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T58 (July 8, 2009 / Rev 114)
HughFromAlice
post Jul 30 2009, 04:14 AM
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QUOTE (titanicrivers @ Jul 30 2009, 09:21 AM) *
Based on the most recent CHARM presentations http://saturn.jpl.nasa.gov/video/products/...aProductsCharm/


Thanks for the link TR. The three presentations were all v interesting summaries (Spilker's, Cuzzi's and Turtle's) and I thought that the standard of graphics/presentation ranked with the best that I have ever seen from NASA. The Skeet shoot pics (p27 et seq - on Turtle's) seem a bit enhanced from earlier pics but I would have liked scale bars as on P26. It still blows me away that they (forgotten the smart guy's name whose original idea it was) slewed the spacecraft round so accurately that they got such crystal sharp images!! Cutting edge indeed.

Well worth a look.
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titanicrivers
post Jul 30 2009, 07:29 AM
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[quote name='HughFromAlice' date='Jul 29 2009, 10:14 PM' post='144039']
Thanks for the link TR.
The Skeet shoot pics (p27 et seq - on Turtle's) seem a bit enhanced from earlier pics but I would have liked scale bars as on P26. It still blows me away that they (forgotten the smart guy's name whose original idea it was) slewed the spacecraft round so accurately that they got such crystal sharp images!!



You're welcome HFA!
If you scroll down in the CHARM series you'll see the presentation on the Skeet shoot pics dated 11/25/2008. The names of the presenters are: Paul Helfenstein from the Imaging Team, John Spencer from the CIRS team and Sascha Kempf from the CDA team. I think the first person is the bloke who thought of and planned the skeet shoot imaging.
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HughFromAlice
post Jul 30 2009, 07:02 PM
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QUOTE (titanicrivers @ Jul 30 2009, 04:59 PM) *
Paul Helfenstein is the bloke who thought of and planned the skeet shoot imaging.


You've jogged my memory. It was!! http://www.planetary.org/blog/article/00001727/



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titanicrivers
post Jul 31 2009, 07:08 AM
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Greetings from Cassini !
Latest Postcard from Cassini of Titan in between T58 and T59 flybys. Images taken with different filters (indicated above each photo) on July 12, 2009 and received on Earth July 13, 2009. Titan was approximately 2,200,000 kilometers away from the camera in each case.

Attached Image
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Guest_Sunspot_*
post Aug 22 2009, 08:12 PM
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Guests






Interesting article from New Scientist :

Largest Lake on Titan varies in height by only 3 millimetres
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ngunn
post Aug 22 2009, 10:26 PM
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Sadly - or perhaps fortunately - Ontario is not the largest lake on Titan. Also, it may be flat at any one time, i.e. calm, but its level may vary seasonally by a lot more than millimeters. So, all in all, a pretty misleading headline. See:

http://adsabs.harvard.edu/abs/2009LPI....40.1990L

for the proper information.
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nprev
post Aug 22 2009, 11:23 PM
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That's by far the most concise & to the point abstract I've ever seen... laugh.gif


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A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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titanicrivers
post Aug 23 2009, 03:41 AM
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Here's the pdf file of the abstract:
Attached File(s)
Attached File  1990.pdf ( 218.44K ) Number of downloads: 253
 
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Juramike
post Aug 23 2009, 04:08 AM
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So, with lower density rock (ice), less viscous fluid (?), lower gravity, and thicker air....

How much farther could you skip a rock on Titan?

The Mechanics of Rock Skipping


--------------------
Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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titanicrivers
post Aug 23 2009, 04:33 AM
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How much farther could you skip a rock on Titan?

Search me. However on earth the record to beat is 51 skips and 250 feet!
http://www.msnbc.msn.com/id/21070570/

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Jason W Barnes
post Aug 23 2009, 11:30 AM
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QUOTE (nprev @ Aug 22 2009, 04:23 PM) *
That's by far the most concise & to the point abstract I've ever seen... laugh.gif


Note that it's another one of Ralph's patented Haiku abstracts, if you count the syllables . . .

- Jason
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nprev
post Aug 23 2009, 04:40 PM
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Hai, ah so ne!

Planetary wonk, publishes major findings, condensed and striking!


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A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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rlorenz
post Aug 23 2009, 06:34 PM
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QUOTE (titanicrivers @ Aug 22 2009, 11:33 PM) *
How much farther could you skip a rock on Titan?


This is clearly a question I should devote some effort towards considering, not least
since I have instrumented skipping stones with accelerometers etc.... as described in
my book 'Spinning Flight: Dynamics of Frisbees, Boomerangs, Samaras and Skipping
Stones'

Although there have been some neat analyses of the skipping process, the combined
aerodynamic-gyrodynamic-hydrodynamic problem of modeling an end-to-end stone
skip trajectory has not been satisfactorily modeled (e.g. as my book qualitatively notes,
the pitch-up aerodynamic moment and the pitch-down moment usually generated by
water impact at a positive angle of attack tend to make the spinning stone roll in
opposite directions)

Might be the viscosity and surface tension of Titan liquids affect the process in ways
that can only really be studied experimentally..
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titanicrivers
post Sep 13 2009, 07:24 AM
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The last Cassini web site Titan press image released was taken with the narrow-angle camera on July 9, 2009 (T58) shows a small part of Senkyo on the trailing hemisphere. This area had not been imaged in high resolution until the last several flybys. One can appreciate how recent imaging has filled in the Titan map gaps by looking at the Celestia Titan surface map (now several years old) and comparing it with the latest ISS Titan map. The graphic below depicts this.

Attached Image
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peter59
post Aug 5 2010, 07:04 AM
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T58 RADAR swath (with Ontario Lacus).
Attached Image


--------------------
Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html
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