Gizmorama
April 14, 2010
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Good Morning,
A specialized robotic airplane, called Global Hawk, has
completed its first flight over the Pacific Ocean. Read all
about this plane's impressive capabilities and the details
on its mission in the last article.
Until Next Time,
Erin
Questions? Comments? Email me at: mailto:gizmo@gophercentral.com
Email your comments=
P.S. You can discuss this issue or any other topic in the new
Gizmorama forum. Check it out here...
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Grid proposed for offshore wind turbines
NEWARK, Del. - U.S. scientists are proposing creation of a
grid project to allow offshore wind turbines to generate
steady power despite changes in wind speed and direction.
The researchers from the University of Delaware and Stony
Brook University said offshore wind power resources are
abundant, but wind turbines are currently unable to provide
steady power due to natural fluctuations in wind direction
and strength. The researchers, however, have determined the
power output can be made more consistent by choosing project
development locations that take advantage of regional weather
patterns and by connecting wind power generators with a
shared power line. "Making wind-generated electricity more
steady will enable wind power to become a much larger frac-
tion of our electric sources," said University of Delaware
Professor Willett Kempton, the study's lead author. Reducing
the severity of wind power fluctuations would allow suffic-
ient time for power suppliers to ramp up or down power pro-
duction from other energy sources as needed, the scientists
said. Solutions that reduce power fluctuations also are im-
portant if wind is to displace significant amounts of carbon-
emitting energy sources, the researchers said. The study
that included University of Delaware researcher Dana Veron
and Stony Brook University Associate Professor Brian Colle
is reported in the Proceedings of the National Academy of
Sciences.
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Asteroid to pass Earth within moon's orbit
PASADENA, Calif. - U.S. astronomers say a newly discovered
asteroid will travel close to Earth Thursday, passing the
planet at a distance of about 223,000 miles. The U.S. space
agency said the asteroid -- named 2010 GA6 -- is approxi-
mately 71 feet wide and will fly-by Earth within the moon's
orbit. It was discovered by the University of Arizona's
Catalina Sky Survey, a Tucson astronomical survey focused
on the discovery and study of near Earth asteroids and com-
ets. "Fly-bys of near-Earth objects within the moon's orbit
occur every few weeks," said Don Yeomans of NASA's Near-Earth
Object Office at the Jet Propulsion Laboratory in Pasadena,
Calif. He said the asteroid poses no danger to the planet.
NASA detects and tracks asteroids and comets passing close
to Earth using both ground and space-based telescopes. The
Near-Earth Object Observations Program, commonly called
"Spaceguard," plots the objects' orbits to determine if any
could be potentially hazardous to our planet. JPL manages
the Near-Earth Object Program for NASA's Science Mission
Directorate.
NASA satellites monitor Icelandic volcano
PASADENA, Calif. - U.S. space agency scientists say they are
closely monitoring the eruption of the Eyjafjallajokull vol-
cano in Iceland that was first detected by satellites. NASA
scientists said they are using the latest advances in satel-
lite artificial intelligence to speed up estimates of the
heat and volume of lava escaping from the volcano. The erup-
tion began March 20. Less than 24 hours after the satellites'
first observation, scientists at NASA's Jet Propulsion Lab-
oratory in Pasadena, Calif., said they were able to confirm
the volcano was emitting more than one billion watts of
energy -- enough to power 40,000 passenger cars at the same
time -- and discharging more than six tons of lava per sec-
ond. Scientists said the rapid calculations of lava volume
and location provided by new satellite "onboard autonomy"
technology can help determine the likely direction of lava
flows, while giving emergency managers advance warning to
plan and deploy resources and carry out evacuations. "There
is concern that this eruption might precede another larger
eruption at the Katla volcano nearby," said Ashley Davies,
lead scientist for NASA's New Millennium Program-Space Tech-
nology 6 Autonomous Sciencecraft Experiment. "If it does, we
will be poised to provide imaging data of activity as the
eruption evolves."
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Global Hawk completes first science flight
GREENBELT, Md. - The U.S. space agency says its unpiloted
aircraft called Global Hawk has successfully completed its
first science flight over the Pacific Ocean. NASA said the
flight was the first of five scheduled for the Pacific, or
GloPac, mission to study atmospheric science over the
Pacific and Arctic oceans. "The Global Hawk is a robotic
plane that can fly autonomously to altitudes above 60,000
feet -- roughly twice as high as a commercial airliner --
and as far as 11,000 nautical miles, which is half the
circumference of Earth," NASA said. "Operators pre-program
a flight path, then the plane flies itself for as long as 30
hours, staying in contact through satellite and line-of-site
communications links to a ground control station at NASA's
Dryden Flight Research Center in California's Mojave Desert."
The co-mission scientist for GloPac Paul Newman at NASA's
Goddard Space Flight Center in Greenbelt, Md., said the
Global Hawk is a revolutionary aircraft. "No other science
platform provides the range and time to sample rapidly
evolving atmospheric phenomena," Newman said. "This mission
is our first opportunity to demonstrate the unique capabil-
ities of this plane, while gathering atmospheric data in a
region that is poorly sampled." The plane carries 11 instru-
ments to sample the chemical composition of the troposphere
and stratosphere. The mission is a joint project with the
National Oceanic and Atmospheric Administration.
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