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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

#51

Post by drmpeg »

oh_sigh wrote: post #29
dharma1 wrote: post #15

Earlier quoted context omitted.

Yes, until some of the thousands of small satellites about to be launched (not just by SpaceX) star breaking down and creating space junk that will become a serious problem to the launch of new satellites and spacecraft http://www.telegraph.co.uk/news/2017/04/20/mega-constellatio...

The SpaceX sats at least are planned to be in very LEO. Their orbit will degrade very quickly if left to their own devices. Heck, that might even be the plan. If sats are cheap enough to launch and produce, then each sat can crash into earth after say 2 years.

1,110km to 1,325km is actually a fairly high orbit. Estimated lifetime is 1000 years.

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

#52

Post by tehwhynot »

Do the same thing on Mars. Then get self-driving space internet machines that transfer internet from here to Mars. They always position themselves to be between here and Mars for best RTT. Thank me later, humanity.

And yeah, I know latency would be between 6 and ~45 minutes.

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

#53

Post by teraflop »

bostonvaulter2 wrote: post #41
maxthegeek1 wrote: post #37

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

This page is more relevant: https://en.wikipedia.org/wiki/No-communication_theorem

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

#54

Post by ChuckMcM »

Neat, TeleDesic[1] V2.0 (or is it 3.0?) :). That effort stalled when single stage to orbit rockets became impractical due to insufficent launch demand when Regan's StarWars program was cancelled.

With a fast turn around re-usable F9 booster (so its relaunch costs are significantly less than launching a new one) Musk would have control over his destiny in this case. When Iridium was being built the whole ground station thing (up/down links into the switched telephone network) was nearly a decade slog of permission, licenses, and regulations.

That said, if he is successful he will suck a lot of money out of wallets that belong to some pretty big fat cats companies. And if he made every ground station a Tor exit node it would really mess with the powers that be.

[1] https://en.wikipedia.org/wiki/Teledesic

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

#55

Post by Klathmon »

dharma1 wrote: post #15
mattcoles wrote: post #6

Do we have space in orbit for this? This is a lot of satellites and I also don't get how the latency can be so much lower than current satellite ISPs?

Yes, until some of the thousands of small satellites about to be launched (not just by SpaceX) star breaking down and creating space junk that will become a serious problem to the launch of new satellites and spacecraft http://www.telegraph.co.uk/news/2017/04/20/mega-constellatio...

Well seeing as any future business in either rockets or satellite internet both depend on not creating space junk, I think they are pretty motivated to not let that happen.

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

#56

Post by slinger »

gknoy wrote: post #47
undersuit wrote: post #42

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

What if the "no-cloning theorem"[0] wasn't actually right? That would enable doing a bunch of copies of the same particle state, making it possible to predict the probability distribution of each particle. That way it would be possible to send information doing measurements[1] rather than forcing a particle state.

[0] https://en.wikipedia.org/wiki/No-cloning_theorem

[1] https://www.forbes.com/sites/chadorzel/2016/05/04/the-real-r...

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

#57

Post by mistermann »

ChuckMcM wrote: post #54

Neat, TeleDesic[1] V2.0 (or is it 3.0?) :). That effort stalled when single stage to orbit rockets became impractical due to insufficent launch demand when Regan's StarWars program was cancelled. With a fast turn around re-usable F9 booster (so its relaunch costs are significantly less than launching a new one) Musk would have control over his destiny in this case. When Iridium was being built the whole ground statio…

> it would really mess with the powers that be

I'm fairly surprised the US government is a-ok with all of this, or maybe they've already sat down and had a chit chat with Mr Musk. Or, if everyone moves to SpaceX internet service does it make no difference whatsoever to the NSA?

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

#58

Post by adolph »

_archon_ wrote: post #13
bane wrote: post #12

Earlier quoted context omitted.

They'll probably just end up turning off service over certain geographic areas.

Why would they do this? EDIT: Data customers would pay for access on an individual basis. Helicopter-parent countries might cry foul, but what leverage do they have? It's not like they were going to launch things with SpaceX and they can threaten to stop.

It would be a way to address problem of the National Radio Quiet Zone?

https://en.wikipedia.org/wiki/United_States_National_Radio_Q...

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

#59

Post by hackuser »

oceanswave wrote: post #31

Seven years. US Broadband providers have seven years to take us over the coals, practice full bore capitalism with our data and generally run oligilistic practices until their time even begins to run out

You have alternatives now; 4G cellular is one example. But they are difficult and/or expensive. We'll have to see if this solution is different; right now it's just a plan.

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

#60

Post by hackuser »

noonespecial wrote: post #18
mattcoles wrote: post #6

Do we have space in orbit for this? This is a lot of satellites and I also don't get how the latency can be so much lower than current satellite ISPs?

1) Space is huge. This is a little like asking if there's enough space left in earths oceans to float a few thousand pingpong balls. 2) Present internet satellites are all in mostly geostationary orbits that are much further away then the proposed leo's. Realistically the ones we have now introduce a whopping 650ms. This will be a huge improvement.

> Present internet satellites are all in mostly geostationary orbits that are much further away then the proposed leo

What about the LEO systems such as Iridium, etc. (I forget which is owned by whom and what their statuses are)?

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