Juno development, launch, and cruise, Including Earth flyby imaging Oct 9 2013 Options

[Guest_AlexBlackwell_*]

What's the field of view of JunoCam and what is the size of an image?

I believe JunoCam FOV is 6° × 0.05°.

[volcanopele]

hmm, a push-broom detector? Assuming each image is 1024 pixels wide, that would indicate top resolutions of:

Amalthea: 11 km/pixel
Io: 27 km/pixel
Europa: 36 km/pixel
Ganymede: 44 km/pixel
Callisto: 42 km/pixel

[djellison]

JunoCam is a MARDI rip off isn't it? 1600 x 1200 RGB framing camera.

Doug

[Guest_AlexBlackwell_*]

I believe JunoCam FOV is 6° × 0.05°.

CORRECTION:

From Steve Matousek's paper ("The Juno NewFrontiers mission") currently in press with Acta Astronautica:

JunoCam is the E/PO camera. It is not a science instrument, and has no science requirements. JunoCam will not be permitted to impact S/C or science requirements. JunoCam captures three-color images of Jupiter with spatial resolution to approximately 15 km/pixel for public engagement and E/PO. It is mounted on the instrument deck with an unobstructed 18° ×3.4° FOV in the spin plane.

[vjkane]

What would be the resolution of JunoCAM at closest approach to Jupiter (ignoring smear)? Closest approach would be ~70,000 km. I believe that the Jupiter resolution quoted above is for the polar regions when Juno is still a fair distance away.

[Guest_AlexBlackwell_*]

Note that the Juno website was recently updated.

[nprev]

Little bit bummed that there isn't a radio DF experiment of some sort planned. Those three active source areas on the "surface" are still very mysterious; would like to at least set limits on their physical size.

[Del Palmer]

NASA awards Atlas V contract for Juno:

http://www.nasa.gov/home/hqnews/2007/oct/H...h_Services.html

[NMRguy]

NASA awards Atlas V contract for Juno:

I was going to say something about this being "An excellent choice" since NASA and Lockheed Martin have had such brilliant success with the Atlas V in the past. New Horizons and MRO launches were nearly flawless. But apparently Atlas V had its first hick-up last June with an NRO Reconnaissance Satellite. Too much of the important information is classified, however, and the launch has been deemed a "partial success". Nonetheless, I'm still willing to give [knock on wood] the Atlas V team the benefit of the doubt.

http://www.spaceref.com/news/viewnews.html?id=1222

[mchan]

Nonetheless, I'm still willing to give [knock on wood] the Atlas V team the benefit of the doubt.

http://www.spaceref.com/news/viewnews.html?id=1222

What would you rather use as a launcher?

For the injection energy to get Juno into its initial transfer trajectory to Jupiter requires a large booster. The other choices in 2011 will still be Delta-IVH (more expensive), Proton (not a US launcher for a US spacecraft and a rather more serious failure last month), and Ariane 5 (not a US launcher). None have expected mission success rates significantly higher than Atlas V. Unfortunately, with the market realities of low launch rates and high launch costs today and in the near future, the choices are rather limited. Falcon 9 looks promising as a lower cost choice, but it needs several successful flights to establish its reliability.

And that is an old article you cite that came out just after the launch with the usual tough sounding public sound bites expected at those times. Here is a more recent one with more balanced reporting:

http://spaceflightnow.com/news/n0708/16rl10valve/

[NMRguy]

What would you rather use as a launcher?

No, I agree that the Atlas V is the best option. The trajectories achieved for NH and MRO were excellent, saving valuable fuel for future scientific efforts. I also don't think that Juno is necessarily "settling" with the Atlas V choice. I was only saddened to just find out that the rocket had its first problem--I'm still catching up on lots of old news that I missed while on two months of summer fieldwork.

Anyway, Atlas V is back on track with another successful launch.

http://www.space.com/missionlaunches/sfn-0...-countdown.html

[Guest_Geographer_*]

What would you rather use as a launcher?

The Ariane 5? It's launched closer to the equator so can take advantage of more centrifugal forces than a California launch.

[djellison]

And in the real world with real money and real national interests (that rightfully keep the $190m spend on the Juno LV within the US) ?

Doug

[NMRguy]

The Juno team has added a couple of new videos to their site. They aren't anything too high-tech, but they give a visual description of the mission.

http://juno.wisc.edu/index_whatsnew.html

[nprev]

BTW, and this is all public information, of course, the launch problem previously mentioned was with the Centaur upper stage, which cut off a few seconds too early. Problem traced to a new fuel valve design; they went back to the old one for the WGS-1 launch, which went flawlessly.