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ibm221
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re: Dragon cargo ship, space station fly in formation
ibm221   5/28/2012 2:38:50 AM
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If US govt truely want to save cost, next step is outsource this whole deal to chinese. I bet 1k RMB/pound will be there.

george.leopold
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re: Dragon cargo ship, space station fly in formation
george.leopold   5/25/2012 2:09:22 PM
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Capture at 9:56 a.m. EDT over Australia! Space Station Flight engineer Don Pettit joked that it was a pretty easy sim and that he was ready to do it for real! It is truly remarkable that SpaceX and NASA pulled this off on the first try.

george.leopold
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re: Dragon cargo ship, space station fly in formation
george.leopold   5/25/2012 1:32:39 PM
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The technology involved here is hardly state of the art. The Merlin main engines are based on a NASA design from the 1980s called Fastrac. NASA wasn't using that engine design, so it makes little sense to sit on it. What you miss here is that SpaceX is bringing a new way of doing business to space exploration. Launch costs were $10K/pound with the shuttle. That's unsustainable. If NASA can seed a commercial industry that can get launch costs down to $1K/pound, then you have a business. The larger question is how do you improve the key metric for rocket technology: specific impulse. Such an improvement represents the kind of valuable IP you keep bringing up.

george.leopold
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re: Dragon cargo ship, space station fly in formation
george.leopold   5/25/2012 12:20:46 PM
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Dragon is live from the International Space Station on NASA TV: http://www.nasa.gov/multimedia/nasatv/index.html

ibm221
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re: Dragon cargo ship, space station fly in formation
ibm221   5/25/2012 5:28:48 AM
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NASA did a damn good job of transfering US IPs to spaceX here !!! for Free? Can you imagine Elon Co. did all this from scratch? I bet their logo is self developed, how about all the control, engine, connection... NASA got to open it's door and let Elon pick whatever it want ...

george.leopold
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re: Dragon cargo ship, space station fly in formation
george.leopold   5/24/2012 9:28:33 PM
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I was thinking something more like this: http://www.youtube.com/watch?v=cWnmCu3U09w

Rockheart
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re: Dragon cargo ship, space station fly in formation
Rockheart   5/24/2012 7:31:28 PM
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go Dragon!!!!!!! http://youtu.be/JlDnevvKud0

mcgrathdylan
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re: Dragon cargo ship, space station fly in formation
mcgrathdylan   5/24/2012 6:56:52 PM
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I bet the 20-hour "fly under" feels a lot longer than that to the crew. Go Dragon.



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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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