..and the return of the playback list
Full Version: T34 (July 19, 2007)
Mission description online: http://saturn.jpl.nasa.gov/multimedia/prod...description.pdf
..and the return of the playback list
..and the return of the playback list
Now THAT is an equatorial flyby!
Woo hoo! Delighted to see those playback timelines return. They really help deliver blow-by-blow detail on the timing of observations.
--Emily
--Emily
QUOTE (T34 Description)
During that period, the Cassini HGA boresight is continuously maneuvered to point to the region on Titan's surface where mirror-like (specular) reflection, if detectable, can be observed at the NASA DSN ground receiving stations at Goldstone and Canberra...
...Potential detectability of a weak echo strongly depends on potential presence of relatively flat (liquid or solid) Titan terrain within the HGA footprint over the surface region probed (the ground track). The T34 observation geometry also enjoys the advantage of extending in time till near C/A where a smaller distance to the surface enhances the measurement signal-to-noise ratio, hence enhances potential detectability of any weak surface echo.
...Potential detectability of a weak echo strongly depends on potential presence of relatively flat (liquid or solid) Titan terrain within the HGA footprint over the surface region probed (the ground track). The T34 observation geometry also enjoys the advantage of extending in time till near C/A where a smaller distance to the surface enhances the measurement signal-to-noise ratio, hence enhances potential detectability of any weak surface echo.
Looking forward to that.
Apologies if I've missed some update somewhere, but are we still a bit behind with the release of radar images? Seems like yonks since we saw any more data on lakes/seas etc.
Apologies if I've missed some update somewhere, but are we still a bit behind with the release of radar images? Seems like yonks since we saw any more data on lakes/seas etc.
QUOTE (elakdawalla @ Jul 13 2007, 11:44 AM) 
Woo hoo! Delighted to see those playback timelines return. They really help deliver blow-by-blow detail on the timing of observations.
--Emily
--Emily
Images playback on Thursday. Shouldn't be any problem getting them onto the raw image pages then.
The delays that I've seen have occurred when images arrived on the weekend, like the images from T33 which still are not up
New Titan image are up.
http://saturn.jpl.nasa.gov/multimedia/imag...0&storedQ=0
Another crater?
Click to view attachment
Original image
http://saturn.jpl.nasa.gov/multimedia/imag...2/N00086533.jpg
http://saturn.jpl.nasa.gov/multimedia/imag...0&storedQ=0
Another crater?
Click to view attachment
Original image
http://saturn.jpl.nasa.gov/multimedia/imag...2/N00086533.jpg
Cool-o!
Here is a context image: http://saturn.jpl.nasa.gov/multimedia/imag...2/W00030649.jpg
And craterform indicated in this image below:
Click to view attachment
(It looks similar in size to the sliced carrot feature in Shangri-La, but without the slices?)
-Mike
[EDIT: Alan had already indicated the crater nicely in his post.]
Here is a context image: http://saturn.jpl.nasa.gov/multimedia/imag...2/W00030649.jpg
And craterform indicated in this image below:
Click to view attachment
(It looks similar in size to the sliced carrot feature in Shangri-La, but without the slices?)
-Mike
[EDIT: Alan had already indicated the crater nicely in his post.]
Context image coupled with Fensal-Aztlan mosaic showing S Senkyo basin. Putative tectonic lines in Quivra and Aztlan line up with the sets of lines seen in the southern part of the new image in S Senkyo. (Also lines up with putative grabens in N Tseghi and NE Tseghi.)
Click to view attachmentClick to view attachment
Generation III squish vector corresponding tectonic ridges - yellow
Generation II squish vector corresponding tectonic ridges - purple
Note possible breach in circular feature wall indicated by orange arrow.
Man, I hope we got higher res images of this! And VIMS would be awesome also!
I'll bet that blob to the SW of the new crater is going have similar properties as Adiri.
(Can we go back and get a RADAR swath?
)
Whoo-hoo!
-Mike
Click to view attachmentClick to view attachment
Generation III squish vector corresponding tectonic ridges - yellow
Generation II squish vector corresponding tectonic ridges - purple
Note possible breach in circular feature wall indicated by orange arrow.
Man, I hope we got higher res images of this! And VIMS would be awesome also!
I'll bet that blob to the SW of the new crater is going have similar properties as Adiri.
(Can we go back and get a RADAR swath?
)Whoo-hoo!
-Mike
QUOTE (alan @ Jul 20 2007, 12:21 PM)
Could be. My thinking though is probably not.
Wrong part of Titan, Mike.
No way! 
(meant in a non-combatitive "OMG, I sure hope I didn't screw this up" manner)
(What is the lat/lon of Alan's image?)
-Mike
(meant in a non-combatitive "OMG, I sure hope I didn't screw this up" manner)(What is the lat/lon of Alan's image?)
-Mike
Juramike, your context image was taken before closest approach. I believe you have it upside down.
Edit, scratch that, I checked the CICLOPS page, it looks OK .
Edit, scratch that, I checked the CICLOPS page, it looks OK .
Hmmm....Well, it looks like this particular area in S Senkyo might have been examined and described before:
See: Perry, J. et al LPS XXXVIII (2007) p. 2219. “Cassini ISS observations of Titan: The Titan-20 flyby.” Abstract freely available here.
If the dark circle is indeed an impact feature, then it appears to be a heavily eroded, ragged, breached, and dune-sand filled Generation I feature (relatively young – no squish). Probably the only way to confirm it is similar to other circular features would be SAR RADAR imaging of the putative walls and the center.
(From the imaging so far, it still could be a crater, but I wouldn't bet the farm on it.)
The “tectonic” ridges and lines inferred in the post above mesh nicely with the processed images in the abstract.
-Mike
See: Perry, J. et al LPS XXXVIII (2007) p. 2219. “Cassini ISS observations of Titan: The Titan-20 flyby.” Abstract freely available here.
If the dark circle is indeed an impact feature, then it appears to be a heavily eroded, ragged, breached, and dune-sand filled Generation I feature (relatively young – no squish). Probably the only way to confirm it is similar to other circular features would be SAR RADAR imaging of the putative walls and the center.
(From the imaging so far, it still could be a crater, but I wouldn't bet the farm on it.)
The “tectonic” ridges and lines inferred in the post above mesh nicely with the processed images in the abstract.
-Mike
QUOTE (T34 Mission Description)
During that period, the Cassini HGA boresight is continuously maneuvered to point to the region on Titan's surface where mirror-like (specular) reflection, if detectable, can be observed at the NASA DSN ground receiving stations at Goldstone and Canberra. The T34 experiment enjoys the unique advantage of an observation geometry near the Brewster angle of likely surface compositions throughout the 65 minutes observation period. This special geometry allows unambiguous determination of the surface dielectric constant, and hence its physical state and properties, from simultaneous measurement of the RCP and LCP (right and left circularly polarized, respectively) echo components, if detectable.
The Cassini Events log said that these observations were very successful. I'm not holding my breath waiting for analysis - well I guess I am - but I suspect the team will mull over these data for some time before publishing. Titan hasn't failed to surprise us yet.
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