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Cassini's Extended-Extended Mission, July 2010-June 2017
volcanopele
post Feb 6 2009, 03:35 AM
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Perhaps now would be a good time to start a new thread on the Extended-Extended Mission.

http://www.space.com/news/090127-cassini-m...-extension.html
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brellis
post Feb 6 2009, 05:28 AM
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One hopes the thruster swap doesn't affect any decision on long term planning - science daily article
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Juramike
post Feb 6 2009, 03:38 PM
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Wait....what?

(from space.com article)
"such as evidence of what appear to be cryovolcanoes spewing extremely cold liquid into the atmosphere of Titan."

Did someone detect lower temperature spray actively venting????




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volcanopele
post Feb 6 2009, 05:26 PM
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VIMS may have detected photometric changes at Hotei Arcus and in a region of Western Xanadu.

http://gishbar.blogspot.com/2008/10/dps-meeting-so-far.html


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Juramike
post Feb 6 2009, 06:01 PM
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Ahhh, OK, I get it:

The material when erupted would have been "extremely cold" by our standards, but probably warmer than the surface temp by Titan standards.
(So, an erupting plume of locally cooler material was NOT detected on Titan)

Sorry if I got a little pedantic, I wanted to confirm I hadn't missed something....


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volcanopele
post Feb 6 2009, 10:09 PM
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Of course, I didn't start this thread completely randomly:

http://saturn.jpl.nasa.gov/news/significan...events20090205/

QUOTE
Thursday, Jan. 29 (DOY 029)

Today at the Executive Session of the Cassini Project Science Group
meeting, a tour was selected from among four candidates to be part of
a proposal to be made to NASA next week for a follow-on mission after
the current extended Cassini mission is complete.


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ngunn
post Feb 6 2009, 10:41 PM
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Does that mean that a tour has to be selected before the go-ahead is given for another extension? That seems the wrong way round to me.

BTW Do you know what the four candidates were? (Yes or no will do.)
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volcanopele
post Feb 6 2009, 10:56 PM
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Yes, I do know what the four candidates were. The one selected is pretty good and it seemed to please the most groups in Cassini (obviously, why else would it be selected). I preferred some of the Titan flybys in another tour, but since the tour selected won't exactly match the one that will be flown, who knows, maybe one the Nav guys and gals can adjust one of the Titan flybys to look like one of the ones from one of the tours not selected.

QUOTE
Does that mean that a tour has to be selected before the go-ahead is given for another extension? That seems the wrong way round to me.

Well, in a way it might seem like the backward way to go, but when you propose a plan to NASA for an extended mission, it is probably a good idea to have... a plan: a plan for how you plan to spend the money you are requesting and a plan for how the extended mission will look. We can go to NASA and tell them what we plan on doing in 2016, how many moons we will fly by, and how many times.


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Greg Hullender
post Feb 6 2009, 11:00 PM
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When I read about this last year

http://www.lpi.usra.edu/opag/march_08_meet...ons/spilker.pdf

I read that the prime mission had managed to get radar coverage of 22% of Titan's surface and that the XM would get an additional 8% -- for a total of 30% across 6 years. There was no mention of how much the 7-year XXM might get, but it would be nice to know. Is it reasonable to hope for an additional 20% coverage (for 50% total)?

--Greg

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volcanopele
post Feb 6 2009, 11:03 PM
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At this point we have JUST selected which tour we want to fly, and at this point, it is too early to start slicing it up until we know kind of funding we will be look at for the XXM.


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jsheff
post Feb 7 2009, 01:50 AM
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Can you give us any highlights? Any Iapetus flybys?
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stevesliva
post Feb 7 2009, 05:23 AM
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QUOTE (jsheff @ Feb 6 2009, 09:50 PM) *
Can you give us any highlights? Any Iapetus flybys?


The image of passing between the rings and he cloudtops is a nice tease...
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volcanopele
post Feb 20 2009, 10:06 AM
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QUOTE (jsheff @ Feb 6 2009, 06:50 PM) *
Can you give us any highlights? Any Iapetus flybys?

Nope, we don't come any closer than 900,000 km of Iapetus.

There are some nice encounters currently planned. Quite a few Titan and Enceladus (12 < 10000 km) encounters. The long mission does afford quite a few nice encounters of some of the other moons. If you like little rocks, mark May 20, 2012 on your calender (Methone and Telesto). Someone must really like Helene for some reason...


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Mariner9
post Feb 20 2009, 04:50 PM
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Twelve more close Enceladus encounters???? Oh joy. More skeet shoots. More global mosaics. More 'sniffing' the plumes.


A lot of people, myself included, get a bit morose when we think about how long it will be before the next Saturn mission arrives. But I am heartened by something I heard once in a lecture at JPL.

Ellen Stofan was giving a talk on discoveries at Io by the Galileo mission. I think an audience member asked her if she had any regrets about the high gain antenna problem, and the data she had lost because of it. She told us of a conversation with a Voyager researcher, who had said that he did most of his research on Io based on about 20 key images from Voyager. She went on to say that she did wish they had some additional thermal map images, but she was pleased with the rest of the data set, and wasn't even sure if she would be able to handle much more.

I'm sure she was putting a bit of a positive spin on things, but it was an interesting point. Twenty of the right pictures are worth more than 200 images at random. By the end of Cassini's mission we will have had more than twenty close flybys of Enceladus, with a carefully selected set of gravity, fields, particles, and remote sensing data.


And that ain't chicken feed.
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Byran
post Feb 21 2009, 10:27 AM
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volcanopele, when publish the complete list of all flybys the Cassini's Extended-Extended Mission mission?


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