FWIW I built an RTK GPS system with two raspberry pi’s and three $75 GPS receivers and it has 3cm accuracy. Deere didn’t do anything to get that accuracy beyond

FWIW I built an RTK GPS system with two raspberry pi’s and three $75 GPS receivers and it has 3cm accuracy. Deere didn’t do anything to get that accuracy beyond integrating existing GPS technology in to their tractors. For others that want to know more check out: http://rtkexplorer.com/ http://rtkexplorer.com/ Also there’s a new device called the OpenRTK330 that looks promising.