Microblog Memes

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A place to share screenshots of Microblog posts, whether from Mastodon, tumblr, ~~Twitter~~ X, KBin, Threads or elsewhere.

Created as an evolution of White People Twitter and other tweet-capture subreddits.

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Starlink v2 satelites will ruin science. (feddit.org)

submitted 3 months ago by [email protected] to c/[email protected]

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Mastodon Toot.

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[–] [email protected] 8 points 3 months ago* (last edited 3 months ago) (1 children)

The geosynchronous satellites are about ~~650~~ 65 times higher than Starlink satellites, so the speed of light is a significant limiting factor.

Geosynchronous orbit is 35,700 km (3.57 x 10^7 m) above sea level. At that distance, signals moving at the speed of light (3.0 x 10^8 m/s) take about .12 seconds to go that far. So a round trip is about .240 seconds or 240 milliseconds added to the ping.

Starlink orbits at an altitude of 550 km (5.5 x 10^5 m), where the signal can travel between ground and satellite in about 0.0018 seconds, for 3.6 millisecond round trip. Actual routing and processing of signals, especially relaying between satellites, adds time to the processing.

But no matter how much better the signal processing can get, the speed of light accounts for about a 200-230 millisecond difference at the difference in altitudes.

[–] [email protected] 2 points 3 months ago* (last edited 3 months ago)

Thanks! That's the shit for which I come to Lemmy. Genuinely, thank you.

I work in broadcast communications and we use geosync link ups all the time for various shit. I'm pretty sure I know more about satellite communications than a normie, but I'm blind to the intricacies of use case when it comes to stuff like this.