Juno perijove 7: GRS images, July 11, 2017 |
Juno perijove 7: GRS images, July 11, 2017 |
Jul 13 2017, 03:19 PM
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#46
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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. |
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Jul 13 2017, 03:22 PM
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#47
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Member Group: Members Posts: 306 Joined: 4-October 14 Member No.: 7273 |
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Jul 13 2017, 04:45 PM
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#48
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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Jul 13 2017, 05:59 PM
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#49
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Junior Member Group: Members Posts: 94 Joined: 22-May 08 From: Loughborough Member No.: 4121 |
I take it BBC's report includes some of the brilliant efforts off here?
http://www.bbc.co.uk/news/science-environment-40594126 |
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Jul 13 2017, 07:55 PM
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#50
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Senior Member Group: Members Posts: 2084 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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. |
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Jul 13 2017, 10:01 PM
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#51
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Member Group: Members Posts: 306 Joined: 4-October 14 Member No.: 7273 |
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Jul 13 2017, 10:54 PM
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#52
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Member Group: Members Posts: 444 Joined: 1-July 05 From: New York City Member No.: 424 |
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.
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Jul 13 2017, 11:16 PM
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#53
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
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. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jul 13 2017, 11:32 PM
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#54
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Member Group: Members Posts: 306 Joined: 4-October 14 Member No.: 7273 |
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. |
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Jul 14 2017, 01:15 AM
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#55
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IMG to PNG GOD Group: Moderator Posts: 2250 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
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...). |
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Jul 14 2017, 02:42 AM
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#56
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
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Jul 14 2017, 09:56 AM
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#57
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
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Jul 14 2017, 12:29 PM
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#58
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IMG to PNG GOD Group: Moderator Posts: 2250 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
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). |
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Jul 14 2017, 01:26 PM
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#59
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
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* -------------------- |
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Jul 14 2017, 01:55 PM
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#60
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
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. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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