|
Posted by BradGuth on October 14, 2007, 7:10 pm
Please log in for more thread options On Oct 14, 12:05 pm, "Dr.Colon.Osc...@gmail.com"
>
>
>
>
>
> > On Oct 9, 12:21 pm, baa...@earthlink.net wrote:
>
> > > Oct. 9, 2007
>
> > > Dwayne Brown
> > > Headquarters, Washington
> > > 202-358-1726
> > > dwayne.c.br...@nasa.gov
>
> > > Michael Buckley
> > > Johns Hopkins University Applied Physics Laboratory, Laurel, Md.
> > > 240-228-7536
> > > michael.buck...@jhuapl.edu
>
> > > RELEASE: 07-221
>
> > > NASA SPACECRAFT SEES CHANGES IN JUPITER SYSTEM
>
> > > LAUREL, Md. - NASA's New Horizons spacecraft provided a new bird's-
> > > eye
> > > view of the dynamic Jupiter system as it traveled through the
> > > planet's orbit on Feb. 28.
>
> > > New Horizons used Jupiter's gravity to boost its speed and shave
> > > three
> > > years off its trip to Pluto. Although the eighth spacecraft to visit
> > > Jupiter, New Horizons' combination of trajectory, timing and
> > > technology allowed it to explore details never before observed.
>
> > > The spacecraft revealed lightning near the Jupiter's poles, the life
> > > cycle of fresh ammonia clouds, boulder-size clumps speeding through
> > > the planet's faint rings, the structure inside volcanic eruptions on
> > > its moon Io, and the path of charged particles traversing the
> > > previously unexplored length of the planet's long, magnetic tail.
>
> > > "The Jupiter encounter was successful beyond our wildest dreams,"
> > > said
> > > Alan Stern, principal investigator for the New Horizons mission, NASA
> > > Headquarters, Washington. "Not only did it prove our spacecraft and
> > > put it on course to reach Pluto in 2015, it was a chance for us to
> > > take sophisticated instruments to places in the Jovian system where
> > > other spacecraft could not go. It returned important data that adds
> > > tremendously to our understanding of the solar system's largest
> > > planet and its moons, rings and atmosphere."
>
> > > The New Horizons team presented its latest, most detailed analyses of
> > > those data Tuesday at the American Astronomical Society's Division
> > > for Planetary Sciences meeting in Orlando, Fla. Results also will
> > > appear in a special section of the Oct. 12 issue of the journal
> > > Science.
>
> > > >From January through June, New Horizons' seven science instruments
>
> > > made more than 700 separate observations of the Jovian system.
> > > Jupiter's weather was high on the list, as New Horizons' visible
> > > light, infrared and ultraviolet remote-sensing instruments probed the
> > > planet's atmosphere for data on cloud structure and composition.
>
> > > Instruments saw clouds form from ammonia welling up from the lower
> > > atmosphere. Heat-induced lighting strikes in the polar regions also
> > > were observed. This was the first polar lighting ever seen beyond
> > > Earth, demonstrating that heat moves through water clouds at
> > > virtually all latitudes across Jupiter.
>
> > > New Horizons made the most-detailed size and speed measurements yet
> > > of
> > > "waves" that run the width of the planet and indicate violent storm
> > > activity below. Additionally, New Horizons snapped the first close-up
> > > images of the Little Red Spot, gathering new information on storm
> > > dynamics. The spot is a nascent storm about half the size of
> > > Jupiter's larger Great Red Spot, or about 70 percent of Earth's
> > > diameter.
>
> > > The spacecraft captured the clearest images to date of the tenuous
> > > Jovian ring system, showing clumps of debris that may indicate a
> > > recent impact inside the rings or some more exotic phenomenon. Movies
> > > made from New Horizons images offer an unprecedented look at ring
> > > dynamics, showing the tiny inner moons Metis and Adrastea shepherding
> > > the materials around the rings. A search for smaller moons inside the
> > > rings, and possible new sources of the dusty material, found no
> > > bodies wider than a mile.
>
> > > The mission's investigations of Jupiter's four largest moons focused
> > > on Io, the closest to Jupiter, which has active volcanoes that blast
> > > tons of material into the Jovian magnetosphere and beyond. New
> > > Horizons spied 11 different volcanic plumes of varying size, three of
> > > which were seen for the first time. One, a spectacular 200-mile-high
> > > eruption rising above the volcano Tvashtar, provided a unique
> > > opportunity to trace plume structure and motion. New Horizons' global
> > > map of Io's surface confirms the moon's status as the solar system's
> > > most active body, showing more than 20 geological changes since the
> > > Galileo Jupiter orbiter provided the last close-up look in 2001.
>
> > > New Horizons' flight down Jupiter's magnetic tail offered a look at
> > > the vast region dominated by the planet's strong magnetic field.
> > > Specifically observing the fluxes of charged particles that flow
> > > hundreds of millions of miles beyond the giant planet, spacecraft
> > > particle detectors saw evidence that tons of material from Io's
> > > volcanoes move down the tail in large, dense, slow-moving blobs.
>
> > > Designed, built and operated by the Johns Hopkins University Applied
> > > Physics Laboratory, Laurel, Md., New Horizons lifted off in January
> > > 2006. The fastest spacecraft ever launched, it reached Jupiter in
> > > just 13 months. New Horizons is now approximately halfway between the
> > > orbits of Jupiter and Saturn, more than 743 million miles from Earth.
> > > It will fly past Pluto and its moons in July 2015, then head deeper
> > > into the Kuiper belt of icy, rocky objects on the planetary frontier.
> > > New Horizons is the first mission in NASA's New Frontiers Program of
> > > medium-class spacecraft exploration projects.
>
> > > For more details on the findings, visit:
>
> > >http://www.nasa.gov/newhorizons
>
> > > -end-
>
> > Do tell, as to why Jupiter and Io got depicted as so unusually
> > pastel? and where the heck are those pesky
stars?http://www.nasa.gov/images/content/192016main_100907_11.jpg
> > Jupiter isn't exactly getting well enough illuminated, nor is it all
> > that albedo/reflective, and that onboard camera of such nifty CCD
> > performance image processing being worth 16+db and having nothing but
> > the very best available optics isn't exactly wussy in the dynamic
> > range(DR) department. As for imaging the likes of Pluto will demand a
> > great deal of such CCD dynamic range, and most certainly that onboard
> > camera and terrific optics are in fact well suited for that task.
>
> > However, just like Messenger's absolutely piss poor image of Earth and
> > apparent inability to record our physically dark moon, the New Horizon
> > CCD image of Jupiter and Io had been extremely DR limited, as to
> > offering not much better or even as good of DR than my free cell-phone
> > camera could provide (certainly far worse off than Kodak film). Why
> > would they only utilize 1% or less of their CCD Dynamic Range?
>
> > Do you think JAXA's Senene CCD images are going to be as intentionally
> > DR limited?
>
> > Kodak KAI-1003 has a DR of 70 DB
> > Kodak KAI-2020 has a DR of 68 DB
> > Kodak KAI-4011 has a DR of 60 DB
> > Fairchield's Condor CCD486 or CCD3041 are only that much better yet,
> > along with most of such cameras processing out any given 16 bit or 16
> > DB worth of that CCD's extended DR, means that it should be next to
> > impossible as to exclude stars unless having intentionally done so via
> > the firmware or subsequent software instructions. Of any given FOV or
> > composite image that offers the likes of Earth and our moon side by
> > side, under identical illumination and using the very same exposure
> > scan is less than child's play for this generation of impressive
> > instruments, and anything Kodak or Fairchield can muster is certianly
> > matched or surpassed by whatever Sony, Fuji or others are capable of
> > doing.
> > - Brad Guth -- Hide quoted text -
>
> > - Show quoted text -
>
> "Why Jupiter and Io are so unusually pastel?" is just your
> observation, which certianly is not science. The photo is a montage
> done in the near infrared see for
detailshttp://www.nasa.gov/mission_pages/newhorizons/news/nh_jupiter_oct09.html
> but at least you got the planets correct and that represents some good
> headway on your part good good.......Doc- Hide quoted text -
>
> - Show quoted text -
In other words, you're still a born-again liar and a Semitic Third
Reich wizard (aka pretend atheist to boot) all the way and then some,
playing word games and/or pretending you don't get the drift of my
rant.
BTW, near IR of such terrific DR should also have indicated a few
stars. Just because a given CCD spectrum range happens to include the
near IR doesn't in of itself automatically exclude the visible
spectrum unless it's intentionally getting filtered out, and why
otherwise bother to filter out the vast bulk of the visual spectrum,
especially as of way the hell and gone out there?
CCD's with a 64+ DB worth of dynamic range are becoming common place
in such spendy missions. So, where the heck are those pesky stars or
even a few other planets?
- Brad Guth -
| 
XML Sitemap