T66 (January 28, 2010 / Rev 125) Options

[ngunn]

http://saturn.jpl.nasa.gov/files/20100128_...description.pdf

[titanicrivers]

[quote name='ngunn' date='Jan 19 2010, 12:17 PM' post='153617']
I look forward to peering through the haze at that dark patch at 40S 280W. BTW which is the best image we have of that so far?

VP's ISS basemap (from the T50 post #27) does a nice job also in showing that dark patch at -40 and 280 W. (Below). Agree it seems to have a channel (river) on the western end and wouldn't be surprised if its a dry lake basin.

[ngunn]

So it does! You know, I went back and checked post 29, where it doesn't show, but missed post 27. Thanks for posting that version with the lat and long.

[Juramike]

Raw images are up! Here's a shot of the W Adiri/E Belet. N is to the left. Seems kinda distorted (squished E-W). Way off-nadir maybe?

http://saturn.jpl.nasa.gov/multimedia/imag...7/N00150366.jpg

[titanicrivers]

Not too bad a fit on VP's ISS basemap!

[titanicrivers]

I haven't seen good raw images from the closeup portion of T66 and the imaging of the southern mid latitude and the enigmatic dark structure at -40 280 W (below). Some images seem to be missing or perhaps are too low in contrast to show much.

[Juramike]

Detail of Titan's limb around the "Dark Notch". (Which is my new favorite way to line up Titan' images, BTW).
This is a RGB[GRN,BL2,UV3] with a HiPass[BL2] overlay.



Some really interesting structure in the haze layers right around the notch. Almost appears that the uppermost (non-detached) haze layers are trying to override it on the north polar side.

North is towards the top left.

[nprev]

Huh. At what latitude is the 'notch' located, Mike? Looks like 60-70 deg to my uneducated eye.

[remcook]

http://www.unmannedspaceflight.com/index.p...st&p=153942
Apparently, a bit more south.

[Juramike]

Corrected the caption. North is more to the top left.

Here is the original BL2 filtered image: http://saturn.jpl.nasa.gov/multimedia/imag...7/N00150494.jpg
and a CL1 CB3 showing surface features : http://saturn.jpl.nasa.gov/multimedia/imag...7/N00150490.jpg

The notch is still about 30-40 N latitude. Interestingly enough, north of this latitude is where the ISS surface images of Titan get a little more bland, the RADAR images become more uniform, and crater counts seem to drop off. Coincidanza???

My wild-armed speculation is that haze-layer chemistry in the northern part may be held up north by the notch boundary. Which then allows particles to shizzle-down above this zone. This might switch over in the Southern winter. It would be real neat to see if the upper atmosphere chemical species/agglomerated particle sizes are different right on either side of this latitude.

[Phil Stooke]

Are we allowed to say shizzle on the internet?

Phil

[centsworth_II]

[titanicrivers]

Actually the notch has appeared in a number of previous Cassini images and seems associated with atmospheric bands. Some examples are shown below.

[Juramike]

Good shot over the W Belet Sand Sea. Up N, the Kraken Mare methane sea is visible. To the S, a cute little cloud can be seen.



Image is a stack of 3 raw images taken Feb 16, 2010. (HiPass filtered to bring out details)

[Juramike]

Very, very hard to tell, but I think the cute little cloud is no longer there in this image taken on Feb 17:
N00151680.jpg