM

Mike, I was wondering if you could check the image times and spacecraft clock values reported in the image metadata. My processing doesn't work (camera can't find Jupiter) if I use the values as reported, but if I shift them to ~10 hours earlier, it's closer. I'm not sure of the exact time difference or if the error is in the metadata JSON or in the spice kernels.

Thanks!

Turns out to be an issue with the spice kernels that are off by the ~10 hours. Imagery times appear to be correct.

Posted by: mcaplinger Apr 22 2021, 08:43 PM

Image 16 is SCLK 671800194:54 or 2021 APR 15 23:03:54.55 and the JSON on missionjuno says "IMAGE_TIME": "2021-04-15T23:03:54.546" so that all seems right to me.

We used juno_sc_rec_210414_210416_v01.bc and spk_ref_210111_251021_210111.bsp to do our processing, I believe, and it certainly found Jupiter OK.

Posted by: mcaplinger Apr 23 2021, 01:11 AM

Be aware that some of the files on the NAIF website produced before the EM was official will have the old pre-EM orbit, which I expect was the source of your problems. But I'm not sure which are good and which are bad or how this interacts with the ISIS kernel updating process, if that's what you're using.

Posted by: Bjorn Jonsson Apr 23 2021, 03:13 AM

To prepare for the extended mission and maintain the orbit, PJ33 was delayed by exactly one jovian day compared to earlier plans. See https://britastro.org/node/25896

Posted by: Brian Swift Apr 23 2021, 05:21 AM

Thanks Fred. And the large versions on Mission Juno allow you to explore the full resolution of all the color images in a perijove.

Posted by: volcanopele Apr 23 2021, 06:04 AM

I don't do a lot of JunoCAM processing, but for Juno visualizations, I maintain a metakernel that I try to update about once a week. I use the following kernels for the spacecraft position:

spk_ref_210111_251021_210111.bsp
juno_pred_orbit.bsp
juno_rec_orbit.bsp

The first is the reference orbit for the extended mission while the other two are regularly updated files covering the predicted orbit through July 20 (at present) and the recorded orbit (through March 21). The latter two files are regularly updated and I just keep those files up-to-date.

Posted by: mcaplinger Apr 23 2021, 06:27 AM

One problem is that this file (which we also use, see above) isn't on the NAIF web site at present, we've asked that it be put back up. The older ref files are, I think, wrong (as one would expect.)

Using the rec or later pre files should be safe, I hope.

Posted by: mcaplinger Apr 23 2021, 08:54 PM

I think all of the PJ33 images are on missionjuno now.

Posted by: volcanopele Apr 23 2021, 11:35 PM

Thanks for the heads up!

Here's the Io image from 33C00045:

No plumes apparent, though Chalybes would be on the bright limb at upper left. Chalybes had been cooling down in late 2019/early 2020 so it may not have an active plume at present. No known plume sources on the terminator, so the lack of a plume is not entirely surprising...

I will leave it to others to tease out and process the grouping of three Galilean moons in that image. Europa is the smaller half-moon to the left of Io and Callisto is even smaller, and darker, between the two and maybe a half a framelet down.

Posted by: Brian Swift Apr 24 2021, 06:59 AM

No Departure Movie?

Posted by: Kevin Gill Apr 24 2021, 08:39 PM

So, per suggestion from Candy Hansen, I switched to using the predicted kernel. And as she predicted, it worked!


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


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


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


https://flic.kr/p/2kUJa7t
https://flic.kr/p/2kUJa7t

Posted by: Sean Apr 24 2021, 11:59 PM

Beautiful results Kevin! Wow.

Posted by: Brian Swift Apr 26 2021, 07:09 AM

Io, Europa, Callisto

Posted by: Kevin Gill Apr 28 2021, 05:10 PM

A couple more detail crops from Perijove 33:


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


https://flic.kr/p/2kUYz3g
https://flic.kr/p/2kUYz3g


https://flic.kr/p/2kVe2xo
https://flic.kr/p/2kVe2xo


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


https://flic.kr/p/2kVmr77
https://flic.kr/p/2kVmr77

Posted by: Brian Swift May 8 2021, 06:24 AM

Departure movie and lightning search up now. Not sure when they were posted.

Posted by: volcanopele May 25 2021, 07:50 PM

The reference kernel spk_ref_210111_251021_210111.bsp is back on the NAIF site.

Posted by: Bjorn Jonsson Jun 6 2021, 09:50 PM

A map-projected mosaic of images pj33_48 and 49, approximately true color/contrast and enhanced versions:

Oval BA is visible above center at left. It is obvious (as had also been seen earlier) that it has regained some of its color.