[zeckalpha]

Their GPS steering is really cool. I think they get better accuracy through multiple GPS receivers spread out across the entire tractor.

[randomdata]

Some vendors use multiple receivers, but Deere uses one, with possibly one or more on the implement(s) being towed, depending on the configuration. RTK provides centimetre level accuracy with the single receiver.

[dmckeon]

It's complicated: https://en.wikipedia.org/wiki/StarFire_%28navigation_system%...