The error beyond this level is due to local ionospheric conditions rather than the protocol. Corrections can be transmitted to interested receivers, WAAS is an example of such a system.
cm level accuracy is available with RTK. It works by comparing GPS signals from a known nearby location with that of a mobile receiver, providing what amounts to especially good correction. It works fine and you can get started at home for <$100.
A new protocol that does better than what we have right now will take some major breakthroughs.
cm level accuracy is available with RTK. It works by comparing GPS signals from a known nearby location with that of a mobile receiver, providing what amounts to especially good correction. It works fine and you can get started at home for <$100.
A new protocol that does better than what we have right now will take some major breakthroughs.