- Joined
- Feb 8, 2008
- Messages
- 1,649
- Reaction score
- 4
- Points
- 38
- Location
- Hampshire, UK
- Website
- orbiter.quorg.org
Does anyone know what the theoretical/practical limits of GPS are? From a little digging on the web, they constellations orbit at 22,000km altitude and presumably do not have omnidirectional transmitters, so the maximum altitude is probably somewhere below 22,000km. I know that they use GPS on the shuttle (and probably ISS) whilst in orbit and that ITAR regulations cap 'consumer' GPS units at a max altitude of 60,000 feet and 1,000 knots.
Anyone know what the actual limit of 'unrestricted' GPS is in terms of altitude and speed?
Anyone know what the actual limit of 'unrestricted' GPS is in terms of altitude and speed?