4 ms·
Inverse square law. For the same transmit power, your received signal strength diminishes with the square of the distance That received signal strength is wha
by zild3d 7y ago
Inverse square law. For the same transmit power, your received signal strength diminishes with the square of the distance
That received signal strength is what determines channel capacity (C) which is the upper limit on the bit rate you can get.
see Friis and Shannon's channel capacity
[0] https://en.wikipedia.org/wiki/Friis_transmission_equation https://en.wikipedia.org/wiki/Friis_transmission_equation
[1] https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theore...
- martinald 7y agoYes, I get that. But it seems that performance has barely improved since the 1970s despite the massive gains in telecommunication efficiencies since then. Or is the SNR so poor that even 1970s era technology was able to be close to the limit?
- garmaine 7y agoThese are physical restrictions, not technological.
- martinald 7y agoWhat about the laser technology NASA is developing? That should be a lot faster than current radio based technology?
- greglindahl 7y agoTitan has smog in the visible spectrum. Details matter! The technology is also not that mature, yet.
- nradov 7y agoFocusing a laser at that range requires a rather large diameter heavy set of optical components.
- anticensor 7y agoYou will need a blinding-strong laser.