4 ms·

I wonder what the ping/latency is...

tomxor 5y ago
(Current) One-Way Light Time = 21:35:13 [0] So 43 hours 10 minutes 26 seconds minimum, excluding processing time. That's probably another record... Although I'm pretty sure it can't process ICMPs, so "ping" in the more general sense. [0] https://voyager.jpl.nasa.gov/mission/status/ https://voyager.jpl.nasa.gov/mission/status/
- benbristow 5y ago
  That must be fun over SSH/Telnet. 43 hours between every key press Joking, but thanks for the interesting info (and Frost1x also).
  - _joel 5y ago
    Come on, SSH and Telnet? That's ludicrous. It's a job for https://mosh.org/ https://mosh.org/
    - rzzzt 5y ago
      At the very least, local echo must be enabled.
- tanbogy 5y ago
  And I used to get angry with 250ms ping playing WoW.
- mrb 5y ago
  Neither ICMP nor IPv4 existed when the Voyager probes were launched in 1977 :) ICMP was created in 1981
  - tomxor 5y ago
    Yeah, that's what I was implying ;D I think an older probe also took the first digital pictures before bitmap images were a thing, they could digitise it at the probe end but had to colour in the pixels on a piece of paper at the other end if I recall correctly. Point is, NASA had to solve a lot of digital communication problems long before they had established terrestrial solutions or before computers were even capable of solving the whole problem on their own. Then again, even if the timing was reversed, a lot of terrestrial communication protocols have no chance of working properly at the ranges required for space exploration - something I've been meaning to look into is the redundancy requirements over those long distances, since re-transmission is so costly in terms of latency that it probably makes sense to pack as much redundancy into the signal as possible, we already do this with terrestrial communication in the form of various codes, but there's a finer balance between increased bandwidth and the relatively low latency cost of re-transmission in the case of unrecoverable sequences... I'm guessing you want a far lower probability of loss for a 43 hour round trip.
Frost1x 5y ago
~23.2B km / c (m/s) seconds, so about 43 hours or roughly the time to get through to an arbitrary customer service representative these days.
- sizzzzlerz 5y ago
  ping... Hello. You've reached the Voyager I spacecraft. We can't answer your ping right now but if you'd like to leave a message, please, do so after the beep. We look forward to servicing your request as soon as possible.

(Current) One-Way Light Time = 21:35:13 [0] So 43 hours 10 minutes 26 seconds minimum, excluding processing time. That's probably another record... Although I'm pretty sure it can't process ICMPs, so "ping" in the more general sense. [0] https://voyager.jpl.nasa.gov/mission/status/ https://voyager.jpl.nasa.gov/mission/status/

benbristow 5y ago
That must be fun over SSH/Telnet. 43 hours between every key press Joking, but thanks for the interesting info (and Frost1x also).
- _joel 5y ago
  Come on, SSH and Telnet? That's ludicrous. It's a job for https://mosh.org/ https://mosh.org/
  - rzzzt 5y ago
    At the very least, local echo must be enabled.
tanbogy 5y ago
And I used to get angry with 250ms ping playing WoW.
mrb 5y ago
Neither ICMP nor IPv4 existed when the Voyager probes were launched in 1977 :) ICMP was created in 1981
- tomxor 5y ago
  Yeah, that's what I was implying ;D I think an older probe also took the first digital pictures before bitmap images were a thing, they could digitise it at the probe end but had to colour in the pixels on a piece of paper at the other end if I recall correctly. Point is, NASA had to solve a lot of digital communication problems long before they had established terrestrial solutions or before computers were even capable of solving the whole problem on their own. Then again, even if the timing was reversed, a lot of terrestrial communication protocols have no chance of working properly at the ranges required for space exploration - something I've been meaning to look into is the redundancy requirements over those long distances, since re-transmission is so costly in terms of latency that it probably makes sense to pack as much redundancy into the signal as possible, we already do this with terrestrial communication in the form of various codes, but there's a finer balance between increased bandwidth and the relatively low latency cost of re-transmission in the case of unrecoverable sequences... I'm guessing you want a far lower probability of loss for a 43 hour round trip.

Frost1x 5y ago

~23.2B km / c (m/s) seconds, so about 43 hours or roughly the time to get through to an arbitrary customer service representative these days.

sizzzzlerz 5y ago
ping... Hello. You've reached the Voyager I spacecraft. We can't answer your ping right now but if you'd like to leave a message, please, do so after the beep. We look forward to servicing your request as soon as possible.