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Rev 211 Looking for changes in Titan's northern hemisphere
titanicrivers
post Jan 2 2015, 09:14 PM
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Rev 211, now in progress has returned nice images of Titan from 12-30-2014. These are part of the ‘cloud monitoring’ photos taken when the northern lakes and seas are visible. This very busy rev is described in the Ciclops ‘Looking Ahead’ article here http://www.ciclops.org/view/7975/Rev211?js=1.
In the figure below I’ve put the 12-30-2014 image of Titan from the Looking Ahead article with the actual images from 12-30-2014. This comparison is helpful (for me at least) so that I can better analyze the brighter areas in the middle CL1 CB3 image as to whether clouds are present or not. (I must confess I don’t see any clouds).
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FOV
post Jan 3 2015, 01:50 AM
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This stood out for me titanicrivers: From Ciclops "Looking Ahead" article, on this Rev RADAR will acquire altimetry over Punga Mare, and RADAR SAR imaging across Ligeia Mare, including over "Magic Island".
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eliBonora
post Jan 11 2015, 06:38 AM
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I have played a little with Titan's filters!
This is a combined view with cb3, grn, bl and uv, 8 January:



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Lewis007
post Jan 11 2015, 12:07 PM
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Occultation by Saturn's rings of the star Spica (gif-view)
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Ian R
post Jan 11 2015, 12:28 PM
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Nice!


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titanicrivers
post Jan 12 2015, 04:12 AM
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As FOV points out above there’s many interesting things happening in Rev 211 including the T108 flyby today. My understanding is that RADAR (altimetry), CIRCS, and VIMS will observe Punga, obtaining data to deduce its composition and depth. (I’m thinking that part of it might be deep and part shallow based on its shoreline, location and size)
Shallow?
1) Previous SAR near some shorelines show possible ‘bottom’ echoes
2) Smaller than Ligeia and Kraken
3) Not as many shoreline steep drop-off areas
4) VIMS view shows ? evaporite surrounding some of shoreline (orange arrows in figure below)
5) Amount of ethane vs methane and density gradient (uncertain as far as I know, but to be constrained on this flyby)
Deep?
1) Parts have been truly SAR radar dark
2) Closer to the N pole (blue arrow) than Kraken or Ligeia so topography may favor deep.
3) Drowned rivers along the southern shoreline suggest greater depths than
in previous geologic time periods (white arrows)
4) Some smaller nearby lakes appear deep (Sparrow and Neagh Lacus)
5) As above if it’s mainly methane but has no bottom echo in places- suggest deep.

Other highlights of the T108 flyby including observations of Ligeia and Kraken and the labyrinth of channels connecting them can be found here. http://saturn.jpl.nasa.gov/mission/flybys/titan20150111/
Image below starts with the view of Cassini spacecraft (from the Looking Ahead article) over Punga (previous RADAR view and VIMS view from http://photojournal.jpl.nasa.gov/catalog/PIA17470) around closest approach and points out some of the observations noted above.
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titanicrivers
post Jan 21 2015, 07:17 AM
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Five T108 approach images during Rev 211. All are CB3 filter NAC views. The 4 larger images are centered near Elba Facula.

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