Juno perijove 7: GRS images, July 11, 2017 Options

[Gerald]

GS_Brasil: "...other images look very strange to me...":

That's image #59, taken a mere 6276 km above Jupiter's 1 bar "surface". Here, Jupiter's surface curvature is contributing considerably to the perspective.
I'll try to prepare a fly-over for the GRS until early next week. This should make things more intuitive.

[jccwrt]

Departing the Great Red Spot. Still lots of "popcorn" convection in the South Tropical Zone, although I don't think that's a surprise at this point.

[Gerald]

PJ07, #062, and #064:

[PFK]

I take it BBC's report includes some of the brilliant efforts off here?
http://www.bbc.co.uk/news/science-environment-40594126

[Explorer1]

Just saw an article illustrated with that same image in the BBC report in today's edition of my local paper, the Victoria Times Colonist. You were credited Jason!

It's pretty satisfying to see ordinary people finally get credited rather than just acronyms like NASA, ESA, were on previous missions.

[jccwrt]

Wallpaper version of the 4 GRS images from the Perijove 7 campaign:

[Tom Tamlyn]

The BBC report additionally contains two images credited to Sean, one of the forum's principal image magicians, and one credited to Kevin Gill, an active space image processor and also a forum member, although apparently not an active poster.

[mcaplinger]

Wallpaper version of the 4 GRS images from the Perijove 7 campaign...

Beautiful job. I think we might use this in our press release if it's OK with you. One minor quibble: these images were taken at 02:03, 02:07, 02:10, and 02:12 UT (Spacecraft Event Time) on 11 July 2017. I think there might be some time zone confusion going on.

[jccwrt]

Beautiful job. I think we might use this in our press release if it's OK with you. One minor quibble: these images were taken at 02:03, 02:07, 02:10, and 02:12 UT (Spacecraft Event Time) on 11 July 2017. I think there might be some time zone confusion going on.

Yeah, I'm fine with that. I meant to put the time of perijove on the image, but it looks like I found the wrong time. At any rate, I've uploaded a version to the Juno website without the text if that helps.

EDIT: Changed the image to the correct perijove time.

[Bjorn Jonsson]

A bit late to the party but here are my versions of the PJ7_60 image. As I usually do I decided to break this up into three separate images to get something similar to what one would obtain with a regular camera at Jupiter. To show Jupiter from limb to limb requires a *very* wide field of view, much wider than a typical camera has.

These are approximately true color/contrast views. The only enhancement is that I sharpened small scale features a bit, mainly to compensate for the resampling that occurred during some of the processing steps. These images have the same resolution in km/pixel as the original framelets.




And the associated metadata for image PJ7_60:

IMAGE_TIME = 2017-07-11T02:07:07.724
MISSION_PHASE_NAME = PERIJOVE 7
PRODUCT_ID = JNCE_2017192_07C00060_V01
SPACECRAFT_ALTITUDE = 9866.1 km
SPACECRAFT_NAME = JUNO
SUB_SPACECRAFT_LATITUDE = -24.4222
SUB_SPACECRAFT_LONGITUDE = 58.2555
TITLE = POI's: The Great Red Spot, Edge of Great Red Spot, Within the Wake of the Great Red Dot
Resolution at nadir: ~6.6 km/pixel

Murphy's law struck during the processing. Windows decided that it would be a good idea to reboot my machine about 30 minutes after I went to sleep last night. At that time my machine was running 6 instances of the software I use to process and reproject the raw framelets. This delayed everything by at least 5-10 hours. I thought I had managed to completely prevent these unwanted reboots but no - they still happen but now only on rare occasions (in particular occasions when I absolutely don't want them...).

[Sean]

PJ07_62 from Gerald's batch...


PJ07_62_detail

[Sean]

PJ07_60 Detail v2


Some agressive processing to try to eke more variation.

[Bjorn Jonsson]

Here is an aproximately true color/contrast animation showing how Juno's rotation sweeps JunoCam's field of view across Jupiter's disc from north to south:

https://vimeo.com/225551533

The animation is from Juno's position when it was obtaining the PJ7_60 framelets. It is based on SPICE data for Juno's position and JunoCam's pointing. For clarity it has been slowed down by a factor of 2 relative to Juno's spin rate. The horizontal field of view (FOV) is 57 degrees. The time it takes to see Jupiter from limb to limb shows very well how large Jupiter appears to Juno at this close range (a FOV of more than 120 degrees would be needed to show Jupiter from limb to limb).

[Sean]

I posted this image...


based on a scale comparison in this video...
Juno footage & Earth scale

I have responses ranging from 'Spot On' to 'Wrong'...both from academics.

I'm concerned that I have unintentionally muddied the water on this and hope someone here will provide some accurate scales with which to fix the post...or not.

*updated link to replace fix*

[mcaplinger]

I have responses ranging from 'Spot On' to 'Wrong'...both from academics.

I'm afraid I'm solidly in the "wrong" camp on this -- based on some rough sanity checks based on the size of the Spot you have the Earth 2-3 times too small. Junocam images are tricky, as the scale varies a lot over the image due to foreshortening. I wouldn't trust most people to be able to definitively figure this out; I can't do it myself without doing a little work, which I'll do later today.