3 ms·
Cellphones are UHF which follows a line-of-sight propagation pattern. It transmits much better through an empty sky than across the ground where there are obst
by kube-system 3y ago
Cellphones are UHF which follows a line-of-sight propagation pattern. It transmits much better through an empty sky than across the ground where there are obstacles.
The Voyager spacecraft are billions of miles away and use 23 watt radios. The video streamed from the moon landing used a 20 watt radio to transmit a quarter-million miles.
Starlink is just a couple hundred miles up.
- sbierwagen 3y ago>23 watt radio Transmitting from a 3.6 meter wide parabolic antenna, received by 70 meter wide parabolics, at a rate of 160 bits per second...
- kube-system 3y agoAnd about 30 million times the distance.
- lostmsu 3y agoWhich is just under 1 000 000 000 000 000 times more signal strength loss assuming quadratic dispersion.