Live data from Hacker News

Starlink's laser system is beaming 42 petabytes of data per day

pcmag.com

331–340 of 469 posts

Re: Starlink's laser system is beaming 42 petabytes of data per day

#331

Earlier quoted context omitted.

Who has 4-5 hrs a day to watch television? ..or am I completely out of touch?

_actively_ watch? Probably not many. Having it on as background noise however? 5 hours is pretty easy

Is that still a thing with young people? I associate leaving the TV on in the background as an older generation thing.

Re: Starlink's laser system is beaming 42 petabytes of data per day

#332
post #194

Earlier quoted context omitted.

I use starlink, it works pretty well, as good as cable. Not garbage. I've ridden in Teslas. Some likes, but holy shit that drivetrain. Not garbage. You however, have been consuming garbage media. Hint: if every other day (ahem Gawker sites) there is an outrageous anti-Musk headline or "crazy thing Musk said" headline, your media source is total garbage. Is he a "good guy"? No. Is he "the worse thing ever?" No. What d…

Agree to disagree I guess. The fact that it's his project makes it uninteresting even if the tech would have been alright in the hands of someone less harmful. If you aren't catching things like his signal boosting of literal nazis on Twitter, your media sources are garbage. (Also is Gawker even still a thing?)

on one hand

- Tesla kicked off one of the two pillars of dealing with climate change: EVs to eliminate as much carbon emissions from transportation as possible

on the other hand

- mean tweets

... yes there is a lot of hard work by other people involved in #1, but Musk's leadership was a major contributor. Let me ask you a question. Rank the most evil CEOs in the world. If you have musk over petroleum companies, mining executives, military contractors, gun manufacturers, internet companies hoovering your data for the government, financial wizards defrauding people for short term gain, etc, then I'm sorry, you don't know anything about the world. Oops, I forgot purdue pharma and other opioid producers, chemicals and industrialists that dump and poison the environment, surveillance and security companies enabling despots (and the US government), I mean, I could go on.

Re: Starlink's laser system is beaming 42 petabytes of data per day

#333

Earlier quoted context omitted.

The huge size of the network is itself a risk. Kessler syndrome is something everyone is currently trying to avoid, but if you wanted to intentionally induce it you could just start launching giant payloads of tiny ball bearings into their orbits, or take down enough of them that the shrapnel becomes equivalent to that anyway. Starlink is low enough that the debris from even a full Kessler syndrome cascade will deorb…

This is something commonly misunderstood. Kessler syndrome is a statistical process that happens over many years. It is not a sudden cascade like is seen in movies like Gravity. Statistical processes are not what militaries are interested in. It's actually thought that Kessler syndrome is kind of already happening right now, which is why there's a lot of push right now to try to de-orbit the very large pieces of debr…

It happens as fast as it happens. Any actual projection would depend on the specific orbits, masses, volumes, materials, and numbers of satellites - Starlink's orbits have a lot of satellites now. There's a very big difference between "everyone trying to avoid it" and "one of the world's largest space programs trying to cause it" in terms of how much we should be worried about it happening for any given orbit in the near term.

The reason it's a scary outcome is because it's an exponential. It can look like an isolated incident or incidents, then the next day be not practically stoppable.

Re: Starlink's laser system is beaming 42 petabytes of data per day

#334

Earlier quoted context omitted.

_actively_ watch? Probably not many. Having it on as background noise however? 5 hours is pretty easy

Is that still a thing with young people? I associate leaving the TV on in the background as an older generation thing.

I'm middle aged. This kind of background noise sounds terrible to me.

Maybe I just grew up in a quiet place.

Re: Starlink's laser system is beaming 42 petabytes of data per day

#335
post #225

So that is "432 Mbit/s per laser, and 9000 lasers total". I don't know you guys but I find that statement much more relatable than "42 PB/day". Interestingly, they also say each laser "can sustain a 100Gbps connection per link" (although another part of the article even claims 200 Gbit/s). That means each laser is grossly underused on average, at 0.432% of its maximum capacity. Which makes sense since 100 Gbit/s is p…

That means each laser is grossly underused on average, at 0.432% of its maximum capacity. Which makes sense since 100 Gbit/s is probably achievable in ideal situations (eg. 2 satellites very close to each other), so these laser links are used in bursts and the link stays established only for a few tens of seconds or minutes, until the satellites move away and no longer are within line of sight of each other.

I think I agree that each laser is grossly underused on average, but if you read the article, there's quotes about the uptime of these links. They're definitely not just "used in bursts [of] a few tens of seconds or minutes".

Re: Starlink's laser system is beaming 42 petabytes of data per day

#337

Earlier quoted context omitted.

Netflix uses 3-7GB an hour. The average person is spending 4-5hrs a day watching TV. I’d say most are above 100GB/month. But that’s me.

Who has 4-5 hrs a day to watch television? ..or am I completely out of touch?

According to historical Nielsen data[1] from 1991 to 2009: most Americans.

Even back to 1950, for per household data, it was above 4 hours.

[1] https://www.nielsen.com/insights/2009/average-tv-viewing-for...

Re: Starlink's laser system is beaming 42 petabytes of data per day

#338

Earlier quoted context omitted.

Real time video and telemetry for military drones that’s nearly immune to electronic warfare counter measures is the real end game. The fpv drone carnage in Ukraine is currently limited to the contact lines plus or minus a few kilometers. Satellite comms change that drastically. Yes it’s available now but highly restricted.

But not immune to missiles. Russia's already threatened to target Starlink satellites. Maybe they're bluffing, or not, but it does offer a reminder that these are just floating computers in the sky.

Missiles are expensive compared to tiny, cheap satellites.

Laser beams are also the replacement for ASAT.

Re: Starlink's laser system is beaming 42 petabytes of data per day

#339
post #232

In the long run that could become a massive strategic advantage for the US. A 2nd layer of resilience over undersea cables

A strategic advantage depending on the whims of a single provate company.

Sounds great, what could possibly go wrong?

Re: Starlink's laser system is beaming 42 petabytes of data per day

#340

Earlier quoted context omitted.

Not really unless you're using 1 GB flash drives from fifteen years ago. 256 GB is now common, which would make that petabyte less than 1 football field. (It's only 4096 such drives.)

...how large is a football field? is it supposed to be actual football one or the field for handegg?

American Gridiron football, though Rugby League and Rugby Union (two other forms of football) use similar length fields/pitches. An Association Football pitch is almost always longer than a Gridiron field, depending on how you measure (it is typical to exclude the end-zones when measuring a Gridiron field, and while Rugby and Gridiron football have a playable area behind the goal (or try) line, Association Football does not.

As a side-note Canadian Gridiron football uses a longer field than American Gridiron football, though (measuring between the goal lines) still slightly shorter than a typical Association Football pitch.

Australian Rules Football is on a field typically longer even than an Association Football pitch, though I don't believe there is a regulation limiting the size.

Post reply on HN