there’s no fundamental physics limitation that makes this true. in fact, light in a vacuum travels faster than in glass fiber, so the theoretical latency of LEO internet is actually faster compared to fiber over a certain distance
For nieve signal distances, that can sometimes be true. That’s not how starlink works however. It bounces the signal between satellites, each adding latency. Overall, fibre wins in almost every situation.
The bigger problem is saturation. Most things you can apply to radio waves can be applied to light in a fibre. The difference is you can have multiple fibres on the same run. This massively increases bandwidth, and so prevents congestion.
Just checked the numbers. Starlink is up at 550km. That means a minimum round trip of 1100km. In order to beat a fibre run, you are looking at over 2000km distance. Even halving that to (optimistically) account for angles, that’s still a LONG run to an initial data center.
Satellites need to orbit at some distance above the planet though, so the round trip will always be fairly long even for ones with a pretty close orbit.
there’s no fundamental physics limitation that makes this true. in fact, light in a vacuum travels faster than in glass fiber, so the theoretical latency of LEO internet is actually faster compared to fiber over a certain distance
For nieve signal distances, that can sometimes be true. That’s not how starlink works however. It bounces the signal between satellites, each adding latency. Overall, fibre wins in almost every situation.
The bigger problem is saturation. Most things you can apply to radio waves can be applied to light in a fibre. The difference is you can have multiple fibres on the same run. This massively increases bandwidth, and so prevents congestion.
Just checked the numbers. Starlink is up at 550km. That means a minimum round trip of 1100km. In order to beat a fibre run, you are looking at over 2000km distance. Even halving that to (optimistically) account for angles, that’s still a LONG run to an initial data center.
Satellites need to orbit at some distance above the planet though, so the round trip will always be fairly long even for ones with a pretty close orbit.