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NASA’s Juno Spacecraft Sends First In-orbit View

nasa.gov

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Re: NASA’s Juno Spacecraft Sends First In-orbit View

#81

Post by mediocrejoker »

ianai wrote: post #60
sophacles wrote: post #41

Earlier quoted context omitted.

This brings to mind a moment in the movie Apollo 13 , where one of the supporting characters says something to the effect of: "Leave it to NASA to make a moon landing boring". I think it says a lot of great things about NASA that people consider putting a satellite in orbit around Jupiter to be routine. Further great things from the fact that they really want NASA to stop being "boring" and invent some crazy new thin…

I propose the unit of militaries as a new standard measurement.

The problem is that 0.03 militaries is 30 millimilitaries.

Or maybe that's not a problem.

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#82

Post by JoeAltmaier »

jessriedel wrote: post #18
neals wrote: post #17

Are we going to get amazing Pluto-like images, like that chilling closeup? They really impressed me A LOT. Or is Jupiter close enough for us to already know enough about its surface?

Jupiter either doesn't have a solid surface, or it lies very deep inside (like 4/5ths of the way to the center). So there isn't any surface to see, just clouds. Juno will be passing within 3,000 miles of the tops of Jupiter's clouds. Since Jupiter's radius is 43,000 miles, it will fill the entire frame. The only question is how high-quality the camera is. The camera is for public relations only (no science) and I don…

In fact I believe Juno has ice-penetrating radar, intended to probe for the mythical surface. We may be seeing images of its real surface for the first time soon

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#83

Post by mturmon »

jessriedel wrote: post #74
jonknee wrote: post #67

Earlier quoted context omitted.

Resolution has very little to do with it. Many images from NASA are stitched, even the ones from New Horizons. The important part is light sensitivity (in the correct wavelengths!) and making sure that it can work in the radiation of Jupiter. You can go buy a camera with the same sensor if you'd like, but they're expensive: http://www.qsimaging.com/620-overview.html I believe it's the same sensor that flew on the Cur…

As you'll see if you look above, it was you who brought about the size of the sensor when critiquing my comment, which was addressing resolution. You also seem to feel the need to defend Juno, as if I was attacking it somehow, so I don't think this conversation can be very productive.

Yes, I think the casual "basically a cell-phone camera" comment you made, way above, has been taken to mean "it's a POS".

But, as you have made clear, you were just making a statement about the combination of wide field-of-view (i.e., the optics) and the number of pixels, which both figure in to resolution. (By contrast with the New Horizons LORRI instrument, which had a very narrow FOV, because they did not approach Pluto closely.)

If one takes a breath and re-reads what you wrote, this meaning is evident. On the other hand, it's very easy to mis-interpret what you wrote.

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#84

Post by mturmon »

JoeAltmaier wrote: post #82
jessriedel wrote: post #18

Earlier quoted context omitted.

Jupiter either doesn't have a solid surface, or it lies very deep inside (like 4/5ths of the way to the center). So there isn't any surface to see, just clouds. Juno will be passing within 3,000 miles of the tops of Jupiter's clouds. Since Jupiter's radius is 43,000 miles, it will fill the entire frame. The only question is how high-quality the camera is. The camera is for public relations only (no science) and I don…

In fact I believe Juno has ice-penetrating radar, intended to probe for the mythical surface. We may be seeing images of its real surface for the first time soon

I do not believe radar is part of the instrument set.

There is a "gravity sensor" which is really, I think, an extremely careful Doppler measurement which will allow us to infer the mass distribution within Jupiter.

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#85

Post by weberc2 »

mikestew wrote: post #76
drzaiusapelord wrote: post #35

Earlier quoted context omitted.

>Stacked 400 best in Autostackert This isn't a photo. It a photoshop fiction of 400 different photos blended together. There's a big difference between that and a single frame from a spacecraft. Comparing the two seems silly.

Don't ever use the HDR function on your camera, then. For that matter, you'd probably want to avoid digital cameras in general unless you're RAW-only.

Is this the photog equivalent of "Real programmers use butterflies"?

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#86

Post by ceejayoz »

cryptoz wrote: post #73
drzaiusapelord wrote: post #33

Earlier quoted context omitted.

>SpaceX might launch a Mars lander during the 2018 low energy window. Is this budgeted? Is it on a launch docket? Is there a rocket ready for it? Is the lander completed? 2018 is right around the corner and frankly I'm getting sick of "Spacex might" comments. There's a big difference between "might" and "do." When you see a mission on the NASA roster, its ready to go and unless there's some serious technical issue, i…

> Is this budgeted? Yes. > Is it on a launch docket? Yes. > Is there a rocket ready for it? It's being built right now, the test is in December. > Is the lander completed? It's being built right now, the test is soon. > 2018 is right around the corner and frankly I'm getting sick of "Spacex might" comments. SpaceX has completed every single thing they have ever said they would do, except for things that remain in the…

I think you're mixing up Falcon Heavy / Crew Dragon with the proposed 2018 Mars mission, "Red Dragon" (which will probably launched by a Falcon Heavy, but will involve a heavily modified Dragon v2). My understanding is we won't have any details on Red Dragon until September.

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#88

Post by JoeAltmaier »

mturmon wrote: post #84
JoeAltmaier wrote: post #82

Earlier quoted context omitted.

In fact I believe Juno has ice-penetrating radar, intended to probe for the mythical surface. We may be seeing images of its real surface for the first time soon

I do not believe radar is part of the instrument set. There is a "gravity sensor" which is really, I think, an extremely careful Doppler measurement which will allow us to infer the mass distribution within Jupiter.

Yeah you're right. I was remembering the Europa probe I think. They did parts of both at the local University some years back.

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#89

Post by jessriedel »

mturmon wrote: post #83
jessriedel wrote: post #74

Earlier quoted context omitted.

As you'll see if you look above, it was you who brought about the size of the sensor when critiquing my comment, which was addressing resolution. You also seem to feel the need to defend Juno, as if I was attacking it somehow, so I don't think this conversation can be very productive.

Yes, I think the casual "basically a cell-phone camera" comment you made, way above, has been taken to mean "it's a POS". But, as you have made clear, you were just making a statement about the combination of wide field-of-view (i.e., the optics) and the number of pixels, which both figure in to resolution. (By contrast with the New Horizons LORRI instrument, which had a very narrow FOV, because they did not approach…

Your thoughtful refereeing here is much appreciated :)

Re: NASA’s Juno Spacecraft Sends First In-orbit View

#90

Post by gene-h »

kchoudhu wrote: post #31
peter303 wrote: post #30

Earlier quoted context omitted.

A late 2020s Europa mission has been given development money. It will take about five years to launch and another five to arrive. Europa has a large interior ocean under the ice and maybhave life. It has enough energy to keep water liquid at certain depths and drive life. A Europa mission might resemble Cassini and Juno: orbiting the main planet with frequent flybys of the moon. This requires less fuel and keeps the…

I seem to recall hearing that the funding for this was contingent on there being a lander as well?

It's also contingent on NASA using the SLS as a launch system[0].

[0] http://www.thespacereview.com/article/3025/1

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