Glen sensibly writes,
> > When so much is connected to the Internet, why is the aerospace
> > industry using technology that predates fax machines to look for
> > flash drives in the sea?
>
> That is to focus on the device rather than on the system. For sure
> planes could send data continuously. But just consider the systems
> integration aspects of that ...
Yes, the problem starts not with planes, but with the satellites that track
them.
While technology for communicating from the ground has advanced rapidly in the
last 40 years, technology for communicating from the sky has been stuck in the
1970s.
The Sentinel-1A satellite, for example, can only store the same amount of data
as seven iPhones. When was this relic from the age of mainframe computers sent
into orbit? On April 3. Huge, expensive, rocket-launched satellites with little
computing power may make sense for broadcasting, where one satellite sends one
signal to lots of things (such as television sets) but they are generally too
expensive and not intelligent enough to be part of the Internet, where lots of
things (such as airplanes) would send lots of signals to one satellite.
This is why most satellites only reflect TV signals, take pictures of the
Earth, or send the signals that drive GPS systems.
It is also the reason airplanes can’t stream flight and location data like they
stream vapor trails: cellphone and Wi-Fi signals don’t reach the ground from
30,000 feet, so airplanes need to be able to send information to satellites —
satellites that, as well as being unable to handle network data economically,
are also designed to talk to rotating, dish-shaped antennas that would be
impossible to retrofit to airplanes.
The solution to these problems is simple: We need new satellite technology. And
it’s arriving.
Wealthy private investors and brilliant young engineers are dragging satellites
into the 21st century with inventions including “flocks” of “nanosatellites”
that weigh as little as three pounds; flat, thin antennas built from advanced
substances called “metamaterials”; and “beamforming,” which steers radio
signals using software.
On Jan. 9, a San Francisco-based start-up called Planet Labs sent a flock of 28
nanosatellites into space. The first application for this type of technology is
taking pictures of the Earth, but it could also be used to receive data
streaming from aircraft retrofitted with those new, flat “metamaterial”
antennas. There are many other possible systems. Dozens of new satellite
technologies are emerging, with countless ways to combine them.
Streaming data from planes is about to become cheap and easy.
The satellite revolution is not just about airplanes. David Cowan, a venture
capitalist who is on the board of Skybox Imaging, a manufacturer of 220-pound
“microsatellites,” calls the big picture “planetary awareness.” Combining data
from sensors on satellite networks with information from things like phones,
cars and planes will give us a comprehensive, constantly updating picture of
the world. Everybody will be able to see everything from crops growing to
traffic jamming to armies invading to icecaps melting.
Vanishing airplanes will be a thing of the past.
Today’s big aerospace companies may not embrace this revolution unprompted.
Seeing satellites as network computers and airplanes as nodes that communicate
with them requires a new mind-set.
Airlines, airplane makers and regulators are feeling perplexed and defensive
about the public outcry over their inability to know where their planes are and
whether something is wrong with them.
One industry insider told me, “There’s no cost-effective justification for
streaming data from aircraft. What would you do if you had the information?”
One of the many things you would do: You would never again put the families of
239 people though an agony of uncertainty as you searched for an airplane that
flew itself for hours until it ran out of gas and crashed into the sea.
Ref:
http://www.nytimes.com/2014/04/29/opinion/finding-a-flash-drive-in-the-sea.html?
--
Cheers,
Stephen.
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