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Re: Record data rate?
prabhakar_deosthali   5/18/2014 3:43:00 AM
May be True.  Whay was that technology not used later? otherwiase we could have achieved much better speeds in the last 30 years .




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JanineLove   5/14/2014 5:00:09 PM
Thanks for following this George! I was keeping tabs on the LADEE mission last October and was able to talk to the Mission Manager about it http://www.edn.com/electronics-blogs/catching-waves/4420968/NASA-tests-optical-links-from-space. Glad to see things are moving along.

Max The Magnificent
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Re: The Internet: Greatest Invention of the Last Century
Max The Magnificent   5/14/2014 4:18:37 PM
@BobsView: I am just saying we should get the best minds on this now...

This is a laudable sentiment ... unfortunately I'm a tad busy right now -- maybe later... LOL

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Re: Lets Get Terrestrial Internet Finished First
mithrandir   5/11/2014 11:45:59 PM
Ah the ever present spambot, sprucing conversations up everywhere...

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Record data rate?
AZskibum   5/11/2014 9:37:05 PM
622 Mbps is impressive for a spaceborne data link, but I don't believe this was a new record set in October 2013. The NASA ACTS satellite, designed in the late 1980s and launched in the early 1990s had a maximum user data rate of 622 Mbps.

David Ashton
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Optical comms
David Ashton   5/11/2014 4:17:18 PM
Let hope they do better than one bright manager at my employer.  He set up a high speed optical link between tow buildings.  It worked great until one winter morning when there was a heavy fog.  That's why he was a manager I guess :-)

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Let NASA not worry about the earth!
prabhakar_deosthali   5/10/2014 1:53:06 AM
Yes! There is a need to have a global reach high speed internet on earth first.

But let NASA not worry about it. Let them fly to outer space and establish such technologies . NASA is definitely aiming for the future colonies in space where such interplanetary internet would become a handy communication medium.

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Re: The Internet: Greatest Invention of the Last Century
Bert22306   5/9/2014 7:05:43 PM
There already is a way to get broadband to homes in the boondocks, though. You can do it with satellite, and it's commercially available already. My long-time colleague at work retired to Western Pennsylvania where that was his only option.

The main problem with satellite broadband is latency. But it does work and can be used in low population density settings.

There are also many wireless ISPs available in parts of the country.

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All I Can Say is... WOW!
BobsView   5/9/2014 5:46:59 PM
I just watched the video on Max's Cool Beans about Net Neutrality.  All I can say is WOW!

I don't know how I missed it before.

If you haven't seen it, I highly recommend it.  

I've been looking for a good analogy, and this commentator hits it dead on.

The topic is much bigger than we ever imagined...


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Re: The Internet: Greatest Invention of the Last Century
junko.yoshida   5/9/2014 5:20:14 PM
I just talked to George Leopold, the author of this story. Here's what he responded: 

The Interplanetary Networking SIG is also looking for way to use space communications to boost the bandwidth of the terrestrial Internet.

There you have it. The earth is not ignored.

Page 1 / 2   >   >>

As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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