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Rosetta - Post Separation Ops at Comet 67P C-G, November 14, 2014 -
bkellysky
post Sep 30 2016, 11:25 AM
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All done.
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Gerald
post Sep 30 2016, 11:32 AM
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Rosetta's last signal at about 13:20 CEST on September 30, 2016:
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nprev
post Sep 30 2016, 11:52 AM
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Major congratulations and thanks to the Rosetta team for executing and completing this incredibly audacious mission. What an amazing ride! smile.gif


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elakdawalla
post Sep 30 2016, 12:18 PM
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Holger Sierks just came down and showed us some images that are not on the Web as animated GIFs of the final images sent before touchdown. I snapped a bunch of pics with my phone as they animated. Sorry for the low quality. There will be many duplicates in here. Thought you folks would like to play with them.
https://planetary.s3.amazonaws.com/emily/Rosetta.rar


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machi
post Sep 30 2016, 12:42 PM
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Thank you Emily!

Here is the last image (distance 51m) from the OSIRIS camera after deconvolution.

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Explorer1
post Sep 30 2016, 04:06 PM
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A poignant end; that last one reminds me of NEAR's last image, with the data drop-out as the signal was lost smearing the bottom.
A fantastic end to a fantastic mission, 12 years without touching anything solid, until now. Whether the spacecraft will ever be seen again, and in what condition, is a question for the ages...
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mgrodzki
post Sep 30 2016, 04:17 PM
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Hey — do we know the lines and specks are cometary dust and not just some kind of image anomalies? If that is dust, this image is pretty exciting to just look at. Not to mention the radical floor and then side wall that just shoots up to the left (after rotation that is).

QUOTE (stevelu @ Jun 3 2016, 05:19 AM) *
Cheers all.

I've been surprised to drop by a couple of times and not see any attention here to the brand new OSIRIS images being posted by https://twitter.com/Rosetta_OSIRIS and at https://planetgate.mps.mpg.de/Image_of_the_...fD_archive.html

Here's a rotated crop from the latest, "a dusty comet", taken 6/1/2016 from about 20km using the narrow angle camera.

[attachment=39503:67p_a_du...r_R_crop.jpg]



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mgrodzki
post Sep 30 2016, 04:39 PM
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I did this (just for fun — not for science). Manually tried to enhance the details and reduce noise while retaining what i think is cometary dust.
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Phil Stooke
post Sep 30 2016, 05:40 PM
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"Hey — do we know the lines and specks are cometary dust and not just some kind of image anomalies? If that is dust, this image is pretty exciting to just look at. "

Yes we do know it's dust. Check out this animated GIF showing that dust moving around. (Also we have the same at Comet Hartley-2)


http://sci.esa.int/rosetta/56343-comet-67p...ty-environment/


Phil


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katodomo
post Sep 30 2016, 06:21 PM
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QUOTE (machi @ Sep 30 2016, 02:42 PM) *
last image (distance 51m)

The distance for the picture has been revised and is currently estimated at 20 meters.

http://blogs.esa.int/rosetta/2016/09/30/co...ent-image-51-m/

I'm not entirely sure if the caption below the picture has also been updated, given it cites a "scale" of 5 mm/pixel which for OSIRIS WAC would be the resolution at around 50m.
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Roman Tkachenko
post Sep 30 2016, 07:52 PM
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JohnVV
post Sep 30 2016, 08:35 PM
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one of the issues with the last esa image is the JPG artifacts
-- close up of a hipass


this needs to be removed , then sharpened

and

but if you sharpen it too much it looks bad
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Floyd
post Sep 30 2016, 09:23 PM
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I'm assuming some of the fuzziness compared to other stunning images is the camera system was not meant to focus on nearby objects, but rather essentially infinity??


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fredk
post Sep 30 2016, 09:30 PM
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QUOTE (JohnVV @ Sep 30 2016, 09:35 PM) *
this needs to be removed , then sharpened

What kind of low-pass are you doing? Ie is it somehow targeted at jpeg structure? If you're just doing a rolloff lowpass and then sharpening, you will have removed any residual real small-scale structure along with the artifacts.
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Tom Tamlyn
post Sep 30 2016, 10:48 PM
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QUOTE (Floyd @ Sep 30 2016, 05:23 PM) *
I'm assuming some of the fuzziness compared to other stunning images is the camera system was not meant to focus on nearby objects, but rather essentially infinity??


The OSIRIS reference paper, posted here, says this about the wide angle camera:
QUOTE
The optical performance is maintained essentially unchanged from infinity down to almost 500 m, so that no refocusing system is required.


On <ahem> April 1 of this year, the OSIRIS team posted an image of the principal investigator taken by the wide angle camera’s ground reference unit at a distance of 15 meters: https://planetgate.mps.mpg.de/Image_of_the_...016-04-01a.html

To my eye the test image looks less fuzzy than the actual final image, but the test image might not have been compressed, and of course the conditions and subject matter were different.

Congratulations and thanks to the team, and to the people who wrote about the mission for us.

This post has been edited by Tom Tamlyn: Sep 30 2016, 10:51 PM
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