ziplyne
James ThomsonApparently, the Artemis II has 260 Mbps internet via lasers, I guess technology has improved a little bit since the last time we were visiting the moon.
Glenn Fleishman@jamesthomson PEW PEW
@jamesthomson There has been steady and smart work over the last ~15 years (if not longer) to dramatically improve long-range throughput. Kind of astonishing the bandwidth from Mars right now! Lasers, man, they're the fuutre.
@glennf Time to get some Martians on Pants in the Boot!
@jamesthomson They only want to talk about potatoes and spreadsheets.
Timo Hetzel@jamesthomson faster than my house 🫠
James Bilsbrough@jamesthomson just hope they’ve got good DNS!
Stephen Hackett@jamesthomson better than a lot of America
@ismh86 Big laser is keeping you in the dark!
Brian Vargas@jamesthomson But you should see the ping times. Oof!
Ash Doyle@jamesthomson Fiber optic without fiber?
dmd@jamesthomson Must be some powerful and very precise lasers.
Advisory for astronauts: Please do not look directly at the internet
Khleedril@dmd @jamesthomson It is a pity the OP hasn't given us a link to source information, but I'm guessing the lasers are on satellites, so they don't pass through any atmosphere and thus don't suffer attenuation: they don't need to be all that powerful!
Craig Hockenberry@jamesthomson YEAH BUT WHERES THEIR PORN FOLDER
@chockenberry Somewhere in 1997!
Guillaume Gete
Morten@jamesthomson I think satellite internet things in low orbit also talk to each other via laser? It's nice and directional where other wavelengths has a tendency to spread in many directions.
PassengerWhitey is watching Netflix on the Moon, I guess.
Vyvyan Basterd@jamesthomson easier to get a tightbeam from Tycho Station
Mike Sax@jamesthomson Although… the latency is pretty bad and getting worse. 😁 The light in those lasers will soon have to travel for >1 second.
Curioso 🍉 🇺🇦 (jgg)I can imagine they will have some issues once the Moon gets between them and us, unless they have some kind of repeater.
@jgg @jamesthomson One or more repeaters in Moon orbit to preserve line-of-sight would be pretty awesome. I wonder if they could just be (adjustable) mirrors?
Mr. Moresco@jamesthomson I'm sure that beats my internet here on the ground.
thomasmey@jamesthomson and as the software uses npm and needs constant updates, every megabit is needed!
Pēteris Krišjānis@jamesthomson better than rural broadband
Ambient Sponge@jamesthomson Closer to the moon than Earth and yet they have internet that's way way faster than mine.
Graham Ballantyne
Jeff Watkins@jamesthomson The modem is pretty wild.
RevK 
@jamesthomson 260M at 1+ sec latency is weird. The tech on that must be impressive. Has to be some TCP spoofed stuff. I’d love to find details.
kasperdI think TCP window scaling is supposed to deal with that.
But I have also heard that computers used on ISS supposedly all do remote destktop to computers on the ground when they need any outside communication. But I don’t recall the source, so I am not sure if this is accurate.
Speaking of 1+ sec latency, some point in the past year I discovered that BIND 9 would completely fail to perform recursive lookups once latency exceeded 1 second. That came as a surprise to me as prior to that my experience had been that it was a robust DNS implementation.
@kasperd @jamesthomson TCP spoofed ACKs and a more robust transmission over the slow medium is a good trick for such things. But applications timeouts may also need tweaks. DNS is a good one, but a suitable DNS cache which has long timeouts can help. Similar to satellite comms issues. I assume they have some clever stuff!
Remote Desktop must be frustrating.
@kasperd @jamesthomson Trips further (Mars?) will need more complex systems which would almost certainly then interface to local IP networking each end. Email will be a biggie I expect, as well as simple messaging protocols.
Graham Adams@kasperd @jamesthomson @revk Perhaps it was falling back to TCP and DNS over TCP was blocked by the network? I have come across this before.
I don’t recall if it attempted falling back to TCP. There was no blocking on the network where the DNS recursor was hosted. But many authoritative DNS servers lack TCP support. In any case it also failed resolution with authoritative servers that did support TCP.
What I do recall observing was that the BIND 9 recursor would try all of the different authoritative DNS servers one after each other. It would simply ignore every DNS response if it had taken more than one second to arrive. Even after having received and ignored perfectly valid DNS responses it would keep sending more DNS requests over UDP to other authoritative servers for the domain.
Stephen Borrill@kasperd @jamesthomson @revk On the ISS, it was #Citrix XenDesktop for the desktop access and Branch Repeater to help with latency (uses lots of highly desktop-optimised caching). These are both the old product names.
https://www.informationweek.com/it-leadership/nasa-taps-citrix-for-tweets-from-space
https://www.informationweek.com/it-leadership/nasa-taps-citrix-for-tweets-from-space
@kasperd @jamesthomson @revk And in #Citrix tech support news, if they were still using that now and were using VHD profile containers to help with Outlook's PST files, then resetting those would be a good start if you had two Outlooks and neither on them worked...
🇺🇦 haxadecimal 🚫👑@jamesthomson
They must have been doing _something_ in the last half century.
They must have been doing _something_ in the last half century.
ROTOPE~1 ⭐️@jamesthomson damn, wish that was possible to do terrestrially.
Paco Hope@jamesthomson The anecdote I heard was that shortly after “one small step for man” they sent the equivalent of a core dump. I wonder how many stack traces they’ve sent over those fancy-ass lasers so far. 😛
Lizzy@jamesthomson who gives a shit when ww3 is happening and USA has no values to speak of
The Animal and the Machine@jamesthomson
I’d say!
The distance to the moon is 240,000 miles and a laser beam the width of a coin is hitting a satellite the size of a fridge (I think).
It’s so frickin’ NASA!
COMMANDer@jamesthomson How do the space people have over 16 times faster internet than me :_(
Zibat@jamesthomson In 2013, the LADEE Lunar Laser Communications Demonstration set a downlink record from the moon of 622 Mbps and an error free upload rate of 20. https://en.wikipedia.org/wiki/Lunar_Laser_Communication_Demonstration
Michael Slade@jamesthomson All 4 astronauts have iPhones but they are only for use as cameras. They can’t connect to the Internet..
grrl_aexand what is amazing is none of this modern high tech is even necessary to this project. After all, it was done successfully a half dozen times or more using tech over 50 years old. But yes, they do have a proper toilet this time around (sort of anyway).
BfPVDFUe@jamesthomson Still more than a lot of people have at home #internet
Ben Gillam 
@jamesthomson Pretty impresssive, especially when most of rural places in uk and Ireland have next to no connectivity.
We should get nasa to take over openreach 😂