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by fosk 4585 days ago
What are other good alternatives to GPS?
3 comments
tcas 4584 days ago
Inertial navigation systems[1] have been used for more years than GPS has existed. Even now almost all military drones / rockets / ICBMs use very precise inertial systems.

[1] http://en.wikipedia.org/wiki/Inertial_navigation_system

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nwh 4585 days ago
http://en.wikipedia.org/wiki/GLONASS
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MikeCodeAwesome 4585 days ago
Two guesses: cellular location services and custom radio telemetry systems. Maybe that's one guess.
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