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With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

arstechnica.com

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Re: With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

#41
post #34

Earlier quoted context omitted.

Sad.. Let's hope for breakthroughs on quantum entanglement research then

That still won't give us faster than light speed communication.

Yes it potentially would: https://en.wikipedia.org/wiki/Quantum_entanglement

Re: With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

#42

Earlier quoted context omitted.

That still won't give us faster than light speed communication.

Yes it potentially would: https://en.wikipedia.org/wiki/Quantum_entanglement

How do you reconcile your claim of FTL transmission with this statement directly from your link: "It is not possible, however, to use this effect to transmit classical information at faster-than-light speeds"?

Re: With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

#43
post #22

Compared to my connection Webpass with sub-1ms latencies this seems like ages. But of course not the same can be said about majority of ISPs so this is a big win.

Yeah my current options are Verizon DSL(1.5Mbps) or Comcast. During non peak hours, I can normally hit 200Mmb download/upload, but during peak hours I'm lucky to be able to stream a song or video without it lagging. I'm about 5 homes away from getting FIOS, and they recently started expanding in my area after years of zero growth, so I'm hoping I can get a single competitor to Comcast.

Re: With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

#45
Shorter summary of SpaceX's Senate testimony https://www.commerce.senate.gov/public/_cache/files/6c08b6c2...:

Initially, the SpaceX system will consist of 4,425 satellites operating in 83 orbital planes (at altitudes ranging from 1,110 km to 1,325 km). SpaceX has proposed an additional constellation of 7,500 satellites operating even closer to Earth.

For the end consumer, SpaceX user terminals—essentially, a relatively small flat panel, roughly the size of a laptop—will use phased array technologies to allow for highly directive, steered antenna beams that track the system’s low-Earth orbit satellites. In space, the satellites will communicate with each other using optical inter-satellite links, in effect creating a “mesh network” flying overhead that will enable seamless network management and continuity of service.

Later this year, SpaceX will begin the process of testing the satellites themselves, launching one prototype before the end of the year and another during the early months of 2018. Following successful demonstration of the technology, SpaceX intends to begin the operational satellite launch campaign in 2019. The remaining satellites in the constellation will be launched in phases through 2024, when the system will reach full capacity.

Re: With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

#47

Earlier quoted context omitted.

Yes it potentially would: https://en.wikipedia.org/wiki/Quantum_entanglement

How do you reconcile your claim of FTL transmission with this statement directly from your link: "It is not possible, however, to use this effect to transmit classical information at faster-than-light speeds"?

The speed of transmission of Quantum entanglement would, I believe, be limited by the speed of light between the two points in space, without having to traverse a path that follows the curve of the surface of the earth.

So, communicating from Australia to Norway would traverse the diameter of the earth, rather than half of the circumference (plus satellites of course)

Re: With latency as low as 25ms, SpaceX to launch broadband satellites in 2019

#50
post #47

Earlier quoted context omitted.

How do you reconcile your claim of FTL transmission with this statement directly from your link: "It is not possible, however, to use this effect to transmit classical information at faster-than-light speeds"?

The speed of transmission of Quantum entanglement would, I believe, be limited by the speed of light between the two points in space, without having to traverse a path that follows the curve of the surface of the earth. So, communicating from Australia to Norway would traverse the diameter of the earth, rather than half of the circumference (plus satellites of course)

I don't think that it can be used to transmit information at all, but rather to establish a shared state. The key is that you can't influence the state in a way that transmits information.

It's like sharing the same random oracle, you could use it to encrypt stuff, but sharing the same random bits with another party doesn't actually let you send information

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