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Unmanned Spaceflight.com _ Cassini's ongoing mission and raw images _ Rev 008 Observations
Posted by: alan May 17 2005, 04:26 PM
Any observations of the moons planned during this flyby?
Posted by: Decepticon May 17 2005, 09:19 PM
I can't understand why this info is not posted on the cassini site.
Posted by: volcanopele May 19 2005, 11:48 PM
Should be some stuff about Enceladus. Hopefully we won't be data policed again
Posted by: dilo May 20 2005, 05:53 AM
Do someone really know the reason for stopping the raw images updates? 
I think we should take some action against this new "policy"!...
Posted by: Sunspot May 20 2005, 08:30 AM
No pictures for 2 weeks - I'm astonished people have only just noticed lol. Somethings up
Posted by: Decepticon May 20 2005, 02:23 PM
It's a good thing I live in Canada.
As a Amercian Tax payer I would really flip my lid.
Really something should be done.
Posted by: volcanopele May 20 2005, 05:29 PM
Data policing has absolultely nothing to do with the problems that the JPL raw images page has been having. We have been getting images (200 today alone) since May 6, they just haven't shown up on the JPL raw images page. Data policing caused us to lose our Tethys images earlier this month due to incorrect compression estimates of the preceding rings observation.
Posted by: mike May 20 2005, 07:14 PM
As a Amercian Tax payer I would really flip my lid.
Really something should be done.
So move to the US and complain..
Posted by: Decepticon May 20 2005, 07:25 PM
Posted by: tedstryk May 21 2005, 03:46 AM
New raws are up!!!!
Full Mimas set now posted!!!!
Check out this one - Dione with the rings over Saturn's night side!
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS10/N00034054.jpg
Posted by: dilo May 21 2005, 05:01 AM
New raws are up!!!!
Full Mimas set now posted!!!!
Check out this one - Dione with the rings over Saturn's night side!
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS10/N00034054.jpg
Great, it seems they are earing us!
(however, many images are missed, both thunbnails and med/full res...)
Posted by: tedstryk May 21 2005, 05:04 AM
New raws are up!!!!
Full Mimas set now posted!!!!
Check out this one - Dione with the rings over Saturn's night side!
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS10/N00034054.jpg
Great, it seems they are earing us!
(however, many images are missed, both thunbnails and med/full res...)
Given the fact that they are showing up but just not visible and giving error messages, my thinking is that all these problems are technical, and that nothing more "sinister" is at play.
Posted by: volcanopele May 21 2005, 07:24 AM
All images are up!! Even last months Mimas stuff.
Posted by: dilo May 21 2005, 07:28 AM
Another hoax theory?
I prefer techinical and/or under-staffing explaination...
Some further info from Volcanopele?
Posted by: tedstryk May 21 2005, 12:34 PM
Another hoax theory?
I prefer techinical and/or under-staffing explaination...
Some further info from Volcanopele?
No - I was just making reference to some of the complaints made. I am assuming that the problems are technical.
Posted by: alan May 21 2005, 06:55 PM
another shot of the wavemaker moon
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS11/N00034411.jpg
Posted by: dilo May 21 2005, 11:21 PM
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS11/N00034411.jpg
As usual, cannot resist to make the animation:
http://img262.echo.cx/img262/8276/thewavemaker26vx.gif
Posted by: tedstryk May 23 2005, 07:30 PM
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS11/N00034411.jpg
As usual, cannot resist to make the animation:
http://img262.echo.cx/img262/8276/thewavemaker26vx.gif
Did Enceladus get zapped? I am looking at the Rev 8 raws, and there are none to be seen.
Ted
Posted by: volcanopele May 23 2005, 07:44 PM
Ted
Edit: here's a wac associated with our nac frames:
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS11/W00006810.jpg
Posted by: Bjorn Jonsson May 23 2005, 11:58 PM
The Enceladus images are starting to appear at the JPL site. They look rather strange:
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40726
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40724
Posted by: Phil Stooke May 24 2005, 12:30 AM
This link:
www.ssc.uwo.ca/geography/spacemap/enindex1.htm
shows the complete Voyager 1 and 2 imaging sequence for Enceladus. The top row of four images is the Voyager 1 set, for comparison with these new images. They are specially processed to exaggerate faint dark markings, but the existence and shapes of the markings are real, not artifacts. Voyager 2 was too far north to see these markings.
The new images have the south pole at the top, and it's at the bottom in the Voyager 1 frames. You can never be quite sure when going from one filter to another, or one camera to another, but it certainly looks as if there have been major changes in the dark markings. If this is real... it's a very important observation. But maybe it's only differences in filters.
(enter 'enindex2' to see maps from these images)
Phil
Posted by: volcanopele May 24 2005, 12:30 AM
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40726
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40724
Strange indeed. I've been working all day processing these new Enceladus images (Enceladus is my third favorite world now!!). The tiger scratches are a puzzle. In higher resolution images,
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=34924
these stripes appear to resolve into arcuate ridges or scarps surrounded by bluish material. Yet another Enceladus mystery. Thankfully, we will get much higher resolution images on July 14 of these south polar features.
Posted by: volcanopele May 24 2005, 12:33 AM
www.ssc.uwo.ca/geography/spacemap/enindex1.htm
shows the complete Voyager 1 and 2 imaging sequence for Enceladus. The top row of four images is the Voyager 1 set, for comparison with these new images. They are specially processed to exaggerate faint dark markings, but the existence and shapes of the markings are real, not artifacts. Voyager 2 was too far north to see these markings.
The new images have the south pole at the top, and it's at the bottom in the Voyager 1 frames. You can never be quite sure when going from one filter to another, or one camera to another, but it certainly looks as if there have been major changes in the dark markings. If this is real... it's a very important observation. But maybe it's only differences in filters.
Phil
We actually see the albedo markings on the south ends of the images on the top row on your page. These "tiger stripes/claw marks" are farther south, so we don't have convincing evidence yet for surface changes.
Posted by: Phil Stooke May 24 2005, 12:42 AM
Yes, you're right. I just did the comparison with the new images rotated to match geometry and contrast stretched, and I see the 'old' dark markings are further north. Seasonal effect. Pity - it was a nice thought while it lasted! The south pole must be well onto the illuminated disk, presumably within the dark stripe area.
Phil
Posted by: volcanopele May 24 2005, 12:44 AM
Phil
I haven't pin-pointed the south pole, but yes, it is within the dark stripe area.
Posted by: dilo May 24 2005, 05:35 AM
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=34924
these stripes appear to resolve into arcuate ridges or scarps surrounded by bluish material. Yet another Enceladus mystery. Thankfully, we will get much higher resolution images on July 14 of these south polar features.
Hi, Jason. You tell about processing new Enceladus images, but the link above refers to a picture taken on March 09! So, I argue new images arrived but aren't yet published due to issue you previously mentioned, with exception of the two long-range images showing the "tiger stripes" near the south pole and some other even farther...
In fact, in the raw section still showing a lot of "missing links"... Hope will be fixed soon!
Posted by: tedstryk May 24 2005, 11:52 AM
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=34924
these stripes appear to resolve into arcuate ridges or scarps surrounded by bluish material. Yet another Enceladus mystery. Thankfully, we will get much higher resolution images on July 14 of these south polar features.
Hi, Jason. You tell about processing new Enceladus images, but the link above refers to a picture taken on March 09! So, I argue new images arrived but aren't yet published due to issue you previously mentioned, with exception of the two long-range images showing the "tiger stripes" near the south pole and some other even farther...
In fact, in the raw section still showing a lot of "missing links"... Hope will be fixed soon!
No, there are a few up. But some are missing.
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40726
Posted by: Decepticon May 24 2005, 12:45 PM
Tetheys http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS11/N00034723.jpg
Posted by: tedstryk May 24 2005, 02:01 PM
I enhanced the Enceladus image. It seems there may be fissures in the center of the dark streaks, but due to the jpegness, I can't tell for sure.
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Posted by: Phil Stooke May 24 2005, 04:44 PM
Epimetheus:
Janus:
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Pandora:
Phil
Posted by: volcanopele May 24 2005, 04:53 PM
Janus:
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Pandora:
Phil
Wow, jpeg artifacts really did a number on those
Posted by: tedstryk May 24 2005, 05:17 PM
Janus:
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Pandora:
Phil
Wow, jpeg artifacts really did a number on those
Yeah, this was the best I could pull out of them:
Posted by: volcanopele May 24 2005, 05:37 PM
In fact, in the raw section still showing a lot of "missing links"... Hope will be fixed soon!
I was just linking to the image from March 9 to show what these tiger stripes look like at higher resolution (at least near the limb). The image I processed yesterday is from this weekend and is now being discussed.
Posted by: Sunspot May 24 2005, 05:41 PM
I wonder if this could be a new moon, you can see a faint filament eaching up to a small spot just above the ring in the full size image.
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40736
Posted by: volcanopele May 24 2005, 06:51 PM
http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=40736
I'm thinking temporary clump. we have seen a number of these over the last year and we never seem to be able to find them again. however, it is interesting to see it interact with the rings.
Posted by: Bjorn Jonsson May 24 2005, 08:44 PM
I'm attaching a superresolution image of Enceladus that I did by stacking all 11 JPGs from the JPL raw image site and then then greatly sharpening the stacked image.
This brings out a lot of interesting details. The dark markings near the south pole (south is up) definitely look like Europa's 'triple bands' seen at similar resolution.
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Posted by: alan May 24 2005, 09:13 PM
Nice image of the cassini division
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS11/N00034683.jpg
I count 5 tiny "ring sheperds" in this image, one even appears to have a couple of waves to the left of it if you look closely enough. Probably all image artifacts though. Too bad there aren't any other images to compare it to. So how do those cosmic rays know where to hit 
Posted by: Decepticon May 24 2005, 10:47 PM
Are we looking at Enceladus from under the moon?
Its hard to get a bearing without a grid.
Also are these the best images, or are more on the way?
Posted by: volcanopele May 25 2005, 12:21 AM
These are the best images we will get this orbit of Enceladus. In the raw images, south is up, with the south pole in the middle of the second stripe from the right.
Posted by: Bjorn Jonsson May 25 2005, 01:12 AM
This is the viewing geometry:
I will soon (next weekend at latest) post diagrams showing the viewing geometry for the July flyby.
Posted by: Phil Stooke May 25 2005, 01:17 PM
Ja - I mean Volcanpele - said:
Wow, jpeg artifacts really did a number on those
and it took me all day to figure out why! Oh well... I won't post them now because he has a good set of rock pics on his Titan Today site. The interesting question now is, how do these images relate to Voyager views?
Epimetheus: corresponds roughly to Voyager 2 FDS 43991.14, the top left image at:
www.ssc.uwo.ca/geography/spacemap/epindex1.htm
centered about 150 longitude and a bit north of the equator.
Janus: presumably corresponds roughly to V1 FDS 34936.11, the bottom left image at:
www.ssc.uwo.ca/geography/spacemap/jaindex1.htm
centered about 300 long and a bit north.
Pandora: I don't know yet.
Phil
Posted by: Phil Stooke May 25 2005, 01:44 PM
These are the two best Voyager images of Pandora.
The odd-looking one is a narrow crescent with extensions to the right which are illuminated by Saturnshine.
The new Cassini view doesn't show as many craters as the best Voyager view, but the lighting is not the best for discerning topography.
Phil
Posted by: scalbers Jun 1 2005, 09:19 PM
Greetings Jason and all,
I have just posted an updated Enceladus map with two additional images of the south polar region.
It's really fascinating to view it in a perspective projection with the viewer near the south pole. Looks perhaps like some more recent resurfacing has been going on around the polar regions? The
cylindrical projection version is at the URL shown below.
http://laps.fsl.noaa.gov/albers/sos/sos.html#ENCELADUS
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