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Cassini To "Skeet-Shoot" Enceladus

kdawson posted more than 6 years ago | from the pull-dammit dept.

Space 41

CheshireCatCO writes "When Cassini makes its closest approach (50 km) during the flyby of the moon Enceladus next Monday 11 August, the spacecraft will be zipping by too quickly to turn and image in the usual way. So the Cassini team will be trying something new: a 'skeet-shoot' of the surface. The spacecraft will start to spin before the closest approach to the south pole so that when the best resolution is possible, the moon will drift through the field of view slowly enough to acquire unsmeared images. Of interest are the eruption-sites on the surface that give rise to the plume extending thousands of kilometers into space and producing Saturn's E ring. This flyby will be optimized for the imaging instruments (ISS, VIMS, CIRS, and UVS) in contrast with the March flyby, which was designed for the fields-and-particles instruments."

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Oh great (2, Funny)

Anonymous Coward | more than 6 years ago | (#24525165)

Good way to start an inter-solar system war.

But only a good way... (1)

Channard (693317) | more than 6 years ago | (#24525741)

.. a great way would be to do the same, but to tie the famous Hadron Collider to it...

Re:But only a good way... (2, Funny)

Impy the Impiuos Imp (442658) | more than 6 years ago | (#24530745)

> "When Cassini makes its closest approach (50 km) during the flyby of the
> moon Enceladus next Monday 11 August, the spacecraft will be zipping by
> too quickly to turn and image in the usual way"

And here I thought Eve Online was making up a whole bunch of BS in the name of "game balancing".

Re:Oh great (1)

damn_registrars (1103043) | more than 6 years ago | (#24525785)

Good way to start an inter-solar system war.

Except that Enceladus is a moon of Saturn, which is in our solar system. Therefore it would be an intra- solar system war.

Assuming of course that a moon with no inhabitants somehow had a way to retaliate. But we can ignore that part for now since you were trying to be funny.

Re:Oh great (0)

Anonymous Coward | more than 6 years ago | (#24526121)

Now I know there are no limits to human nitpicking. :)

Re:Oh great (2, Informative)

Johnny Chinpo (1340653) | more than 6 years ago | (#24535403)

"nit picking" is two seperate words

Re:Oh great (0)

Anonymous Coward | more than 6 years ago | (#24579617)

I hate to nit pick, but "nit picking" are two separate words (not "is"). Now just wait until someone finds something to nit pick on this reply. =)

Re:Oh great (0)

Anonymous Coward | more than 6 years ago | (#24579755)

separate, not seperate.

Re:Oh great (-1, Offtopic)

Anonymous Coward | more than 6 years ago | (#24526035)

We're no strangers to love
You know the rules and so do i
A full commitments what I'm thinking of
You wouldn't get this from any other guy

I just wanna tell you how I'm feeling
Gotta make you understand

Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you


We've know each other for so long
Your hearts been aching
But youre too shy to say it
Inside we both know whats been going on
We know the game and were gonna play it


And if you ask me how I'm feeling
Don't tell me you're too blind to see
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you

uh oh (0)

ILuvRamen (1026668) | more than 6 years ago | (#24525205)

So I assume they don't wanna slow down once they're moving cuz that'd waste energy and take more energy to get going again and that's the whole problem here. So what happens when it wants to go through the McDonalds drive through on Pluto? (yeah there's one there) Nobody can make a burger that fast!

Re:uh oh (1)

faloi (738831) | more than 6 years ago | (#24525611)

It works out. The guy taking the order will be located so far away [usatoday.com] that you wouldn't be able to get your food anyway.

Skeet shoot? (1)

capnchicken (664317) | more than 6 years ago | (#24525225)

My Freudian meter just broke.

Re:Skeet shoot? (2, Informative)

sexconker (1179573) | more than 6 years ago | (#24526101)

No.

The slang "skeeting", "shooting skeet", etc. in regards to ejaculation is a reference to skeet shooting, in real life.

Launching clay pigeons (traditionally grey or white, now colored bright yellow or green or pink) at a low angle for target practice is not sexual.

Re:Skeet shoot? (1)

capnchicken (664317) | more than 6 years ago | (#24526671)

I worked at a gun range for a few years (where every clay pigeon I saw saw was brightly colored hunter orange with black on the bottom, btw).

Trust me, there is definitely something sexual about men shooting off their multi-thousand dollar guns for 4 hours a day, every day.

Re:Skeet shoot? (1)

Amorymeltzer (1213818) | more than 6 years ago | (#24528077)

That's like calling saying "Don Quixote rode her ass" and not expecting people to be thinking he just did the nasty with some windmill operator's daughter. We're filthy, immature creatures who never grew out of chuckling when you hear homo erectus. Take the classic riddle: What's a four-letter word for a woman ending in "unt?"

Protip: It begins with "A."

Re:Skeet shoot? (1)

iztehsux (1339985) | more than 6 years ago | (#24530417)

Skeet-Skeet-Skeet!

"Signed"? (1)

naich (781425) | more than 6 years ago | (#24525391)

What is with the "Signed" tag that is appearing on pretty much every /. story at the moment? What does it mean?

Re:"Signed"? (0)

Anonymous Coward | more than 6 years ago | (#24525855)

It means: "Blah, Blah, Blah" in Nahautl language

Re:"Signed"? (1)

isomeme (177414) | more than 6 years ago | (#24528819)

Damn, at last Slashdot has incorporated my last non-/. geekery, the study of Mesoamerican languages. I am one with the Borg.

Re:"Signed"? (1)

damn_registrars (1103043) | more than 6 years ago | (#24525883)

What is with the "Signed" tag that is appearing on pretty much every /. story at the moment? What does it mean?

The last time we had a spurt like that in tags, it came from the "don't tase me, bro" video. I suspect some goonies will probably start tagging with "dontsignmebro" tags.

The top results from youtube for "signed" are currently mostly related to Stevie Wonder. I somehow have a hard time imagining him running around applying this tag on slashdot.

LOL (0)

Anonymous Coward | more than 6 years ago | (#24525471)

Skeet skeet skeet

Obligatory (0)

Anonymous Coward | more than 6 years ago | (#24525865)

3,6,9 damn your fine move it to you sing it to me one mo time

Get low, Get low [x6]

To the window (TO THE WINDOW), to the wall, (TO THE WALL)

To the sweat drop down my balls (MY BALLS)

To all these bitches crawl (CRAWL)

To all skeet skeet motherfucker (MOTHERFUCKER!) all skeet skeet god damn (GOT DAMN)

To all skeet skeet motherfucker (MOTHERFUCKER!) all skeet skeet god damn (GOT DAMN)

WHAT? OK! (0)

Anonymous Coward | more than 6 years ago | (#24526585)

SKEET! SKEET! SKEET! SKEET!

Too many dirty jokes (1)

192939495969798999 (58312) | more than 6 years ago | (#24526651)

Skeet shoot? Eruption sites? E ring? Closest approach to the south pole? Unsmeared? ...error, too many possible dirty jokes! AAAH! (head asplodes)

Re:Too many dirty jokes (1)

c0ck_l0rge (1121281) | more than 6 years ago | (#24531143)

4 1 2 B 133+, h3 mus+ sk33+, sk33+, sk33+!

Finally! (1)

j!mmy v. (613784) | more than 6 years ago | (#24527293)

A harder shot than high house 2!

(For righties, naturally.)

--j!m

And for their next trick (1)

liquiddark (719647) | more than 6 years ago | (#24527527)

They will attempt to bend the light around the planet. Angelina Jolie has been suggested as a possible mission controller for this part of the mission.

Camera Technology (2, Interesting)

Detritus (11846) | more than 6 years ago | (#24528069)

Someone once told me that the military used a similar trick in the cameras used for low-level, high-speed reconnaissance in Vietnam. The pilot would overfly his target at tree-top level, to avoid enemy anti-aircraft fire. The camera had to compensate for the apparent motion of the target.

Re:Camera Technology (1)

Threni (635302) | more than 6 years ago | (#24580807)

> The pilot would overfly his target at tree-top level, to avoid enemy anti-aircraft fire. The camera had to compensate for the apparent motion of
> the target.

Let's hope this time the Americans are more successful than in Vietnam, eh?

Re:Camera Technology (1)

Detritus (11846) | more than 6 years ago | (#24581957)

The failure in Vietnam was political, not military.

Re:Camera Technology (1)

afxgrin (208686) | more than 6 years ago | (#24586257)

Yep, you can buy the cameras at Surplus Shed actually. (or you could last I checked ... like a year ago)

I imagine the tricky part is getting the correct film.

Re:Camera Technology (1)

Detritus (11846) | more than 6 years ago | (#24590255)

I could probably afford the camera and film. The tricky part would be getting the RF-4 recon aircraft. Thanks for the pointer to Surplus Shed.

Unsmearing (1)

4D6963 (933028) | more than 6 years ago | (#24528073)

Couldn't the "unsmear" the images anyways? The smear being essentially a convolution by a line, shouldn't it make it fairly easy to deconvolve?

Re:Unsmearing (1)

CheshireCatCO (185193) | more than 6 years ago | (#24529171)

Deconvolutions are generally iffy under any but the most ideal of circumstances, in my experience. With the point-spread function being what it is (complicated, that's what), we're not in the best of circumstances, either.

Re:Unsmearing (1)

4D6963 (933028) | more than 6 years ago | (#24532911)

Good point. As for the point-spread function I figured it could be accurately simulated knowing precisely the probe's trajectory wrt Enceladus and the camera's orientation and exposure time.

Re:Unsmearing (1)

CheshireCatCO (185193) | more than 6 years ago | (#24533863)

I actually meant the intrinsic PSF for the camera, which is somewhat complicated as it turns out. We've actually considered de-blurring before, but I don't think we had a lot of luck with it and it didn't seem worth it. I can recall trying to deconvolve Enceladus's bright limb with the PSF before and having that turn out awfully. For these, considering the speed, I think that de-blurring would be neigh impossible.

(It's also worth noting that we're aiming for science-class images here and not so just public releases. The standards for the former are higher than the latter, even small errors due to deconvolution are often unacceptable.)

Re:Unsmearing (1)

speedtux (1307149) | more than 6 years ago | (#24581703)

If you convolve noisy images with some filter, some information is irretrievably lost.

Do white people still not know? (1)

Vileedge (1231568) | more than 6 years ago | (#24528765)

Skeet skeet skeet

Re:Do white people still not know? (0)

Anonymous Coward | more than 6 years ago | (#24530875)

no just 99% of slashdot

rocket science (2, Informative)

drDugan (219551) | more than 6 years ago | (#24534213)

2 wind-up orbits around the sun, 2 gravitational slingshot maneuvers by Venus, one each by Earth and Jupiter, all with only 1 course correction. Then *7 years* later it goes into orbit around Saturn! Oh, and it is powered with Plutonium.
http://upload.wikimedia.org/wikipedia/en/b/bd/Cassini_interplanet_trajectory.svg [wikimedia.org]

It then sweeps by Enceladus 22 times, drops a probe on Titan, and does countless other science experiments and images

this is why the call it "rocket science". wow

makes you realize how someone might fo'get about metric and english systems.

It was a sound studio on Mars (1, Funny)

Anonymous Coward | more than 6 years ago | (#24536197)

Why should a tiny portion of taxpayer money go to something like this when we could spend billions of dollars on much more worthwhile endeavors, like building a while along our southern border, or bombing developing countries based on bad intelligence? It's an outrage that this country is willing to pour a fraction of a percent of total governmental funding into such a useless program. What good ever came of peaceful exploration and the research and development to make it all possible?

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