Juno perijove 8, September 1, 2017 |
Juno perijove 8, September 1, 2017 |
Aug 21 2017, 09:13 PM
Post
#1
|
|
Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
It's time to open a Perijove-8 thread. Only a little more than two days are left for voting. For this perijove pass, JunoCam is scheduled to use more memory than during any previous perijove pass. Therefore, we have the best conditions to collect a considerable number of images, and images of good quality.
One of my votes went to an image near the equator, in order to give the ops team the opportunity to take a lossless image from very close up. In previous perijoves, these very close ups suffered a bit from lossy compression. This time, we may have one of the rare chances to find out, whether subtle small features are present, but escaped notice due to high compression rates. My other votes are for the subpolar regions with the fascinating FFRs. But I don't make specific recommendations, since I'm hoping for a full latitude coverage in good quality. Besides their science value, such a sequence will be a good basis for a pole to pole animation. I'm also curious, whether we can learn more about the polar regions. These images are scheduled in any case. Besides low TDI images, I'm hoping for some high TDI images in order to get high S/N for the circumpolar storm systems. For Perijove-8, we'll get approach and departure images for a global map. So close to solar conjunction, those are of more interest than in times with good observational conditions from Earth. Unfortunately, during Perijove-9, obtaining a global map will be much harder, if possible at all. And as a special bonus, an image if Io is scheduled for PJ-08. My time for processing these images is very restricted in September. But I'll try to cover the full suite of close-ups as soon as the raws become available, nevertheless. |
|
|
Oct 7 2017, 08:28 PM
Post
#2
|
||
IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
The central image in the above post has some of the best examples of direct imaging of (probable) cloud elevation differences that I have seen in images of Jupiter. Here is an enlarged crop from the image with some annotations:
The sun illuminates the clouds from the west (left) in this image. Keeping this in mind it's looking very much like we are seeing 'topography' at various locations, in particular around the vortex left of center: A: Clearly defined 'valleys'. B: More subtle 'valleys' than in A. C: Elevated and elongated high altitude 'walls' of clouds that are apparently roughly parallel to the wind direction around the vortex. D: Elevated clouds that have a more irregular shape than the clouds in C. There are also some some subtle indications that narrower and subtle 'valleys' and 'ridges' may spiral into the vortex toward its center. It is possible that these features are due to clouds of different color/brightness and not due to altitude differences. However, looking at the image, altitude differences look to me like the obvious (and more likely) explanation. |
|
|
||
Lo-Fi Version | Time is now: 22nd September 2024 - 11:41 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |