3 ms·
> the GPS signal is in the neighborhood of a femtowatt by the time it hits a receiver. This sounds more dramatic than it is - my WiFi signal from less than 10
by ac29 7y ago
> the GPS signal is in the neighborhood of a femtowatt by the time it hits a receiver.
This sounds more dramatic than it is - my WiFi signal from less than 10 feet away is approximately 1 nanowatt, or approximately 10^8 times weaker than when it left the AP radio. Thats just how RF works.
- Rebelgecko 7y agoIt's still pretty dramatic when you compare them directly. A 500watt transmitter that's 30,000km away is going to be many orders of magnitude (11?) weaker than a 10watt transmitter that's only 1km away.