Differential Global Positioning System (DGPS) is an enhancement to Global Positioning System that provides improved location accuracy, from the 15-meter nominal GPS accuracy to about 0.1 cm in case of the best implementations.
Kryptton GNSS Receiver
Kryptton GNSS Receiver empowered by a high precision inertial measurement unit (IMU) on Ultimate version, Kryptton GNSS receiver is a new generation of tilt survey GNSS receiver. This kind of calibration-free tilt compensation is immune to magnetic disturbances. Kryptton GNSS receiver gives a surveyor unprecedented flexibility and efficiency - holding the survey pole