What is RTK?
RTK is a form of differential correction that uses fixed points instead of satellites for your correction signal.  This allows the RTK signal to provide repeatable sub-inch accuracy because there is no satellite drift as there is with most GPS correction signals.

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Why is ours better?
An RTK signal is pretty much an RTK signal no matter what brand you have, and while RTK offers an advantage over SF1 and SF2 signals, there is a big disadvantage in ALL brands of RTK systems - it's line of site.  In other words, if you can see the base tower, then you can get the signal.  If not, then you've lost the signal.  However, the John Deere, and only John Deere system, works differently.  We have RTK-Extend.  RTK-Extend allows the vehicle to continue to move in the desired path as long as it gets a packet of information (signal) from the base tower once every 15 minutes.  NOBODY else in the industry offers this feature, and this is why the John Deere system is better than every other system on the market today. 

For example, if you're planting using mapped-based prescriptions, and you lose the GPS signal from the RTK...on our John Deere Network, you keep on going with RTK-Extend, but on a competitor's network you stop and wait for the signal to come back, or worse yet, you never get a signal in that area, and you have to plant and drive manually.