Originally Posted by
Ranger Dan
A friend of mine has a business burying drainage tile in fields. He tells me that the in-cab computer in his tractor, using RTK (Real Time Kinematic) with GPS, can maintain the depth of the tile within 1 centimeter as he (or the computer, actually) drives across the field.
Yes - that's really impressive. A scheme to use the carrier phase to get relative positions to centimeters!