25 ms·
They left out one of the more interesting aspects of GPS calculations, which is the corrections that must be made for special & general relativistic effects.
by defen 17y ago
They left out one of the more interesting aspects of GPS calculations, which is the corrections that must be made for special & general relativistic effects.
- cnvogel 17y agoThose corrections are not actually essential for GPS to function. In first order it's only the satellites clocks that have to be run at a slightly elevated frequency (or is it the other way round? Don't know). The actual GPS receivers don't have to mess with relativity at all.
- defen 17y agoThe satellite clocks run at a slightly lower frequency than the desired frequency on Earth: 10.22999999543 MHz instead of 10.23 MHz. http://en.wikipedia.org/wiki/Gps#Relativity http://en.wikipedia.org/wiki/Gps#Relativity