GPS receiver. The XR6 builds on the XR5. Using the same XR5 chips, the XR6 adds extra computing power and memory to allow a 10 Hz real-time solution to be computed. In addition, it does a background 1Hz RTK (Real-Time Kinematic) position solution accurate to a few cm or 10’s centimetres relative to the base station position, depending on separation and convergence time. This is a more accurate form of Differential GPS.
The unit also features an extra third XR5 chip to provide the control for the extra computer chip. Optionally adds a Solid State Recorder (similar to a very early flash memory) to record positions or raw GPS measurements for more accurate off-line processing.
The MK-I version used the XR6 RF radio board and the MK-II version used a newer, smaller XR7 based RF radio board.
The XR6-SHARPE was in production from 1996 to about 2014.