<div dir="ltr">un articulo que habla sobre la transmisión de datos sobre una linea laser, en lugar de usar ondas radio. y explica de los problemas de la transmisión radio, wifi, etc.<div><br></div><div>pregunta:</div><div>
esta es la NASA. hay alguna posibilidad de reproducir una tecnología similar "de garage"/ de cacharreo a escala mas pequeña y mas barata, con el fin de conexiones rapidas? O es pura ilusión. :)</div><div><br><br>
<div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Resilient Communities</b> <span dir="ltr"><<a href="mailto:admin@resilientcommunities.com">admin@resilientcommunities.com</a>></span><br>
Date: 2013/10/15<br>Subject: How the Latest NASA Launch Can Change Communication<br>To: <a href="mailto:holon.earth@gmail.com">holon.earth@gmail.com</a><br><br><br>
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<span style="font-family:georgia">How the Latest NASA Mission Can Change
Communication
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<font size="3"> </font><font size="3"> </font><font size="3">
<br>
Last month, NASA launched the Lunar Atmosphere and Dust Environment Explorer
(LADEE). The mission included a prototype to test long range laser
communications protocols between the moon and the Earth with results
anticipated to be approximately 3000 times faster than traditional radio
communication technologies.</font>
<p>
<font size="3">The radio technology used today is not much more advanced than
what was used during the Apollo missions of the 1960’s. The LADEE
mission hopes to break this cycle by introducing new technology capable of
revolutionizing communications both in space and here on the ground.</font>
</p>
<p>
<font size="3">LADEE was scheduled to reach a lunar orbit on October 6th.
Unfortunately, the government shutdown has made finding information about the
mission nearly impossible. The LADEE mission homepage greets visitors
with a canned message about the federal budget; yet another unfortunate side
effect of the government’s inability to put citizens first.</font>
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<p>
<font size="3">The mission brings with it the promise of high-speed data
transmission – as much as 200 Gbps. Better yet, the technology uses
approximately 25% less power than current radio technology. Cloud cover can
impede this type of data transfer, however, LADEE has redundant ground stations
throughout the country meaning weather conditions are unlikely to affect the
system.</font>
</p>
<p>
<font size="3">For comparison’s sake, let’s take a look at current
radio technology and some of its limitations as a communications tool.</font>
</p>
<h2>
Current Radio Communications Systems
</h2>
<p>
<font size="3">Most modern communications systems rely on radio waves for
transmission. Even in communities where fiber optic transmission lines
are the norm, the end-user typically relies on radio waves in the form of
Wi-Fi.</font>
</p>
<p>
<font size="3">Although there have been significant advancements in Wi-Fi
technology in recent years, there are quite a few limitations that are
beginning to manifest themselves as our need for information continues to
grow.</font>
</p>
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<p>
<font size="3">In general, radio technology is:</font>
</p>
<p>
<font size="3"><b>Slow</b> – Compared to the laser technology promised by
LADEE, radio waves cannot compete in terms of speed. As we continually
rely on more data-intensive applications, speed is becoming even more important
than it has been in the past.</font>
</p>
<p>
<font size="3"><b>Capacity</b> – Many experts have stated that current
radio technology is already at capacity. In other words, we are
consistently exceeded the bandwidth allotted by these systems and growth from
this point forward is marginal at best.</font>
</p>
<p>
<font size="3"><b>Security Concerns</b> – Wi-Fi and other radio based
signals are easily jammed or intercepted. Online fraud and identity theft
are at an all-time high. Much of this crime can be attributed to
compromised wireless networks. For example, the massive TJX credit card
theft a few years ago was accomplished when hackers gained access to an
unsecured Wi-Fi network at a retail location.</font>
</p>
<p>
<font size="3"><b>Damage</b> – In 2008, most of the Middle East and India
lost all Internet access after trans-Atlantic fiber lines were severed.
The current infrastructure is susceptible to damage from natural disasters,
terrorist attacks, and hardware failure.</font>
</p>
<p>
<font size="3"><b>Signal Degradation</b> – Radio communications degrade
quickly across relatively short distances. The technology being tested by
NASA allows for communications across vast distances quickly and
reliably.</font>
</p>
<p>
<font size="3">Right now, approximately three billion people do not have access
to Internet service. LADEE could bring global connectivity to these
communities quickly and easily.</font>
</p>
<h2>
Your Daily Life
</h2>
<p>
<font size="3">How will this technology change your life? Simply speaking,
it’s the next wave of internet connections.</font>
</p>
<p>
<font size="3">Laser cables are already being used by internet providers, but
this will move the same light transmissions over the air. It creates an endless
number of high-speed uses and applications.</font>
</p>
<p>
<font size="3">Remember, leveraging proper technology is the key to becoming
independent. Right now, there are approximately three billion people we cannot
communicate with easily. Is it safe to say we could probably learn a
thing or two about resiliency from these communities? A new gardening
technique? Better food preservation methods?</font>
</p>
<p>
<font size="3">The possibilities are endless.</font>
</p>
<p>
<font size="3">Faster, more reliable connections with more people around the
world means we can work together more easily. Even existing lines of
communication are improved as information transmission methods improve.
Collaboration becomes a convenient reality</font>
</p>
<p>
<font size="3">The LADEE technology is capable of transmitting so much data
simultaneously that it would be the equivalent of 100 HD television
shows. Think of how much more data could be shared with like-minded
individuals around the world?</font>
</p>
<p>
<font size="3">Right now, O3B (the Other 3 billion), a global
telecommunications company, is working to supply reliable communication to many
communities without Internet access. Current initiatives rely on radio
technology but the company is already looking at alternatives thanks to the
research being done by NASA and the LADEE mission team.</font>
</p>
<p>
<font size="3">Other companies are also looking at this mission as a glimpse
into the future of radio telecommunications. Whether LADEE is a success
or not, it’s clear that the demand for improved communications standards
is increasing.</font>
</p>
<p>
<font size="3">Although we cannot depend on technology like this forever, we
are well-served to leverage it when possible to further our knowledge and
simultaneously lessen our dependence on a failing system.</font>
</p>
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