What GPS (satellite navigation) is made of
Finding a position from satellite signals.
- Artificial satellite — has part. A constellation of satellites.
- Atomic clock — uses. The satellites carry atomic clocks; the position is calculated from signal arrival times.
- Electromagnetic waves — uses. Radio signals.
- Theory of relativity — uses. Corrections for the relativistic slowing of clocks.
- Silicon — is made of. The receivers are silicon.